GnRH antagonists with estrogen/progesterone are promising new uterine-sparing options for treating uterine fibroids. Two experts review data from two recent clinical trials to bring you up to speed on the benefits and risks of this treatment approach.

After reading this short article, you have an opportunity to earn 1.0 CME credits.

Click here to read more

GnRH antagonists with estrogen/progesterone are promising new uterine-sparing options for treating uterine fibroids. Two experts review data from two recent clinical trials to bring you up to speed on the benefits and risks of this treatment approach.

After reading this short article, you have an opportunity to earn 1.0 CME credits.

Click here to read more

GnRH antagonists with estrogen/progesterone are promising new uterine-sparing options for treating uterine fibroids. Two experts review data from two recent clinical trials to bring you up to speed on the benefits and risks of this treatment approach.

After reading this short article, you have an opportunity to earn 1.0 CME credits.

Click here to read more

Cognition represents the most important function of the human brain and the essence of the mind. Cognitive functions such as memory, learning, comprehension, processing speed, attention, planning, and problem-solving are the best indicators of the status of brain health.

Many psychiatric brain disorders are associated with cognitive impairments. Decades of extensive research have documented that the most severe cognitive deficits occur in schizophrenia. No wonder Emil Kraepelin coined the term “dementia praecox,” which means premature dementia (in youth)¹ for this neuropsychiatric brain disorder. This condition was later renamed schizophrenia by Eugen Bleuler,² who regarded it primarily as a thought disorder, with splitting of associations (not split personality, as misinterpreted by many in the public). Interestingly, a century ago both of those early masters of psychiatry de-emphasized psychotic symptoms (delusions and hallucinations), regarding them as “supplemental symptoms.”³ Yet for the next 100 years, clinicians overemphasized psychotic symptoms in schizophrenia and overlooked the more disabling cognitive impairment and negative symptoms, referred to as Bleuler’s 4 A’s—Associations disruption, Ambivalence, Affect pathology, and Avolition—symptoms that persist even after the psychotic symptoms are successfully treated.³

Most contemporary researchers regard cognitive impairment as the “core” feature of schizophrenia.⁴ The justification of this view is that cognitive deficits are detected in childhood and early adolescence (by age 13),⁵ long before the appearance of psychotic symptoms, and many studies have confirmed that cognitive deficits are the primary cause of functional disability and unemployment of patients with schizophrenia. Cognitive dysfunction is also found in milder forms in the parents and siblings of patients with schizophrenia,⁶ and is thus considered an “endophenotype” of the illness.

Because of its centrality, cognition has emerged as a major focus of schizophrenia research over the past 20 years. Multiple stakeholders (academic investigators, the National Institute of Mental Health, and the FDA) have collaborated to develop a standard measurement for cognition in schizophrenia. The project culminated in what was labeled MATRICS (Measurement and Treatment Research to Improve Cognition in Schizophrenia).⁷ The MATRICS settled on a battery of 7 major cognitive functions that are often impaired in individuals with schizophrenia (Table 1⁸). Most contemporary researchers have adopted MATRICS in their studies, which facilitates replication to confirm research findings.

Measuring cognition in patients with schizophrenia is extremely important, as critical as measuring fasting glucose in patients with diabetes or blood pressure in patients with hypertension. Measuring the extent of impairment or nonimpairment across various cognitive tests can help with vocational rehabilitation, to place a patient in a job consistent with their level of cognitive functioning. In addition, once medications are developed and approved for cognitive impairments in schizophrenia, measuring cognition will be necessary to gauge the degree of improvement.

Currently, few psychiatric practitioners measure cognition in their patients. This is perplexing because cognitive measurement is important for confirming the diagnosis of schizophrenia in first-episode psychosis, or distinguishing it from other psychotic disorders (such as drug-induced psychosis, brief reactive psychosis, or delusional disorders) that do not have severe cognitive deficits.

The scores of various cognitive functions in individuals with schizophrenia range from .75 to 2.0 SD below the performance of the general population (matched for age and gender).⁹ This translates to dismally low percentiles of 2% and 24%. It is essential that all clinicians measure cognition in every patient with psychotic symptoms. It can be argued that cognition should even be measured in other psychiatric patients because cognitive deficits have been well documented in bipolar disorder, major depressive disorder, attention-deficit/hyperactivity disorder, and other disorders, albeit not as severe as in schizophrenia, and these deficits usually correlate with the patient’s vocational and social functioning.

Continue to: So how is cognition measured...

So how is cognition measured, and can clinicians incorporate cognitive batteries in their practices? The most logical answer is to refer the patient to a board-certified neuropsychologist. These specialists are well-trained in assessing cognitive functions, and their evaluations generally are covered by health insurance. They use various validated cognitive batteries. Table 2^10-18 lists the currently recognized cognitive assessments and how much time they require. Psychiatrists can have nurses or medical assistants administer a brief cognitive test.

C-SARS: A self-rated cognition scale

Patient self-rating can provide psychiatric clinicians with valuable information, and is a time-saver. The widely used Patient Health Questionaire-9 (PHQ-9)¹⁹ is an excellent example of a self-rating scale for depression that enables patients to recognize and rate their depressive symptoms. It immediately informs the clinician how depressed their patient is and whether the severity of the depression has improved from the previous visit, which can indicate whether the prescribed medication is working. Based on the PHQ-9, which I regularly use—and recognizing that there is no cognition counterpart and that almost all clinicians could use a practical method of measuring their patients’ cognitive function—I developed an instrument called the Cognition Self-Assessment Rating Scale (C-SARS) (Table 3). The C-SARS can be completed online at https://curesz.org/csars/ and patients will be emailed the results within a minute. The C-SARS can be completed by the patient (with the help of their family or caregiver, if necessary, who observe the patient’s daily functioning, which corresponds to their cognition). The main purpose of the C-SARS is to inform the clinician about serious cognitive dysfunction in their patients, which should instigate a referral for formal neurocognitive assessment by a neuropsychology expert.

The items on the C-SARS reflect how well the patient is performing routine daily functions, each of which correlates with one of the cognitive domains of the MATRICS battery. Table 3 shows the 12 items in the C-SARS, their scoring, and their clinical implications (ie, when the results require referral for formal neurocognitive testing). In the future, when the FDA approves medications for addressing cognitive impairment (and several molecules are currently undergoing clinical trials), clinicians will be able to gauge a patient’s response to such treatments using the C-SARS and formal testing as needed. It may take several weeks to detect a significant reversal of cognitive deficits, but doing so would address a major unmet need in schizophrenia and may speed up vocational rehabilitation. The C-SARS also contains 2 items related to social cognition (items 11 and 12), which is also impaired in schizophrenia.²⁰ Future medications that improve social cognition in addition to neurocognition may also lead to improved social functioning among patients with schizophrenia.

In conclusion, the C-SARS, which needs to be validated in controlled studies, is the first cognition self-rating scale for schizophrenia and may be useful for other major psychiatric disorders. It will be a substantial time-saver for clinicians and will facilitate the routine incorporation of the cognitive assessment of patients with psychotic symptoms to help with the differential diagnosis of schizophrenia vs other psychotic disorders. Measuring cognitive functions is a vital step towards the valid diagnosis and treatment of this major clinical challenge in schizophrenia and improving patient outcomes in this serious psychiatric brain syndrome, in which up to 98% of patients have cognitive impairment across several domains.²¹

Cognition represents the most important function of the human brain and the essence of the mind. Cognitive functions such as memory, learning, comprehension, processing speed, attention, planning, and problem-solving are the best indicators of the status of brain health.

Many psychiatric brain disorders are associated with cognitive impairments. Decades of extensive research have documented that the most severe cognitive deficits occur in schizophrenia. No wonder Emil Kraepelin coined the term “dementia praecox,” which means premature dementia (in youth)¹ for this neuropsychiatric brain disorder. This condition was later renamed schizophrenia by Eugen Bleuler,² who regarded it primarily as a thought disorder, with splitting of associations (not split personality, as misinterpreted by many in the public). Interestingly, a century ago both of those early masters of psychiatry de-emphasized psychotic symptoms (delusions and hallucinations), regarding them as “supplemental symptoms.”³ Yet for the next 100 years, clinicians overemphasized psychotic symptoms in schizophrenia and overlooked the more disabling cognitive impairment and negative symptoms, referred to as Bleuler’s 4 A’s—Associations disruption, Ambivalence, Affect pathology, and Avolition—symptoms that persist even after the psychotic symptoms are successfully treated.³

Most contemporary researchers regard cognitive impairment as the “core” feature of schizophrenia.⁴ The justification of this view is that cognitive deficits are detected in childhood and early adolescence (by age 13),⁵ long before the appearance of psychotic symptoms, and many studies have confirmed that cognitive deficits are the primary cause of functional disability and unemployment of patients with schizophrenia. Cognitive dysfunction is also found in milder forms in the parents and siblings of patients with schizophrenia,⁶ and is thus considered an “endophenotype” of the illness.

Because of its centrality, cognition has emerged as a major focus of schizophrenia research over the past 20 years. Multiple stakeholders (academic investigators, the National Institute of Mental Health, and the FDA) have collaborated to develop a standard measurement for cognition in schizophrenia. The project culminated in what was labeled MATRICS (Measurement and Treatment Research to Improve Cognition in Schizophrenia).⁷ The MATRICS settled on a battery of 7 major cognitive functions that are often impaired in individuals with schizophrenia (Table 1⁸). Most contemporary researchers have adopted MATRICS in their studies, which facilitates replication to confirm research findings.

Measuring cognition in patients with schizophrenia is extremely important, as critical as measuring fasting glucose in patients with diabetes or blood pressure in patients with hypertension. Measuring the extent of impairment or nonimpairment across various cognitive tests can help with vocational rehabilitation, to place a patient in a job consistent with their level of cognitive functioning. In addition, once medications are developed and approved for cognitive impairments in schizophrenia, measuring cognition will be necessary to gauge the degree of improvement.

Currently, few psychiatric practitioners measure cognition in their patients. This is perplexing because cognitive measurement is important for confirming the diagnosis of schizophrenia in first-episode psychosis, or distinguishing it from other psychotic disorders (such as drug-induced psychosis, brief reactive psychosis, or delusional disorders) that do not have severe cognitive deficits.

The scores of various cognitive functions in individuals with schizophrenia range from .75 to 2.0 SD below the performance of the general population (matched for age and gender).⁹ This translates to dismally low percentiles of 2% and 24%. It is essential that all clinicians measure cognition in every patient with psychotic symptoms. It can be argued that cognition should even be measured in other psychiatric patients because cognitive deficits have been well documented in bipolar disorder, major depressive disorder, attention-deficit/hyperactivity disorder, and other disorders, albeit not as severe as in schizophrenia, and these deficits usually correlate with the patient’s vocational and social functioning.

Continue to: So how is cognition measured...

So how is cognition measured, and can clinicians incorporate cognitive batteries in their practices? The most logical answer is to refer the patient to a board-certified neuropsychologist. These specialists are well-trained in assessing cognitive functions, and their evaluations generally are covered by health insurance. They use various validated cognitive batteries. Table 2^10-18 lists the currently recognized cognitive assessments and how much time they require. Psychiatrists can have nurses or medical assistants administer a brief cognitive test.

C-SARS: A self-rated cognition scale

Patient self-rating can provide psychiatric clinicians with valuable information, and is a time-saver. The widely used Patient Health Questionaire-9 (PHQ-9)¹⁹ is an excellent example of a self-rating scale for depression that enables patients to recognize and rate their depressive symptoms. It immediately informs the clinician how depressed their patient is and whether the severity of the depression has improved from the previous visit, which can indicate whether the prescribed medication is working. Based on the PHQ-9, which I regularly use—and recognizing that there is no cognition counterpart and that almost all clinicians could use a practical method of measuring their patients’ cognitive function—I developed an instrument called the Cognition Self-Assessment Rating Scale (C-SARS) (Table 3). The C-SARS can be completed online at https://curesz.org/csars/ and patients will be emailed the results within a minute. The C-SARS can be completed by the patient (with the help of their family or caregiver, if necessary, who observe the patient’s daily functioning, which corresponds to their cognition). The main purpose of the C-SARS is to inform the clinician about serious cognitive dysfunction in their patients, which should instigate a referral for formal neurocognitive assessment by a neuropsychology expert.

The items on the C-SARS reflect how well the patient is performing routine daily functions, each of which correlates with one of the cognitive domains of the MATRICS battery. Table 3 shows the 12 items in the C-SARS, their scoring, and their clinical implications (ie, when the results require referral for formal neurocognitive testing). In the future, when the FDA approves medications for addressing cognitive impairment (and several molecules are currently undergoing clinical trials), clinicians will be able to gauge a patient’s response to such treatments using the C-SARS and formal testing as needed. It may take several weeks to detect a significant reversal of cognitive deficits, but doing so would address a major unmet need in schizophrenia and may speed up vocational rehabilitation. The C-SARS also contains 2 items related to social cognition (items 11 and 12), which is also impaired in schizophrenia.²⁰ Future medications that improve social cognition in addition to neurocognition may also lead to improved social functioning among patients with schizophrenia.

In conclusion, the C-SARS, which needs to be validated in controlled studies, is the first cognition self-rating scale for schizophrenia and may be useful for other major psychiatric disorders. It will be a substantial time-saver for clinicians and will facilitate the routine incorporation of the cognitive assessment of patients with psychotic symptoms to help with the differential diagnosis of schizophrenia vs other psychotic disorders. Measuring cognitive functions is a vital step towards the valid diagnosis and treatment of this major clinical challenge in schizophrenia and improving patient outcomes in this serious psychiatric brain syndrome, in which up to 98% of patients have cognitive impairment across several domains.²¹

Cognition represents the most important function of the human brain and the essence of the mind. Cognitive functions such as memory, learning, comprehension, processing speed, attention, planning, and problem-solving are the best indicators of the status of brain health.

Many psychiatric brain disorders are associated with cognitive impairments. Decades of extensive research have documented that the most severe cognitive deficits occur in schizophrenia. No wonder Emil Kraepelin coined the term “dementia praecox,” which means premature dementia (in youth)¹ for this neuropsychiatric brain disorder. This condition was later renamed schizophrenia by Eugen Bleuler,² who regarded it primarily as a thought disorder, with splitting of associations (not split personality, as misinterpreted by many in the public). Interestingly, a century ago both of those early masters of psychiatry de-emphasized psychotic symptoms (delusions and hallucinations), regarding them as “supplemental symptoms.”³ Yet for the next 100 years, clinicians overemphasized psychotic symptoms in schizophrenia and overlooked the more disabling cognitive impairment and negative symptoms, referred to as Bleuler’s 4 A’s—Associations disruption, Ambivalence, Affect pathology, and Avolition—symptoms that persist even after the psychotic symptoms are successfully treated.³

Most contemporary researchers regard cognitive impairment as the “core” feature of schizophrenia.⁴ The justification of this view is that cognitive deficits are detected in childhood and early adolescence (by age 13),⁵ long before the appearance of psychotic symptoms, and many studies have confirmed that cognitive deficits are the primary cause of functional disability and unemployment of patients with schizophrenia. Cognitive dysfunction is also found in milder forms in the parents and siblings of patients with schizophrenia,⁶ and is thus considered an “endophenotype” of the illness.

Because of its centrality, cognition has emerged as a major focus of schizophrenia research over the past 20 years. Multiple stakeholders (academic investigators, the National Institute of Mental Health, and the FDA) have collaborated to develop a standard measurement for cognition in schizophrenia. The project culminated in what was labeled MATRICS (Measurement and Treatment Research to Improve Cognition in Schizophrenia).⁷ The MATRICS settled on a battery of 7 major cognitive functions that are often impaired in individuals with schizophrenia (Table 1⁸). Most contemporary researchers have adopted MATRICS in their studies, which facilitates replication to confirm research findings.

Measuring cognition in patients with schizophrenia is extremely important, as critical as measuring fasting glucose in patients with diabetes or blood pressure in patients with hypertension. Measuring the extent of impairment or nonimpairment across various cognitive tests can help with vocational rehabilitation, to place a patient in a job consistent with their level of cognitive functioning. In addition, once medications are developed and approved for cognitive impairments in schizophrenia, measuring cognition will be necessary to gauge the degree of improvement.

Currently, few psychiatric practitioners measure cognition in their patients. This is perplexing because cognitive measurement is important for confirming the diagnosis of schizophrenia in first-episode psychosis, or distinguishing it from other psychotic disorders (such as drug-induced psychosis, brief reactive psychosis, or delusional disorders) that do not have severe cognitive deficits.

The scores of various cognitive functions in individuals with schizophrenia range from .75 to 2.0 SD below the performance of the general population (matched for age and gender).⁹ This translates to dismally low percentiles of 2% and 24%. It is essential that all clinicians measure cognition in every patient with psychotic symptoms. It can be argued that cognition should even be measured in other psychiatric patients because cognitive deficits have been well documented in bipolar disorder, major depressive disorder, attention-deficit/hyperactivity disorder, and other disorders, albeit not as severe as in schizophrenia, and these deficits usually correlate with the patient’s vocational and social functioning.

Continue to: So how is cognition measured...

So how is cognition measured, and can clinicians incorporate cognitive batteries in their practices? The most logical answer is to refer the patient to a board-certified neuropsychologist. These specialists are well-trained in assessing cognitive functions, and their evaluations generally are covered by health insurance. They use various validated cognitive batteries. Table 2^10-18 lists the currently recognized cognitive assessments and how much time they require. Psychiatrists can have nurses or medical assistants administer a brief cognitive test.

C-SARS: A self-rated cognition scale

Patient self-rating can provide psychiatric clinicians with valuable information, and is a time-saver. The widely used Patient Health Questionaire-9 (PHQ-9)¹⁹ is an excellent example of a self-rating scale for depression that enables patients to recognize and rate their depressive symptoms. It immediately informs the clinician how depressed their patient is and whether the severity of the depression has improved from the previous visit, which can indicate whether the prescribed medication is working. Based on the PHQ-9, which I regularly use—and recognizing that there is no cognition counterpart and that almost all clinicians could use a practical method of measuring their patients’ cognitive function—I developed an instrument called the Cognition Self-Assessment Rating Scale (C-SARS) (Table 3). The C-SARS can be completed online at https://curesz.org/csars/ and patients will be emailed the results within a minute. The C-SARS can be completed by the patient (with the help of their family or caregiver, if necessary, who observe the patient’s daily functioning, which corresponds to their cognition). The main purpose of the C-SARS is to inform the clinician about serious cognitive dysfunction in their patients, which should instigate a referral for formal neurocognitive assessment by a neuropsychology expert.

The items on the C-SARS reflect how well the patient is performing routine daily functions, each of which correlates with one of the cognitive domains of the MATRICS battery. Table 3 shows the 12 items in the C-SARS, their scoring, and their clinical implications (ie, when the results require referral for formal neurocognitive testing). In the future, when the FDA approves medications for addressing cognitive impairment (and several molecules are currently undergoing clinical trials), clinicians will be able to gauge a patient’s response to such treatments using the C-SARS and formal testing as needed. It may take several weeks to detect a significant reversal of cognitive deficits, but doing so would address a major unmet need in schizophrenia and may speed up vocational rehabilitation. The C-SARS also contains 2 items related to social cognition (items 11 and 12), which is also impaired in schizophrenia.²⁰ Future medications that improve social cognition in addition to neurocognition may also lead to improved social functioning among patients with schizophrenia.

In conclusion, the C-SARS, which needs to be validated in controlled studies, is the first cognition self-rating scale for schizophrenia and may be useful for other major psychiatric disorders. It will be a substantial time-saver for clinicians and will facilitate the routine incorporation of the cognitive assessment of patients with psychotic symptoms to help with the differential diagnosis of schizophrenia vs other psychotic disorders. Measuring cognitive functions is a vital step towards the valid diagnosis and treatment of this major clinical challenge in schizophrenia and improving patient outcomes in this serious psychiatric brain syndrome, in which up to 98% of patients have cognitive impairment across several domains.²¹

Several digital therapeutics (DTx) – evidence-based interventions delivered via mobile app or Web-based platforms – could help patients with irritable bowel syndrome (IBS), according to a new review of available products.

These tools aren’t widely used by gastroenterologists yet, but the market is expected to grow broadly during the next decade.

“Digital therapeutics make so much sense and solve so many access issues,” coauthor William Chey, MD, chief of gastroenterology at the University of Michigan, Ann Arbor, said in an interview. “Because of this, their promise could easily outstrip their substance. We need to hold digital therapeutics companies accountable for proper evidence of benefit, so patients and doctors don’t end up chasing the latest shiny object.”

The review was published online in The American Journal of Gastroenterology.
 

Understanding the apps

IBS is most effectively treated with a combination of medications, diet changes, and behavioral interventions that are specific to the patient, the authors write. Cognitive behavioral therapy (CBT) and gut-directed hypnotherapy (GDH) have been effective at modifying behaviors and thought patterns, they add.

However, many gastroenterologists and their patients with IBS don’t have easy access to the mental health services component of integrated gastrointestinal (GI) care. DTx may offer a solution.

The review by Dr. Chey and colleagues is intended to serve as a primer for gastroenterologists about the current generation of DTx that provide virtual behavioral health interventions. For each product, they include a description of its services, evidence supporting its use, and other key information.

Mahana IBS, made by Mahana Therapeutics, is an FDA-approved, prescription-only CBT program for adults with IBS. The maximum out-of-pocket cost is $90. The product includes 10 sessions over 12 weeks.

Available as a mobile app or Web-based platform, Mahana IBS was validated in a randomized comparative effectiveness trial in a group of 558 patients, divided into three groups who received Web-based CBT, phone-based CBT, or treatment as usual. Before treatment, the mean IBS Symptom Severity Score for the entire group was 265.

At 12 weeks, the control group had an average reduction of 52.9 points, while the phone-based therapy group had a reduction of 133.3 points, and the Web-based therapy group had a reduction of 101.2 points. The average Work and Social Adjustment Scale (WSAS) decreased by an additional 3.5 points in the phone-based group and 3 points in the Web-based group, compared with the control group.

Zemedy, made by Bold Health, is a mobile app that provides virtual CBT through a chat bot for patients with IBS. It costs $19.49 per month or $154.99 per year. The app isn’t FDA-approved and doesn’t require a prescription.

The program includes six weekly psychoeducational modules with information about IBS and CBT, followed by CBT training modules. Users can chat with an automated system that provides computer-generated responses for support. A “flare module” supports patients when symptoms worsen.

Zemedy was evaluated in a crossover randomized controlled trial with 62 people in an active treatment group and 59 people in a wait-list control group. The app improved several measures, including self-reported IBS-quality of life, GI symptoms on the IBS rating scale, the Fear of Food Questionnaire, the Visceral Sensitivity Index, and the Depression Anxiety Stress Scale.

A larger clinical trial to validate the results is ongoing.

Regulora, made by metaMe Health, is an FDA-approved, prescription-only GDH program aimed at addressing abdominal pain related to IBS. The maximum out-of-pocket cost is $75. The protocols were developed by GI behavioral health researchers at the University of North Carolina at Chapel Hill. Available on a Web-based platform or as a mobile app, the program includes seven sessions of 30 minutes each over 12 weeks.

Regulora was evaluated in a randomized comparative effectiveness trial of 362 patients who used either this program or an app focused on muscle relaxation. The primary endpoint was the proportion of patients with a 30% or more reduction in abdominal pain intensity, and although the researchers found no significant difference between them, there was some relief. In the GDH group, 31% of participants reported a 30% or greater reduction in abdominal pain intensity, and 45% experienced a 30% or greater improvement in the proportion of stools with normal consistency.

The complete results of the trial still need to receive formal peer review and publication in a scientific journal.

Nerva, made by Mindset Health, is a GDH program delivered by mobile app or Web browser that costs $79.99 for 3 months. It isn’t FDA-approved and doesn’t require a prescription. The protocols were developed in collaboration with researchers from Monash University in Melbourne. The program features 6 weeks of daily sessions, psychoeducation readings, and breathing techniques.

Nerva was evaluated in an observational cohort study of 190 patients who completed all 42 sessions, typically within 2 months. About 64% responded to the program, with a 20 mm or greater symptom reduction on the Visual Analog Scale and median improvement of 33 mm. Participants also reported improvements in abdominal pain, bloating, dissatisfaction with stool consistency, flatulence, and nausea.

Results were reported as an abstract, and full findings from a formal randomized controlled trial aren’t yet available.
 

Patient and provider benefits

Although DTx tools are still in the early stages of development and validation, they can improve patient care and add value to a gastroenterologist’s practice, the authors write.

The products should undergo the same level of scientific rigor as pharmaceutical therapies, including randomized controlled trials in diverse patient groups, and patient data handling must be secure and transparent, the authors write. Cost analyses will be an important factor in clinical integration and adoption, they add.

“Change is inevitable, and the right change will bring benefits to providers and their patients,” Dr. Chey said. “Don’t be afraid of it, but do your due diligence before you embrace it. Our primer is intended to help providers conduct that due diligence.”

While behavioral health care is essential for many patients with IBS, there aren’t enough therapists with GI knowledge to meet the demand, Melissa Hunt, PhD, associate director of clinical training in psychology at the University of Pennsylvania, Philadelphia, said in an interview. The population prevalence of IBS is 6%, which means about 18 million people in the United States need guidance, she said.

Dr. Hunt, who wasn’t involved with this paper, has evaluated DTx options for patients with IBS, including the randomized controlled trial of Zemedy. Her research suggests that about 50% of IBS patients could benefit from self-help DTx.

“I get two to three new patient referrals a week and have a 6-month wait-list for my private practice,” Dr. Hunt said. “DTx is a cutting edge, evidence-based way to address the gaps in service and meet the needs of this population.”

The study didn’t receive any funding. The authors disclosed research, consultant, and leadership relationships with several companies not related to this report. Dr. Hunt declared no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Several digital therapeutics (DTx) – evidence-based interventions delivered via mobile app or Web-based platforms – could help patients with irritable bowel syndrome (IBS), according to a new review of available products.

These tools aren’t widely used by gastroenterologists yet, but the market is expected to grow broadly during the next decade.

“Digital therapeutics make so much sense and solve so many access issues,” coauthor William Chey, MD, chief of gastroenterology at the University of Michigan, Ann Arbor, said in an interview. “Because of this, their promise could easily outstrip their substance. We need to hold digital therapeutics companies accountable for proper evidence of benefit, so patients and doctors don’t end up chasing the latest shiny object.”

The review was published online in The American Journal of Gastroenterology.
 

Understanding the apps

IBS is most effectively treated with a combination of medications, diet changes, and behavioral interventions that are specific to the patient, the authors write. Cognitive behavioral therapy (CBT) and gut-directed hypnotherapy (GDH) have been effective at modifying behaviors and thought patterns, they add.

However, many gastroenterologists and their patients with IBS don’t have easy access to the mental health services component of integrated gastrointestinal (GI) care. DTx may offer a solution.

The review by Dr. Chey and colleagues is intended to serve as a primer for gastroenterologists about the current generation of DTx that provide virtual behavioral health interventions. For each product, they include a description of its services, evidence supporting its use, and other key information.

Mahana IBS, made by Mahana Therapeutics, is an FDA-approved, prescription-only CBT program for adults with IBS. The maximum out-of-pocket cost is $90. The product includes 10 sessions over 12 weeks.

Available as a mobile app or Web-based platform, Mahana IBS was validated in a randomized comparative effectiveness trial in a group of 558 patients, divided into three groups who received Web-based CBT, phone-based CBT, or treatment as usual. Before treatment, the mean IBS Symptom Severity Score for the entire group was 265.

At 12 weeks, the control group had an average reduction of 52.9 points, while the phone-based therapy group had a reduction of 133.3 points, and the Web-based therapy group had a reduction of 101.2 points. The average Work and Social Adjustment Scale (WSAS) decreased by an additional 3.5 points in the phone-based group and 3 points in the Web-based group, compared with the control group.

Zemedy, made by Bold Health, is a mobile app that provides virtual CBT through a chat bot for patients with IBS. It costs $19.49 per month or $154.99 per year. The app isn’t FDA-approved and doesn’t require a prescription.

The program includes six weekly psychoeducational modules with information about IBS and CBT, followed by CBT training modules. Users can chat with an automated system that provides computer-generated responses for support. A “flare module” supports patients when symptoms worsen.

Zemedy was evaluated in a crossover randomized controlled trial with 62 people in an active treatment group and 59 people in a wait-list control group. The app improved several measures, including self-reported IBS-quality of life, GI symptoms on the IBS rating scale, the Fear of Food Questionnaire, the Visceral Sensitivity Index, and the Depression Anxiety Stress Scale.

A larger clinical trial to validate the results is ongoing.

Regulora, made by metaMe Health, is an FDA-approved, prescription-only GDH program aimed at addressing abdominal pain related to IBS. The maximum out-of-pocket cost is $75. The protocols were developed by GI behavioral health researchers at the University of North Carolina at Chapel Hill. Available on a Web-based platform or as a mobile app, the program includes seven sessions of 30 minutes each over 12 weeks.

Regulora was evaluated in a randomized comparative effectiveness trial of 362 patients who used either this program or an app focused on muscle relaxation. The primary endpoint was the proportion of patients with a 30% or more reduction in abdominal pain intensity, and although the researchers found no significant difference between them, there was some relief. In the GDH group, 31% of participants reported a 30% or greater reduction in abdominal pain intensity, and 45% experienced a 30% or greater improvement in the proportion of stools with normal consistency.

The complete results of the trial still need to receive formal peer review and publication in a scientific journal.

Nerva, made by Mindset Health, is a GDH program delivered by mobile app or Web browser that costs $79.99 for 3 months. It isn’t FDA-approved and doesn’t require a prescription. The protocols were developed in collaboration with researchers from Monash University in Melbourne. The program features 6 weeks of daily sessions, psychoeducation readings, and breathing techniques.

Nerva was evaluated in an observational cohort study of 190 patients who completed all 42 sessions, typically within 2 months. About 64% responded to the program, with a 20 mm or greater symptom reduction on the Visual Analog Scale and median improvement of 33 mm. Participants also reported improvements in abdominal pain, bloating, dissatisfaction with stool consistency, flatulence, and nausea.

Results were reported as an abstract, and full findings from a formal randomized controlled trial aren’t yet available.
 

Patient and provider benefits

Although DTx tools are still in the early stages of development and validation, they can improve patient care and add value to a gastroenterologist’s practice, the authors write.

The products should undergo the same level of scientific rigor as pharmaceutical therapies, including randomized controlled trials in diverse patient groups, and patient data handling must be secure and transparent, the authors write. Cost analyses will be an important factor in clinical integration and adoption, they add.

“Change is inevitable, and the right change will bring benefits to providers and their patients,” Dr. Chey said. “Don’t be afraid of it, but do your due diligence before you embrace it. Our primer is intended to help providers conduct that due diligence.”

While behavioral health care is essential for many patients with IBS, there aren’t enough therapists with GI knowledge to meet the demand, Melissa Hunt, PhD, associate director of clinical training in psychology at the University of Pennsylvania, Philadelphia, said in an interview. The population prevalence of IBS is 6%, which means about 18 million people in the United States need guidance, she said.

Dr. Hunt, who wasn’t involved with this paper, has evaluated DTx options for patients with IBS, including the randomized controlled trial of Zemedy. Her research suggests that about 50% of IBS patients could benefit from self-help DTx.

“I get two to three new patient referrals a week and have a 6-month wait-list for my private practice,” Dr. Hunt said. “DTx is a cutting edge, evidence-based way to address the gaps in service and meet the needs of this population.”

The study didn’t receive any funding. The authors disclosed research, consultant, and leadership relationships with several companies not related to this report. Dr. Hunt declared no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Several digital therapeutics (DTx) – evidence-based interventions delivered via mobile app or Web-based platforms – could help patients with irritable bowel syndrome (IBS), according to a new review of available products.

These tools aren’t widely used by gastroenterologists yet, but the market is expected to grow broadly during the next decade.

“Digital therapeutics make so much sense and solve so many access issues,” coauthor William Chey, MD, chief of gastroenterology at the University of Michigan, Ann Arbor, said in an interview. “Because of this, their promise could easily outstrip their substance. We need to hold digital therapeutics companies accountable for proper evidence of benefit, so patients and doctors don’t end up chasing the latest shiny object.”

The review was published online in The American Journal of Gastroenterology.
 

Understanding the apps

IBS is most effectively treated with a combination of medications, diet changes, and behavioral interventions that are specific to the patient, the authors write. Cognitive behavioral therapy (CBT) and gut-directed hypnotherapy (GDH) have been effective at modifying behaviors and thought patterns, they add.

However, many gastroenterologists and their patients with IBS don’t have easy access to the mental health services component of integrated gastrointestinal (GI) care. DTx may offer a solution.

The review by Dr. Chey and colleagues is intended to serve as a primer for gastroenterologists about the current generation of DTx that provide virtual behavioral health interventions. For each product, they include a description of its services, evidence supporting its use, and other key information.

Mahana IBS, made by Mahana Therapeutics, is an FDA-approved, prescription-only CBT program for adults with IBS. The maximum out-of-pocket cost is $90. The product includes 10 sessions over 12 weeks.

Available as a mobile app or Web-based platform, Mahana IBS was validated in a randomized comparative effectiveness trial in a group of 558 patients, divided into three groups who received Web-based CBT, phone-based CBT, or treatment as usual. Before treatment, the mean IBS Symptom Severity Score for the entire group was 265.

At 12 weeks, the control group had an average reduction of 52.9 points, while the phone-based therapy group had a reduction of 133.3 points, and the Web-based therapy group had a reduction of 101.2 points. The average Work and Social Adjustment Scale (WSAS) decreased by an additional 3.5 points in the phone-based group and 3 points in the Web-based group, compared with the control group.

Zemedy, made by Bold Health, is a mobile app that provides virtual CBT through a chat bot for patients with IBS. It costs $19.49 per month or $154.99 per year. The app isn’t FDA-approved and doesn’t require a prescription.

The program includes six weekly psychoeducational modules with information about IBS and CBT, followed by CBT training modules. Users can chat with an automated system that provides computer-generated responses for support. A “flare module” supports patients when symptoms worsen.

Zemedy was evaluated in a crossover randomized controlled trial with 62 people in an active treatment group and 59 people in a wait-list control group. The app improved several measures, including self-reported IBS-quality of life, GI symptoms on the IBS rating scale, the Fear of Food Questionnaire, the Visceral Sensitivity Index, and the Depression Anxiety Stress Scale.

A larger clinical trial to validate the results is ongoing.

Regulora, made by metaMe Health, is an FDA-approved, prescription-only GDH program aimed at addressing abdominal pain related to IBS. The maximum out-of-pocket cost is $75. The protocols were developed by GI behavioral health researchers at the University of North Carolina at Chapel Hill. Available on a Web-based platform or as a mobile app, the program includes seven sessions of 30 minutes each over 12 weeks.

Regulora was evaluated in a randomized comparative effectiveness trial of 362 patients who used either this program or an app focused on muscle relaxation. The primary endpoint was the proportion of patients with a 30% or more reduction in abdominal pain intensity, and although the researchers found no significant difference between them, there was some relief. In the GDH group, 31% of participants reported a 30% or greater reduction in abdominal pain intensity, and 45% experienced a 30% or greater improvement in the proportion of stools with normal consistency.

The complete results of the trial still need to receive formal peer review and publication in a scientific journal.

Nerva, made by Mindset Health, is a GDH program delivered by mobile app or Web browser that costs $79.99 for 3 months. It isn’t FDA-approved and doesn’t require a prescription. The protocols were developed in collaboration with researchers from Monash University in Melbourne. The program features 6 weeks of daily sessions, psychoeducation readings, and breathing techniques.

Nerva was evaluated in an observational cohort study of 190 patients who completed all 42 sessions, typically within 2 months. About 64% responded to the program, with a 20 mm or greater symptom reduction on the Visual Analog Scale and median improvement of 33 mm. Participants also reported improvements in abdominal pain, bloating, dissatisfaction with stool consistency, flatulence, and nausea.

Results were reported as an abstract, and full findings from a formal randomized controlled trial aren’t yet available.
 

Patient and provider benefits

Although DTx tools are still in the early stages of development and validation, they can improve patient care and add value to a gastroenterologist’s practice, the authors write.

The products should undergo the same level of scientific rigor as pharmaceutical therapies, including randomized controlled trials in diverse patient groups, and patient data handling must be secure and transparent, the authors write. Cost analyses will be an important factor in clinical integration and adoption, they add.

“Change is inevitable, and the right change will bring benefits to providers and their patients,” Dr. Chey said. “Don’t be afraid of it, but do your due diligence before you embrace it. Our primer is intended to help providers conduct that due diligence.”

While behavioral health care is essential for many patients with IBS, there aren’t enough therapists with GI knowledge to meet the demand, Melissa Hunt, PhD, associate director of clinical training in psychology at the University of Pennsylvania, Philadelphia, said in an interview. The population prevalence of IBS is 6%, which means about 18 million people in the United States need guidance, she said.

Dr. Hunt, who wasn’t involved with this paper, has evaluated DTx options for patients with IBS, including the randomized controlled trial of Zemedy. Her research suggests that about 50% of IBS patients could benefit from self-help DTx.

“I get two to three new patient referrals a week and have a 6-month wait-list for my private practice,” Dr. Hunt said. “DTx is a cutting edge, evidence-based way to address the gaps in service and meet the needs of this population.”

The study didn’t receive any funding. The authors disclosed research, consultant, and leadership relationships with several companies not related to this report. Dr. Hunt declared no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Ayahuasca is a psychoactive beverage that has long been used by indigenous people in South America in religious ceremonies and tribal rituals. In recent years, the beverage has emerged as a strong candidate for implementation into psychiatric care, particularly for patients with treatment-resistant depression.

Studies have shown that taking ayahuasca is associated with an improvement of depressive symptoms. In a study published in Frontiers in Psychiatry, a team of researchers from Brazil’s Federal University of Rio Grande do Norte (UFRN) describe an experimental ayahuasca session. They found that specific emotional and physiologic parameters were critical moderators of improvement in major depression biomarkers, mainly serum brain-derived neurotrophic factor (BDNF) and serum cortisol (SC), 2 days after ayahuasca intake.

Nicole Leite Galvão-Coelho, PhD, professor of physiology and behavior at UFRN, is one of the authors of that study. She is also a researcher at the NICM Health Research Institute at Western Sydney University. Dr. Galvão-Coelho spoke with this news organization about her team’s work.

A total of 72 people volunteered to participate in the study. There were 28 patients, all of whom were experiencing a moderate to severe depressive episode at screening. In addition, they had been diagnosed with treatment-resistant depression and had not achieved remission after at least two treatments with antidepressant medications of different classes. These patients had been experiencing depression for about 10.71 ± 9.72 years. The other 44 volunteers were healthy control participants. All the participants – both in the patient group and the control group – were naive to any classic serotonergic psychedelic such as ayahuasca.

In each group, half received ayahuasca, and the other half received a placebo. The dosing session was performed at UFRN’s Onofre Lopes University Hospital and lasted about 8 hours.

All volunteers underwent a full clinical mental health evaluation and medical history. Blood and saliva samples were collected at baseline, approximately 4 hours before the dosing session, and 2 days after the dosing session. During the dosing session, saliva samples were collected at 1 hour 40 minutes, 2 hours 40 minutes, and 4 hours after ayahuasca intake.

The study showed that some acute measures assessed during ayahuasca dosing moderated the improvements in major depressive disorder (MDD) biomarkers 2 days after the session in patients with treatment-resistant depression. Larger acute decreases of depressive symptoms moderated higher levels of SC in those patients, while lower acute changes in SC levels were related to higher BDNF levels in patients with a larger clinical response.

The UFRN research team has been investigating the potential antidepressant effects of ayahuasca for approximately 12 years. According to Dr. Galvão-Coelho, the work reported in the most recent article – one in a series of articles that they wrote – provides a step forward as a pioneering psychedelic field study assessing the biological changes of MDD molecular biomarkers. “There have indeed been observational studies and open-label clinical studies. We were the first team, though, to conduct placebo-controlled clinical studies with ayahuasca in patients with treatment-resistant depression,” she explained. She noted that the work was carried out in partnership with Dráulio Barros de Araújo, PhD, a professor at UFRN’s Brain Institute, as well as with a multidisciplinary team of researchers in Brazil and Australia.

Dr. Galvão-Coelho said that in an earlier study, the UFRN researchers observed that a single dose of ayahuasca led to long-lasting behavioral and physiologic improvements in an animal (marmoset) model. In another study, there was improvement in depression severity for patients with treatment-resistant depression 7 days after taking ayahuasca.

As for biomarkers, Dr. Galvão-Coelho said that there is a long history of research on cortisol (the “stress hormone”) with respect to patients with depressive symptoms, given the link between chronic stress and depressive disorders. “In our patients with treatment-resistant depression, we found that before being dosed with ayahuasca, they presented hypocortisolemia,” she said. She noted that low levels of cortisol are as harmful to one’s health as high levels. According to her, the goal should be to sustain moderate levels. “In other studies, we’ve shown that patients with more recent, less chronic depression have high cortisol levels, but after a little while, the [adrenal] glands get overworked, which seems to lead to a situation where they’re not producing all those important hormones. That’s why chronic conditions of depression are marked by low levels of cortisol. But,” she pointed out, “after patients with treatment-resistant depression take ayahuasca, we no longer see hypocortisolemia.”

Another biomarker analyzed by the research team, the protein BDNF, has the capacity to induce neuroplasticity. Indeed, Dr. Galvão-Coelho mentioned a theory that antidepressant drugs work when they increase levels of this protein, which would stimulate new connections in the brain.

Because several earlier studies indicated that other psychedelic substances would promote an increase in BDNF, the UFRN researchers decided to explore the potential effects of ayahuasca on this biomarker. “We observed that there was actually an increase in serum BDNF, and the patients who showed the greatest increase [of this marker] had a more significant reduction in depressive symptoms,” Dr. Galvão-Coelho explained.

Considering all the previous findings, the team wondered whether acute parameters recorded during an ayahuasca dosing session could in some way modulate the responses of certain key MDD molecular biomarkers. They then conducted their study that was published last December.

Dr. Galvão-Coelho said that the results of that study show that acute emotional and physiologic effects of ayahuasca seem to be relevant to an improvement of key MDD molecular biomarkers (namely, SC and BDNF). She also noted that the results revealed that larger reductions of depressive symptoms during the dosing session significantly moderated higher levels of SC in patients 2 days after ayahuasca intake. In the case of BDNF, the positive correlation between clinical response and day-2 BDNF levels only occurred for patients who experienced small increases of cortisol during the experimental session. These were individuals who did not have such an intense response to stress and who felt more at ease during the session.

The findings showed which factors that arise during the psychedelic state induced by ayahuasca modulate biological response associated with the antidepressant action of these substances in patients with major depression. “We realized, for example, that to bring about a sense of comfort and trust, to get a good acute response, the dosing session had to be extremely well thought out. That seemed to be relevant to the results on the other days,” Dr. Galvão-Coelho explained.

For her, there was another takeaway from the research: New antidepressant treatments should be complemented by a more comprehensive view of the case at hand. “We have to think about the patient’s overall improvement – including, therefore, the improvement of biomarkers – and not focus solely on the clinical symptoms.”

This article was translated from the Medscape Portuguese Edition.

A version of this article first appeared on Medscape.com.

Ayahuasca is a psychoactive beverage that has long been used by indigenous people in South America in religious ceremonies and tribal rituals. In recent years, the beverage has emerged as a strong candidate for implementation into psychiatric care, particularly for patients with treatment-resistant depression.

Studies have shown that taking ayahuasca is associated with an improvement of depressive symptoms. In a study published in Frontiers in Psychiatry, a team of researchers from Brazil’s Federal University of Rio Grande do Norte (UFRN) describe an experimental ayahuasca session. They found that specific emotional and physiologic parameters were critical moderators of improvement in major depression biomarkers, mainly serum brain-derived neurotrophic factor (BDNF) and serum cortisol (SC), 2 days after ayahuasca intake.

Nicole Leite Galvão-Coelho, PhD, professor of physiology and behavior at UFRN, is one of the authors of that study. She is also a researcher at the NICM Health Research Institute at Western Sydney University. Dr. Galvão-Coelho spoke with this news organization about her team’s work.

A total of 72 people volunteered to participate in the study. There were 28 patients, all of whom were experiencing a moderate to severe depressive episode at screening. In addition, they had been diagnosed with treatment-resistant depression and had not achieved remission after at least two treatments with antidepressant medications of different classes. These patients had been experiencing depression for about 10.71 ± 9.72 years. The other 44 volunteers were healthy control participants. All the participants – both in the patient group and the control group – were naive to any classic serotonergic psychedelic such as ayahuasca.

In each group, half received ayahuasca, and the other half received a placebo. The dosing session was performed at UFRN’s Onofre Lopes University Hospital and lasted about 8 hours.

All volunteers underwent a full clinical mental health evaluation and medical history. Blood and saliva samples were collected at baseline, approximately 4 hours before the dosing session, and 2 days after the dosing session. During the dosing session, saliva samples were collected at 1 hour 40 minutes, 2 hours 40 minutes, and 4 hours after ayahuasca intake.

The study showed that some acute measures assessed during ayahuasca dosing moderated the improvements in major depressive disorder (MDD) biomarkers 2 days after the session in patients with treatment-resistant depression. Larger acute decreases of depressive symptoms moderated higher levels of SC in those patients, while lower acute changes in SC levels were related to higher BDNF levels in patients with a larger clinical response.

The UFRN research team has been investigating the potential antidepressant effects of ayahuasca for approximately 12 years. According to Dr. Galvão-Coelho, the work reported in the most recent article – one in a series of articles that they wrote – provides a step forward as a pioneering psychedelic field study assessing the biological changes of MDD molecular biomarkers. “There have indeed been observational studies and open-label clinical studies. We were the first team, though, to conduct placebo-controlled clinical studies with ayahuasca in patients with treatment-resistant depression,” she explained. She noted that the work was carried out in partnership with Dráulio Barros de Araújo, PhD, a professor at UFRN’s Brain Institute, as well as with a multidisciplinary team of researchers in Brazil and Australia.

Dr. Galvão-Coelho said that in an earlier study, the UFRN researchers observed that a single dose of ayahuasca led to long-lasting behavioral and physiologic improvements in an animal (marmoset) model. In another study, there was improvement in depression severity for patients with treatment-resistant depression 7 days after taking ayahuasca.

As for biomarkers, Dr. Galvão-Coelho said that there is a long history of research on cortisol (the “stress hormone”) with respect to patients with depressive symptoms, given the link between chronic stress and depressive disorders. “In our patients with treatment-resistant depression, we found that before being dosed with ayahuasca, they presented hypocortisolemia,” she said. She noted that low levels of cortisol are as harmful to one’s health as high levels. According to her, the goal should be to sustain moderate levels. “In other studies, we’ve shown that patients with more recent, less chronic depression have high cortisol levels, but after a little while, the [adrenal] glands get overworked, which seems to lead to a situation where they’re not producing all those important hormones. That’s why chronic conditions of depression are marked by low levels of cortisol. But,” she pointed out, “after patients with treatment-resistant depression take ayahuasca, we no longer see hypocortisolemia.”

Another biomarker analyzed by the research team, the protein BDNF, has the capacity to induce neuroplasticity. Indeed, Dr. Galvão-Coelho mentioned a theory that antidepressant drugs work when they increase levels of this protein, which would stimulate new connections in the brain.

Because several earlier studies indicated that other psychedelic substances would promote an increase in BDNF, the UFRN researchers decided to explore the potential effects of ayahuasca on this biomarker. “We observed that there was actually an increase in serum BDNF, and the patients who showed the greatest increase [of this marker] had a more significant reduction in depressive symptoms,” Dr. Galvão-Coelho explained.

Considering all the previous findings, the team wondered whether acute parameters recorded during an ayahuasca dosing session could in some way modulate the responses of certain key MDD molecular biomarkers. They then conducted their study that was published last December.

Dr. Galvão-Coelho said that the results of that study show that acute emotional and physiologic effects of ayahuasca seem to be relevant to an improvement of key MDD molecular biomarkers (namely, SC and BDNF). She also noted that the results revealed that larger reductions of depressive symptoms during the dosing session significantly moderated higher levels of SC in patients 2 days after ayahuasca intake. In the case of BDNF, the positive correlation between clinical response and day-2 BDNF levels only occurred for patients who experienced small increases of cortisol during the experimental session. These were individuals who did not have such an intense response to stress and who felt more at ease during the session.

The findings showed which factors that arise during the psychedelic state induced by ayahuasca modulate biological response associated with the antidepressant action of these substances in patients with major depression. “We realized, for example, that to bring about a sense of comfort and trust, to get a good acute response, the dosing session had to be extremely well thought out. That seemed to be relevant to the results on the other days,” Dr. Galvão-Coelho explained.

For her, there was another takeaway from the research: New antidepressant treatments should be complemented by a more comprehensive view of the case at hand. “We have to think about the patient’s overall improvement – including, therefore, the improvement of biomarkers – and not focus solely on the clinical symptoms.”

This article was translated from the Medscape Portuguese Edition.

A version of this article first appeared on Medscape.com.

Ayahuasca is a psychoactive beverage that has long been used by indigenous people in South America in religious ceremonies and tribal rituals. In recent years, the beverage has emerged as a strong candidate for implementation into psychiatric care, particularly for patients with treatment-resistant depression.

Studies have shown that taking ayahuasca is associated with an improvement of depressive symptoms. In a study published in Frontiers in Psychiatry, a team of researchers from Brazil’s Federal University of Rio Grande do Norte (UFRN) describe an experimental ayahuasca session. They found that specific emotional and physiologic parameters were critical moderators of improvement in major depression biomarkers, mainly serum brain-derived neurotrophic factor (BDNF) and serum cortisol (SC), 2 days after ayahuasca intake.

Nicole Leite Galvão-Coelho, PhD, professor of physiology and behavior at UFRN, is one of the authors of that study. She is also a researcher at the NICM Health Research Institute at Western Sydney University. Dr. Galvão-Coelho spoke with this news organization about her team’s work.

A total of 72 people volunteered to participate in the study. There were 28 patients, all of whom were experiencing a moderate to severe depressive episode at screening. In addition, they had been diagnosed with treatment-resistant depression and had not achieved remission after at least two treatments with antidepressant medications of different classes. These patients had been experiencing depression for about 10.71 ± 9.72 years. The other 44 volunteers were healthy control participants. All the participants – both in the patient group and the control group – were naive to any classic serotonergic psychedelic such as ayahuasca.

In each group, half received ayahuasca, and the other half received a placebo. The dosing session was performed at UFRN’s Onofre Lopes University Hospital and lasted about 8 hours.

All volunteers underwent a full clinical mental health evaluation and medical history. Blood and saliva samples were collected at baseline, approximately 4 hours before the dosing session, and 2 days after the dosing session. During the dosing session, saliva samples were collected at 1 hour 40 minutes, 2 hours 40 minutes, and 4 hours after ayahuasca intake.

The study showed that some acute measures assessed during ayahuasca dosing moderated the improvements in major depressive disorder (MDD) biomarkers 2 days after the session in patients with treatment-resistant depression. Larger acute decreases of depressive symptoms moderated higher levels of SC in those patients, while lower acute changes in SC levels were related to higher BDNF levels in patients with a larger clinical response.

The UFRN research team has been investigating the potential antidepressant effects of ayahuasca for approximately 12 years. According to Dr. Galvão-Coelho, the work reported in the most recent article – one in a series of articles that they wrote – provides a step forward as a pioneering psychedelic field study assessing the biological changes of MDD molecular biomarkers. “There have indeed been observational studies and open-label clinical studies. We were the first team, though, to conduct placebo-controlled clinical studies with ayahuasca in patients with treatment-resistant depression,” she explained. She noted that the work was carried out in partnership with Dráulio Barros de Araújo, PhD, a professor at UFRN’s Brain Institute, as well as with a multidisciplinary team of researchers in Brazil and Australia.

Dr. Galvão-Coelho said that in an earlier study, the UFRN researchers observed that a single dose of ayahuasca led to long-lasting behavioral and physiologic improvements in an animal (marmoset) model. In another study, there was improvement in depression severity for patients with treatment-resistant depression 7 days after taking ayahuasca.

As for biomarkers, Dr. Galvão-Coelho said that there is a long history of research on cortisol (the “stress hormone”) with respect to patients with depressive symptoms, given the link between chronic stress and depressive disorders. “In our patients with treatment-resistant depression, we found that before being dosed with ayahuasca, they presented hypocortisolemia,” she said. She noted that low levels of cortisol are as harmful to one’s health as high levels. According to her, the goal should be to sustain moderate levels. “In other studies, we’ve shown that patients with more recent, less chronic depression have high cortisol levels, but after a little while, the [adrenal] glands get overworked, which seems to lead to a situation where they’re not producing all those important hormones. That’s why chronic conditions of depression are marked by low levels of cortisol. But,” she pointed out, “after patients with treatment-resistant depression take ayahuasca, we no longer see hypocortisolemia.”

Another biomarker analyzed by the research team, the protein BDNF, has the capacity to induce neuroplasticity. Indeed, Dr. Galvão-Coelho mentioned a theory that antidepressant drugs work when they increase levels of this protein, which would stimulate new connections in the brain.

Because several earlier studies indicated that other psychedelic substances would promote an increase in BDNF, the UFRN researchers decided to explore the potential effects of ayahuasca on this biomarker. “We observed that there was actually an increase in serum BDNF, and the patients who showed the greatest increase [of this marker] had a more significant reduction in depressive symptoms,” Dr. Galvão-Coelho explained.

Considering all the previous findings, the team wondered whether acute parameters recorded during an ayahuasca dosing session could in some way modulate the responses of certain key MDD molecular biomarkers. They then conducted their study that was published last December.

Dr. Galvão-Coelho said that the results of that study show that acute emotional and physiologic effects of ayahuasca seem to be relevant to an improvement of key MDD molecular biomarkers (namely, SC and BDNF). She also noted that the results revealed that larger reductions of depressive symptoms during the dosing session significantly moderated higher levels of SC in patients 2 days after ayahuasca intake. In the case of BDNF, the positive correlation between clinical response and day-2 BDNF levels only occurred for patients who experienced small increases of cortisol during the experimental session. These were individuals who did not have such an intense response to stress and who felt more at ease during the session.

The findings showed which factors that arise during the psychedelic state induced by ayahuasca modulate biological response associated with the antidepressant action of these substances in patients with major depression. “We realized, for example, that to bring about a sense of comfort and trust, to get a good acute response, the dosing session had to be extremely well thought out. That seemed to be relevant to the results on the other days,” Dr. Galvão-Coelho explained.

For her, there was another takeaway from the research: New antidepressant treatments should be complemented by a more comprehensive view of the case at hand. “We have to think about the patient’s overall improvement – including, therefore, the improvement of biomarkers – and not focus solely on the clinical symptoms.”

This article was translated from the Medscape Portuguese Edition.

A version of this article first appeared on Medscape.com.

Adding simvastatin to standard therapy offers no benefit over placebo for patients with treatment-resistant depression (TRD), new research shows.

The randomized clinical trial findings contradict earlier, smaller studies in patients with major depressive disorder (MDD) that suggested statins may reduce symptoms.

“Given the promising results from preliminary trials of statins in MDD, I was surprised that simvastatin did not separate from placebo in our trial,” lead author M. Ishrat Husain, MBBS, MD, associate professor of psychiatry and scientific head of the Centre for Addiction and Mental Health Clinical Trials Unit at the University of Toronto, told this news organization.

“I believe that our findings suggest that statins are not effective augmentation strategies in treatment-resistant depression,” Dr. Husain said.

The findings were published online in JAMA Network Open.
 

Disappointing results

The double-blind, placebo-controlled randomized clinical trial was conducted in five centers in Pakistan and included 150 patients with major depressive episode whose symptoms did not improve after treatment with at least two antidepressants.

In addition to their prescribed antidepressants, participants received 20 mg/day of simvastatin (n = 77) or placebo (n = 73).

At 12 weeks, both groups reported improvements in Montgomery-Åsberg Depression Rating Scale total scores, but there was no significant difference between groups. The estimated mean difference for simvastatin vs. placebo was −0.61 (P = .7).

Researchers found similar results when they compared scores from the Generalized Anxiety Disorder Scale and Morisky Medication Adherence Scale.

“Much like several other studies in mood disorders, our study results were impacted by a large placebo response,” Dr. Husain said.

The lack of inclusion of any participants under the age of 18 and the single-country cohort were limitations of the trial. Although it is possible that could have affected the outcome, Dr. Husain said it isn’t likely.

It is also unlikely that a different statin would yield different results, he added.

“Simvastatin was selected as it is believed to be most brain penetrant of the statins given its lipophilicity,” Dr. Husain said. “Clinical trials of other statins in major depressive disorder in other settings and populations have also been congruent with our results.”

The study was funded by NIHR Biomedical Research Centre at South London and Maudsley National Health Service Foundation Trust and King’s College London. Dr. Husain reports having received grants from Compass Pathways, holds stock options in Mindset, and previously served on the Board of Trustees of the Pakistan Institute of Living and Learning. Disclosures for the other investigators are fully listed in the original article.

A version of this article first appeared on Medscape.com.

Adding simvastatin to standard therapy offers no benefit over placebo for patients with treatment-resistant depression (TRD), new research shows.

The randomized clinical trial findings contradict earlier, smaller studies in patients with major depressive disorder (MDD) that suggested statins may reduce symptoms.

“Given the promising results from preliminary trials of statins in MDD, I was surprised that simvastatin did not separate from placebo in our trial,” lead author M. Ishrat Husain, MBBS, MD, associate professor of psychiatry and scientific head of the Centre for Addiction and Mental Health Clinical Trials Unit at the University of Toronto, told this news organization.

“I believe that our findings suggest that statins are not effective augmentation strategies in treatment-resistant depression,” Dr. Husain said.

The findings were published online in JAMA Network Open.
 

Disappointing results

The double-blind, placebo-controlled randomized clinical trial was conducted in five centers in Pakistan and included 150 patients with major depressive episode whose symptoms did not improve after treatment with at least two antidepressants.

In addition to their prescribed antidepressants, participants received 20 mg/day of simvastatin (n = 77) or placebo (n = 73).

At 12 weeks, both groups reported improvements in Montgomery-Åsberg Depression Rating Scale total scores, but there was no significant difference between groups. The estimated mean difference for simvastatin vs. placebo was −0.61 (P = .7).

Researchers found similar results when they compared scores from the Generalized Anxiety Disorder Scale and Morisky Medication Adherence Scale.

“Much like several other studies in mood disorders, our study results were impacted by a large placebo response,” Dr. Husain said.

The lack of inclusion of any participants under the age of 18 and the single-country cohort were limitations of the trial. Although it is possible that could have affected the outcome, Dr. Husain said it isn’t likely.

It is also unlikely that a different statin would yield different results, he added.

“Simvastatin was selected as it is believed to be most brain penetrant of the statins given its lipophilicity,” Dr. Husain said. “Clinical trials of other statins in major depressive disorder in other settings and populations have also been congruent with our results.”

The study was funded by NIHR Biomedical Research Centre at South London and Maudsley National Health Service Foundation Trust and King’s College London. Dr. Husain reports having received grants from Compass Pathways, holds stock options in Mindset, and previously served on the Board of Trustees of the Pakistan Institute of Living and Learning. Disclosures for the other investigators are fully listed in the original article.

A version of this article first appeared on Medscape.com.

Adding simvastatin to standard therapy offers no benefit over placebo for patients with treatment-resistant depression (TRD), new research shows.

The randomized clinical trial findings contradict earlier, smaller studies in patients with major depressive disorder (MDD) that suggested statins may reduce symptoms.

“Given the promising results from preliminary trials of statins in MDD, I was surprised that simvastatin did not separate from placebo in our trial,” lead author M. Ishrat Husain, MBBS, MD, associate professor of psychiatry and scientific head of the Centre for Addiction and Mental Health Clinical Trials Unit at the University of Toronto, told this news organization.

“I believe that our findings suggest that statins are not effective augmentation strategies in treatment-resistant depression,” Dr. Husain said.

The findings were published online in JAMA Network Open.
 

Disappointing results

The double-blind, placebo-controlled randomized clinical trial was conducted in five centers in Pakistan and included 150 patients with major depressive episode whose symptoms did not improve after treatment with at least two antidepressants.

In addition to their prescribed antidepressants, participants received 20 mg/day of simvastatin (n = 77) or placebo (n = 73).

At 12 weeks, both groups reported improvements in Montgomery-Åsberg Depression Rating Scale total scores, but there was no significant difference between groups. The estimated mean difference for simvastatin vs. placebo was −0.61 (P = .7).

Researchers found similar results when they compared scores from the Generalized Anxiety Disorder Scale and Morisky Medication Adherence Scale.

“Much like several other studies in mood disorders, our study results were impacted by a large placebo response,” Dr. Husain said.

The lack of inclusion of any participants under the age of 18 and the single-country cohort were limitations of the trial. Although it is possible that could have affected the outcome, Dr. Husain said it isn’t likely.

It is also unlikely that a different statin would yield different results, he added.

“Simvastatin was selected as it is believed to be most brain penetrant of the statins given its lipophilicity,” Dr. Husain said. “Clinical trials of other statins in major depressive disorder in other settings and populations have also been congruent with our results.”

The study was funded by NIHR Biomedical Research Centre at South London and Maudsley National Health Service Foundation Trust and King’s College London. Dr. Husain reports having received grants from Compass Pathways, holds stock options in Mindset, and previously served on the Board of Trustees of the Pakistan Institute of Living and Learning. Disclosures for the other investigators are fully listed in the original article.

A version of this article first appeared on Medscape.com.

The Diagnosis: Plasmablastic Lymphoma

A punch biopsy of one of the leg nodules with hematoxylin and eosin staining revealed sheets of medium to large cells with plasmacytic differentiation (Figure, A and B). Immunohistochemistry showed CD79, epithelial membrane antigen, multiple myeloma 1, and CD138 positivity, as well as CD-19 negativity and positive staining on Epstein-Barr virus (EBV) in situ hybridization (Figure, C). Ki-67 stained greater than 90% of the neoplastic cells. Neoplastic cells were found to be λ restricted on κ and λ immunohistochemistry. Human herpesvirus 8 (HHV-8), CD3, and CD20 stains were negative. Subsequent fluorescent in situ hybridization was positive for MYC/immunoglobulin heavy chain (MYC/IGH) rearrangement t(8;14), confirming a diagnosis of plasmablastic lymphoma (PBL).

A bone marrow biopsy revealed normocellular bone marrow with trilineage hematopoiesis and no morphologic, immunophenotypic, or fluorescent in situ hybridization evidence of plasmablastic lymphoma or other pathology in the bone marrow. Our patient was started on hyper-CVAD (cyclophosphamide, vincristine, doxorubicin hydrochloride, dexamethasone) chemotherapy and was doing well with plans for a fourth course of chemotherapy. There is no standardized treatment course for cutaneous PBL, though excision with adjunctive chemotherapy treatment commonly has been reported in the literature.¹

Plasmablastic lymphoma is a rare and aggressive diffuse large B-cell lymphoma associated with EBV infection that compromises approximately 2% to 3% of all HIV-related lymphomas.^1,2 It frequently is associated with immunosuppression in patients with HIV or in transplant recipients on immunosuppression; however, it has been reported in immunocompetent individuals such as elderly patients.² Plasmablastic lymphoma most commonly presents on the buccal mucosa but also can affect the gastrointestinal tract and occasionally has cutaneous manifestations.^1,2 Cutaneous manifestations of PBL range from erythematous infiltrated plaques to ulcerated nodules presenting in an array of colors from flesh colored to violaceous.² Primary cutaneous lesions can be seen on the legs, as in our patient.

Histopathologic examination reveals sheets of plasmablasts or large cells with eccentric nuclei and abundant basophilic cytoplasm.¹ Plasmablastic lymphoma frequently is positive for mature B-cell markers such as CD38, CD138, multiple myeloma 1, and B lymphocyte–induced maturation protein 1.^2,3 Uncommonly, PBL expresses paired box protein Pax-5 and CD20 markers.³ Although pathogenesis is poorly understood, it has been speculated that EBV infection is a common pathogenic factor. Epstein-Barr virus positivity has been noted in 60% of cases.²

Plasmablastic lymphoma and other malignant plasma cell processes such as plasmablastic myeloma (PBM) are morphologically similar. Proliferation of plasmablasts with rare plasmacytic cells is common in PBL, while plasmacytic cells are predominant in PBM. MYC rearrangement/ immunoglobulin heavy chain rearrangement t(8;14) was used to differentiate PBL from PBM in our patient; however, more cases of PBM with MYC/IGH rearrangement t(8;14) have been reported, making it an unreliable differentiating factor.⁴ A detailed clinical, pathologic, and genetic survey remains necessary for confirmatory diagnosis of PBL. Compared to other malignant plasma cell processes, PBL more commonly is seen in immunocompromised patients or those with HIV, such as our patient. Additionally, EBV testing is more likely to be positive in patients with PBL, further supporting this diagnosis in our patient.⁴

Presentations of bacillary angiomatosis, Kaposi sarcoma, and cutaneous lymphoma may be clinically similar; therefore, careful immunohistopathologic differentiation is necessary. Kaposi sarcoma is an angioproliferative disorder that develops from HHV-8 infection and commonly is associated with HIV. It presents as painless vascular lesions in a range of colors with typical progression from patch to plaque to nodules, frequently on the lower extremities. Histologically, admixtures of bland spindle cells, slitlike small vessel proliferation, and lymphocytic infiltration are typical. Neoplastic vessels lack basement membrane zones, resulting in microhemorrhages and hemosiderin deposition. Neoplastic vessels label with CD31 and CD34 endothelial markers in addition to HHV-8 antibodies, which is highly specific for Kaposi sarcoma and differentiates it from PBL.⁵

Bacillary angiomatosis is an infectious neovascular proliferation characterized by papular lesions that may resemble the lesions of PBL. Mixed cell infiltration in inflammatory cells with clumping of granular material is characteristic. Under Warthin-Starry staining, the granular material is abundant in gram-negative rods representing Bartonella species, which is the implicated infectious agent in bacillary angiomatosis.

Lymphomatoid papulosis (LyP) is the most common CD30+ lymphoproliferative disorder and also may present with exophytic nodules. The etiology of LyP remains unknown, but it is suspected that overexpression of CD30 plays a role. Lymphomatoid papulosis presents as red-violaceous papules and nodules in various stages of healing. Although variable histology among types of LyP exists, CD30+ T-cell lymphocytes remain the hallmark of LyP. Type A LyP, which accounts for 80% of LyP cases, reveals CD4+ and CD30+ cells scattered among neutrophils, eosinophils, and small lymphocytes.5 Lymphomatoid papulosis typically is self-healing, recurrent, and carries an excellent prognosis.

Plasmablastic lymphoma remains a rare and aggressive type of diffuse large B-cell lymphoma that can have primary cutaneous manifestations. It is prudent to consider PBL in the differential diagnosis of nodular lower extremity lesions, especially in immunosuppressed patients.

The Diagnosis: Plasmablastic Lymphoma

A punch biopsy of one of the leg nodules with hematoxylin and eosin staining revealed sheets of medium to large cells with plasmacytic differentiation (Figure, A and B). Immunohistochemistry showed CD79, epithelial membrane antigen, multiple myeloma 1, and CD138 positivity, as well as CD-19 negativity and positive staining on Epstein-Barr virus (EBV) in situ hybridization (Figure, C). Ki-67 stained greater than 90% of the neoplastic cells. Neoplastic cells were found to be λ restricted on κ and λ immunohistochemistry. Human herpesvirus 8 (HHV-8), CD3, and CD20 stains were negative. Subsequent fluorescent in situ hybridization was positive for MYC/immunoglobulin heavy chain (MYC/IGH) rearrangement t(8;14), confirming a diagnosis of plasmablastic lymphoma (PBL).

A bone marrow biopsy revealed normocellular bone marrow with trilineage hematopoiesis and no morphologic, immunophenotypic, or fluorescent in situ hybridization evidence of plasmablastic lymphoma or other pathology in the bone marrow. Our patient was started on hyper-CVAD (cyclophosphamide, vincristine, doxorubicin hydrochloride, dexamethasone) chemotherapy and was doing well with plans for a fourth course of chemotherapy. There is no standardized treatment course for cutaneous PBL, though excision with adjunctive chemotherapy treatment commonly has been reported in the literature.¹

Plasmablastic lymphoma is a rare and aggressive diffuse large B-cell lymphoma associated with EBV infection that compromises approximately 2% to 3% of all HIV-related lymphomas.^1,2 It frequently is associated with immunosuppression in patients with HIV or in transplant recipients on immunosuppression; however, it has been reported in immunocompetent individuals such as elderly patients.² Plasmablastic lymphoma most commonly presents on the buccal mucosa but also can affect the gastrointestinal tract and occasionally has cutaneous manifestations.^1,2 Cutaneous manifestations of PBL range from erythematous infiltrated plaques to ulcerated nodules presenting in an array of colors from flesh colored to violaceous.² Primary cutaneous lesions can be seen on the legs, as in our patient.

Histopathologic examination reveals sheets of plasmablasts or large cells with eccentric nuclei and abundant basophilic cytoplasm.¹ Plasmablastic lymphoma frequently is positive for mature B-cell markers such as CD38, CD138, multiple myeloma 1, and B lymphocyte–induced maturation protein 1.^2,3 Uncommonly, PBL expresses paired box protein Pax-5 and CD20 markers.³ Although pathogenesis is poorly understood, it has been speculated that EBV infection is a common pathogenic factor. Epstein-Barr virus positivity has been noted in 60% of cases.²

Plasmablastic lymphoma and other malignant plasma cell processes such as plasmablastic myeloma (PBM) are morphologically similar. Proliferation of plasmablasts with rare plasmacytic cells is common in PBL, while plasmacytic cells are predominant in PBM. MYC rearrangement/ immunoglobulin heavy chain rearrangement t(8;14) was used to differentiate PBL from PBM in our patient; however, more cases of PBM with MYC/IGH rearrangement t(8;14) have been reported, making it an unreliable differentiating factor.⁴ A detailed clinical, pathologic, and genetic survey remains necessary for confirmatory diagnosis of PBL. Compared to other malignant plasma cell processes, PBL more commonly is seen in immunocompromised patients or those with HIV, such as our patient. Additionally, EBV testing is more likely to be positive in patients with PBL, further supporting this diagnosis in our patient.⁴

Presentations of bacillary angiomatosis, Kaposi sarcoma, and cutaneous lymphoma may be clinically similar; therefore, careful immunohistopathologic differentiation is necessary. Kaposi sarcoma is an angioproliferative disorder that develops from HHV-8 infection and commonly is associated with HIV. It presents as painless vascular lesions in a range of colors with typical progression from patch to plaque to nodules, frequently on the lower extremities. Histologically, admixtures of bland spindle cells, slitlike small vessel proliferation, and lymphocytic infiltration are typical. Neoplastic vessels lack basement membrane zones, resulting in microhemorrhages and hemosiderin deposition. Neoplastic vessels label with CD31 and CD34 endothelial markers in addition to HHV-8 antibodies, which is highly specific for Kaposi sarcoma and differentiates it from PBL.⁵

Bacillary angiomatosis is an infectious neovascular proliferation characterized by papular lesions that may resemble the lesions of PBL. Mixed cell infiltration in inflammatory cells with clumping of granular material is characteristic. Under Warthin-Starry staining, the granular material is abundant in gram-negative rods representing Bartonella species, which is the implicated infectious agent in bacillary angiomatosis.

Lymphomatoid papulosis (LyP) is the most common CD30+ lymphoproliferative disorder and also may present with exophytic nodules. The etiology of LyP remains unknown, but it is suspected that overexpression of CD30 plays a role. Lymphomatoid papulosis presents as red-violaceous papules and nodules in various stages of healing. Although variable histology among types of LyP exists, CD30+ T-cell lymphocytes remain the hallmark of LyP. Type A LyP, which accounts for 80% of LyP cases, reveals CD4+ and CD30+ cells scattered among neutrophils, eosinophils, and small lymphocytes.5 Lymphomatoid papulosis typically is self-healing, recurrent, and carries an excellent prognosis.

Plasmablastic lymphoma remains a rare and aggressive type of diffuse large B-cell lymphoma that can have primary cutaneous manifestations. It is prudent to consider PBL in the differential diagnosis of nodular lower extremity lesions, especially in immunosuppressed patients.

The Diagnosis: Plasmablastic Lymphoma

A punch biopsy of one of the leg nodules with hematoxylin and eosin staining revealed sheets of medium to large cells with plasmacytic differentiation (Figure, A and B). Immunohistochemistry showed CD79, epithelial membrane antigen, multiple myeloma 1, and CD138 positivity, as well as CD-19 negativity and positive staining on Epstein-Barr virus (EBV) in situ hybridization (Figure, C). Ki-67 stained greater than 90% of the neoplastic cells. Neoplastic cells were found to be λ restricted on κ and λ immunohistochemistry. Human herpesvirus 8 (HHV-8), CD3, and CD20 stains were negative. Subsequent fluorescent in situ hybridization was positive for MYC/immunoglobulin heavy chain (MYC/IGH) rearrangement t(8;14), confirming a diagnosis of plasmablastic lymphoma (PBL).

A bone marrow biopsy revealed normocellular bone marrow with trilineage hematopoiesis and no morphologic, immunophenotypic, or fluorescent in situ hybridization evidence of plasmablastic lymphoma or other pathology in the bone marrow. Our patient was started on hyper-CVAD (cyclophosphamide, vincristine, doxorubicin hydrochloride, dexamethasone) chemotherapy and was doing well with plans for a fourth course of chemotherapy. There is no standardized treatment course for cutaneous PBL, though excision with adjunctive chemotherapy treatment commonly has been reported in the literature.¹

Plasmablastic lymphoma is a rare and aggressive diffuse large B-cell lymphoma associated with EBV infection that compromises approximately 2% to 3% of all HIV-related lymphomas.^1,2 It frequently is associated with immunosuppression in patients with HIV or in transplant recipients on immunosuppression; however, it has been reported in immunocompetent individuals such as elderly patients.² Plasmablastic lymphoma most commonly presents on the buccal mucosa but also can affect the gastrointestinal tract and occasionally has cutaneous manifestations.^1,2 Cutaneous manifestations of PBL range from erythematous infiltrated plaques to ulcerated nodules presenting in an array of colors from flesh colored to violaceous.² Primary cutaneous lesions can be seen on the legs, as in our patient.

Histopathologic examination reveals sheets of plasmablasts or large cells with eccentric nuclei and abundant basophilic cytoplasm.¹ Plasmablastic lymphoma frequently is positive for mature B-cell markers such as CD38, CD138, multiple myeloma 1, and B lymphocyte–induced maturation protein 1.^2,3 Uncommonly, PBL expresses paired box protein Pax-5 and CD20 markers.³ Although pathogenesis is poorly understood, it has been speculated that EBV infection is a common pathogenic factor. Epstein-Barr virus positivity has been noted in 60% of cases.²

Plasmablastic lymphoma and other malignant plasma cell processes such as plasmablastic myeloma (PBM) are morphologically similar. Proliferation of plasmablasts with rare plasmacytic cells is common in PBL, while plasmacytic cells are predominant in PBM. MYC rearrangement/ immunoglobulin heavy chain rearrangement t(8;14) was used to differentiate PBL from PBM in our patient; however, more cases of PBM with MYC/IGH rearrangement t(8;14) have been reported, making it an unreliable differentiating factor.⁴ A detailed clinical, pathologic, and genetic survey remains necessary for confirmatory diagnosis of PBL. Compared to other malignant plasma cell processes, PBL more commonly is seen in immunocompromised patients or those with HIV, such as our patient. Additionally, EBV testing is more likely to be positive in patients with PBL, further supporting this diagnosis in our patient.⁴

Presentations of bacillary angiomatosis, Kaposi sarcoma, and cutaneous lymphoma may be clinically similar; therefore, careful immunohistopathologic differentiation is necessary. Kaposi sarcoma is an angioproliferative disorder that develops from HHV-8 infection and commonly is associated with HIV. It presents as painless vascular lesions in a range of colors with typical progression from patch to plaque to nodules, frequently on the lower extremities. Histologically, admixtures of bland spindle cells, slitlike small vessel proliferation, and lymphocytic infiltration are typical. Neoplastic vessels lack basement membrane zones, resulting in microhemorrhages and hemosiderin deposition. Neoplastic vessels label with CD31 and CD34 endothelial markers in addition to HHV-8 antibodies, which is highly specific for Kaposi sarcoma and differentiates it from PBL.⁵

Bacillary angiomatosis is an infectious neovascular proliferation characterized by papular lesions that may resemble the lesions of PBL. Mixed cell infiltration in inflammatory cells with clumping of granular material is characteristic. Under Warthin-Starry staining, the granular material is abundant in gram-negative rods representing Bartonella species, which is the implicated infectious agent in bacillary angiomatosis.

Lymphomatoid papulosis (LyP) is the most common CD30+ lymphoproliferative disorder and also may present with exophytic nodules. The etiology of LyP remains unknown, but it is suspected that overexpression of CD30 plays a role. Lymphomatoid papulosis presents as red-violaceous papules and nodules in various stages of healing. Although variable histology among types of LyP exists, CD30+ T-cell lymphocytes remain the hallmark of LyP. Type A LyP, which accounts for 80% of LyP cases, reveals CD4+ and CD30+ cells scattered among neutrophils, eosinophils, and small lymphocytes.5 Lymphomatoid papulosis typically is self-healing, recurrent, and carries an excellent prognosis.

Plasmablastic lymphoma remains a rare and aggressive type of diffuse large B-cell lymphoma that can have primary cutaneous manifestations. It is prudent to consider PBL in the differential diagnosis of nodular lower extremity lesions, especially in immunosuppressed patients.

A visual hallucination is a visual percept experienced when awake that is not elicited by an external stimulus. Historically, hallucinations have been synonymous with psychiatric disease, most notably schizophrenia; however, over recent decades, hallucinations have been categorized based on their underlying etiology as psychodynamic (primary psychiatric), psychophysiologic (primary neurologic/structural), and psychobiochemical (neurotransmitter dysfunction).¹ Presently, visual hallucinations are known to be caused by a wide variety of primary psychiatric, neurologic, ophthalmologic, and chemically-mediated conditions. Despite these causes, clinically differentiating the characteristics and qualities of visual hallucinations is often a lesser-known skillset among clinicians. The utility of this skillset is important for the clinician’s ability to differentiate the expected and unexpected characteristics of visual hallucinations in patients with both known and unknown neuropsychiatric conditions.

Though many primary psychiatric and neurologic conditions have been associated with and/or known to cause visual hallucinations, this review focuses on the following grouped causes:

• Primary psychiatric causes: psychiatric disorders with psychotic features and delirium; and
• Primary neurologic causes: neurodegenerative disease/dementias, seizure disorders, migraine disorders, vision loss, peduncular hallucinosis, and hypnagogic/hypnopompic phenomena.

Because the accepted definition of visual hallucinations excludes visual percepts elicited by external stimuli, drug-induced hallucinations would not qualify for either of these categories. Additionally, most studies reporting on the effects of drug-induced hallucinations did not control for underlying comorbid psychiatric conditions, dementia, or delirium, and thus the results cannot be attributed to the drug alone, nor is it possible to identify reliable trends in the properties of the hallucinations.² The goals of this review are to characterize visual hallucinations experienced as a result of primary psychiatric and primary neurologic conditions and describe key grouping and differentiating features to help guide the diagnosis.

Visual hallucinations in the general population

A review of 6 studies (N = 42,519) reported that the prevalence of visual hallucinations in the general population is 7.3%.³ The prevalence decreases to 6% when visual hallucinations arising from physical illness or drug/chemical consumption are excluded. The prevalence of visual hallucinations in the general population has been associated with comorbid anxiety, stress, bereavement, and psychotic pathology.^4,5 Regarding the age of occurrence of visual hallucinations in the general population, there appears to be a bimodal distribution.³ One peak appears in later adolescence and early adulthood, which corresponds with higher rates of psychosis, and another peak occurs late in life, which corresponds to a higher prevalence of neurodegenerative conditions and visual impairment.

Primary psychiatric causes

Most studies of visual hallucinations in primary psychiatric conditions have specifically evaluated patients with schizophrenia and mood disorders with psychotic features.^6,7 In a review of 29 studies (N = 5,873) that specifically examined visual hallucinations in individuals diagnosed with schizophrenia, Waters et al³ found a wide range of reported prevalence (4% to 65%) and a weighted mean prevalence of 27%. In contrast, the prevalence of auditory hallucinations in these participants ranged from 25% to 86%, with a weighted mean of 59%.³

Hallucinations are a known but less common symptom of mood disorders that present with psychotic features.⁸ Waters et al³ also examined the prevalence of visual and auditory hallucinations in mood disorders (including mania, bipolar disorder, and depression) reported in 12 studies (N = 2,892).³ They found the prevalence of visual hallucinations in patients with mood disorders ranged from 6% to 27%, with a weighted mean of 15%, compared to the weighted mean of 28% who experienced auditory hallucinations. Visual hallucinations in primary psychiatric conditions are associated with more severe disease, longer hospitalizations, and poorer prognoses.^9-11

Visual hallucinations of psychosis

In patients with psychotic symptoms, the characteristics of the visually hallucinated entity as well as the cognitive and emotional perception of the hallucinations are notably different than in patients with other, nonpsychiatric causes of visual hallucations.³

Continue to: Content and perceived physical properties

Content and perceived physical properties. Hallucinated entities are most often perceived as solid, 3-dimensional, well-detailed, life-sized people, animals, and objects (often fire) or events existing in the real world.³ The entity is almost always perceived as real, with accurate form and color, fine edges, and shadow; is often out of reach of the perceiver; and can be stationary or moving within the physical properties of the external environment.³

Timing and triggers. The temporal properties vary widely. Hallucinations can last from seconds to minutes and occur at any time of day, though by definition, they must occur while the individual is awake.³ Visual hallucinations in psychosis are more common during times of acute stress, strong emotions, and tiredness.³

Patient reaction and belief. Because of realistic qualities of the visual hallucination and the perception that it is real, patients commonly attempt to participate in some activity in relation to the hallucination, such as moving away from or attempting to interact with it.³ Additionally, patients usually perceive the hallucinated entity as uncontrollable, and are surprised when the entity appears or disappears. Though the content of the hallucination is usually impersonal, the meaning the patient attributes to the presence of the hallucinated entity is usually perceived as very personal and often requiring action. The hallucination may represent a harbinger, sign, or omen, and is often interpreted religiously or spiritually and accompanied by comorbid delusions.³

Visual hallucinations of delirium

Delirium is a syndrome of altered mentation—most notably consciousness, attention, and orientation—that occurs as a result of ≥1 metabolic, infectious, drug-induced, or other medical conditions and often manifests as an acute secondary psychotic illness.¹² Multiple patient and environmental characteristics have been identified as risk factors for developing delirium, including multiple and/or severe medical illnesses, preexisting dementia, depression, advanced age, polypharmacy, having an indwelling urinary catheter, impaired sight or hearing, and low albumin levels.^13-15 The development of delirium is significantly and positively associated with regular alcohol use, benzodiazepine withdrawal, and angiotensin receptor blocker and dopamine receptor agonist usage.¹⁵ Approximately 40% of patients with delirium have symptoms of psychosis, and in contrast to the hallucinations experienced by patients with schizophrenia, visual hallucinations are the most common type of hallucinations seen in delirium (27%).¹³ In a 2021 review that included 602 patients with delirium, Tachibana et al¹⁵ found that approximately 26% experienced hallucinations, 92% of which were visual hallucinations.

Content, perceived physical properties, and reaction. Because of the limited attention and cognitive function of patients with delirium, less is known about the content of their visual hallucinations. However, much like those with primary psychotic symptoms, patients with delirium often report seeing complex, normal-sized, concrete entities, most commonly people. Tachibana et al¹⁵ found that the hallucinated person is more often a stranger than a familiar person, but (rarely) may be an ethereal being such as a devil or ghost. The next most common visually hallucinated entities were creatures, most frequently insects and animals. Other common hallucinations were visions of events or objects, such as fires, falling ceilings, or water. Similar to those with primary psychotic illness such as schizophrenia, patients with delirium often experience emotional distress, anxiety, fear, and confusion in response to the hallucinated person, object, and/or event.¹⁵

Continue to: Primary neurologic causes

Visual hallucinations in neurodegenerative diseases

Patients with neurodegenerative diseases such as Parkinson disease (PD), dementia with Lewy bodies (DLB), or Creutzfeldt-Jakob disease (CJD) commonly experience hallucinations as a feature of their condition. However, the true cause of these hallucinations often cannot be directly attributed to any specific pathophysiology because these patients often have multiple coexisting risk factors, such as advanced age, major depressive disorder, use of neuroactive medications, and co-occurring somatic illness. Though the prevalence of visual hallucinations varies widely between studies, with 15% to 40% reported in patients with PD, the prevalence roughly doubles in patients with PD-associated dementia (30% to 60%), and is reported by 60% to 90% of those with DLB.^16-18 Hallucinations are generally thought to be less common in Alzheimer disease; such patients most commonly experience visual hallucinations, although the reported prevalence ranges widely (4% to 59%).^19,20 Notably, similarly to hallucinations experienced in patients with delirium, and in contrast to those with psychosis, visual hallucinations are more common than auditory hallucinations in neurodegenerative diseases.²⁰ Hallucinations are not common in individuals with CJD but are a key defining feature of the Heidenhain variant of CJD, which makes up approximately 5% of cases.²¹

Content, perceived physical properties, and reaction. Similar to the visual hallucinations experienced by patients with psychosis or delirium, those experienced in patients with PD, DLB, or CJD are often complex, most commonly of people, followed by animals and objects. The presence of “passage hallucinations”—in which a person or animal is seen in a patient’s peripheral vision, but passes out of their visual field before the entity can be directly visualized—is common.²⁰ Those with PD also commonly have visual hallucinations in which the form of an object appears distorted (dysmorphopsia) or the color of an object appears distorted (metachromatopsia), though these would better be classified as illusions because a real object is being perceived with distortion.²²

Hallucinations are more common in the evening and at night. “Presence hallucinations” are a common type of hallucination that cannot be directly related to a specific sensory modality such as vision, though they are commonly described by patients with PD as a seen or perceived image (usually a person) that is not directly in the individual’s visual field.¹⁷ These presence hallucinations are often described as being behind the patient or in a visualized scene of what was about to happen. Before developing the dementia and myoclonus also seen in sporadic CJD, patients with the Heidenhain variant of CJD describe illusions such as metachromatopsia, dysmorphia, and micropsia that eventually develop into frank visual hallucinations, which have been poorly reported in medical literature.^22,23 There are no generalizable trends in the temporal nature of visual hallucinations in patients with neuro­degenerative diseases. In most cases of visual hallucinations in patients with PD and dementia, insight relating to the perception varies widely based on the patient’s cognitive status. Subsequently, patients’ reactions to the hallucinations also vary widely.

Visual hallucinations in epileptic seizures

Occipital lobe epilepsies represent 1% to 4.6% of all epilepsies; however, these represent 20% to 30% of benign childhood partial epilepsies.^24,25 These are commonly associated with various types of visual hallucinations depending upon the location of the seizure onset within the occipital lobe. These are referred to as visual auras.²⁶ Visual auras are classified into simple visual hallucinations, complex visual hallucinations, visual illusions, and ictal amaurosis (hemifield blindness or complete blindness).

Content, perceived physical properties, and reaction. Simple visual hallucinations are often described as brief, stereotypical flashing lights of various shapes and colors. These images may flicker, change shape, or take on a geometric or irregular pattern. Appearances can be repetitive and stereotyped, are often reported as moving horizontally from the periphery to the center of the visual field, and can spread to the entire visual field. Most often, these hallucinations occur for 5 to 30 seconds, and have no discernible provoking factors. Complex visual hallucinations consist of formed images of animals, people, or elaborate scenes. These are believed to reflect activation of a larger area of cortex in the temporo-parieto-occipital region, which is the visual association cortex. Very rarely, occipital lobe seizures can manifest with ictal amaurosis.²⁴

Continue to: Simple visual auras...

Simple visual auras have a very high localizing value to the occipital lobe. The primary visual cortex (Brodmann area 17) is situated in the banks of calcarine fissure and activation of this region produces these simple hallucinations. If the hallucinations are consistently lateralized, the seizures are very likely to be coming from the contralateral occipital lobe.

Visual hallucinations in brain tumors

In general, a tumor anywhere along the optic path can produce visual hallucinations; however, the exact causal mechanism of the hallucinations is unknown. Moreover, tumors in different locations—namely the occipital lobes, temporal lobes, and frontal lobes—appear to produce visual hallucinations with substantially different characteristics.^27-29 Further complicating the search for the mechanism of these hallucinations is the fact that tumors are epileptogenic. In addition, 36% to 48% of patients with brain tumors have mood symptoms (depression/mania), and 22% to 24% have psychotic symptoms (delusions/hallucinations); these symptoms are considerably location-dependent.^30-32

Content and associated signs/symptoms. There are some grouped symptoms and/or hallucination characteristics associated with cerebral tumors in different lobes of the brain, though these symptoms are not specific. The visual hallucinations associated with brain tumors are typically confined to the field of vision that corresponds to the location of the tumor. Additionally, many such patients have a baseline visual field defect to some extent due to the tumor location.

In patients with occipital lobe tumors, visual hallucinations closely resemble those experienced in occipital lobe seizures, specifically bright flashes of light in colorful simple and complex shapes. Interestingly, those with occipital lobe tumors report xanthopsia, a form of chromatopsia in which objects in their field of view appear abnormally colored a yellowish shade.^26,27

In patients with temporal lobe tumors, more complex visual hallucinations of people, objects, and events occurring around them are often accompanied by auditory hallucinations, olfactory hallucinations, and/or anosmia.²⁸In those with frontal lobe tumors, similar complex visual hallucinations of people, objects, and events are seen, and olfactory hallucinations and/or anosmia are often experienced. However, these patients often have a lower likelihood of experiencing auditory hallucinations, and a higher likelihood of developing personality changes and depression than other psychotic symptoms. The visual hallucinations experienced in those with frontal lobe tumors are more likely to have violent content.²⁹

Continue to: Visual hallucinations in migraine with aura

Visual hallucinations in migraine with aura

The estimated prevalence of migraine in the general population is 15% to 29%; 31% of those with migraine experience auras.^33-35 Approximately 99% of those with migraine auras experience some type of associated visual phenomena.^33,36 The pathophysiology of migraine is believed to be related to spreading cortical depression, in which a slowly propagating wave of neuroelectric depolarization travels over the cortex, followed by a depression of normal brain activity. Visual aura is thought to occur due to the resulting changes in cortical activity in the visual cortex; however, the exact electro­physiology of visual migraine aura is not entirely known.^37,38 Though most patients with visual migraine aura experience simple visual hallucinations, complex hallucinations have been reported in the (very rare) cases of migraine coma and familial hemiplegic migraine.³⁹

Content and associated signs/symptoms. The most common hallucinated entities reported by patients with migraine with aura are zigzag, flashing/sparkling, black and white curved figure(s) in the center of the visual field, commonly called a scintillating phosphene or scintillating scotoma.³⁶ The perceived entity is often singular and gradually moves from the center to the periphery of the visual field. These visual hallucinations appear in front of all other objects in the visual field and do not interact with the environment or observer, or resemble or morph into any real-world objects, though they may change in contour, size, and color. The scintillating nature of the hallucination often resolves within minutes, usually leaving a scotoma, or area of vision loss, in the area, with resolution back to baseline vision within 1 hour. The straight, zigzag, and usually black-and-white nature of the scintillating phosphenes of migraine are in notable contrast to the colorful, often circular visual hallucinations experienced in patients with occipital lobe seizures.²⁵

Visual hallucinations in peduncular hallucinosis

Peduncular hallucinosis is a syndrome of predominantly dreamlike visual hallucinations that occurs in the setting of lesions in the midbrain and/or thalamus.⁴⁰ A recent review of the lesion etiology found that approximately 63% are caused by focal infarction and approximately 15% are caused by mass lesions; subarachnoid hemorrhage, intracerebral hemorrhage, and demyelination cause approximately 5% of cases each.⁴⁰ Additionally, a review of the affected brainstem anatomy showed almost all lesions were found in the paramedian reticular formations of the midbrain and pons, with the vast majority of lesions affecting or adjacent to the oculomotor and raphe nuclei of the midbrain.³⁹ Due to the commonly involved visual pathway, some researchers have suggested these hallucinations may be the result of a release phenomenon.³⁹

Content and associated signs/symptoms. The visual hallucinations of peduncular hallucinosis usually start 1 to 5 days after the causal lesion forms, last several minutes to hours, and most stop after 1 to 3 weeks; however, cases of hallucinations lasting for years have been reported. These hallucinations have a diurnal pattern of usually appearing while the patient is resting in the evening and/or preparing for sleep. The characteristics of visual hallucinations vary widely from simple distortions in how real objects appear to colorful and vivid hallucinated events and people who can interact with the observer. The content of the visual hallucinations often changes in nature during the hallucination, or from one hallucination to the next. The hallucinated entities can be worldly or extraterrestrial. Once these patients fall asleep, they often have equally vivid and unusual dreams, with content similar to their visual hallucinations. Due to the anatomical involvement of the nigrostriatal pathway and oculomotor nuclei, co-occurring parkinsonism, ataxia, and oculomotor nerve palsy are common and can be a key clinical feature in establishing the diagnosis. Though patients with peduncular hallucinations commonly fear their hallucinations, they often eventually gain insight, which eases their anxiety.³⁹

Other causes

Visual hallucinations in visual impairment

Visual hallucinations are a diagnostic requirement for Charles Bonnet syndrome, in which individuals with vision loss experience visual hallucinations in the corresponding field of vision loss.⁴¹ A lesion at any point in the visual pathway that produces visual loss can lead to Charles Bonnet syndrome; however, age-related macular degeneration is the most common cause.⁴² The hallucinations of Charles Bonnet syndrome are believed to be a release phenomenon, given the defective visual pathway and resultant dysfunction in visual processing. The prevalence of Charles Bonnet syndrome ranges widely by study. Larger studies report a prevalence of 11% to 27% in patients with age-related macular degeneration, depending on the severity of vision loss.^43,44 Because there are many causes of Charles Bonnet syndrome, and because a recent study found that only 15% of patients with this syndrome told their eye care clinician and that 21% had not reported their hallucinatory symptoms to anyone, the true prevalence is unknown.⁴² Though the onset of visual hallucinations correlates with the onset of vision loss, there appears to be no association between the nature or complexity of the hallucinations and the severity or progression of the patient’s vision loss.⁴⁵ Some studies have reported either the onset of or a higher frequency of visual hallucinations at a time of visual recovery (for example, treatment or exudative age-related macular degeneration), which suggests that hallucinations may be triggered by fluctuations in visual acuity.^46,47 Additional risk factors for experiencing visual hallucinations in the setting of visual pathway deficit include a history of stroke, social isolation, poor cognitive function, poor lighting, and age ≥65.

Continue to: Content and associated signs/symptoms

Content and associated signs/symptoms. The visual hallucinations of patients with Charles Bonnet syndrome appear almost exclusively in the defective visual field. Images tend to be complex, colored, with moving parts, and appear in front of the patient. The hallucinations are usually of familiar or normal-appearing people or mundane objects, and as such, the patient often does not realize the hallucinated entity is not real. In patients without comorbid psychiatric disease, visual hallucinations are not accompanied by any other types of hallucinations. The most commonly hallucinated entities are people, followed by simple visual hallucinations of geometric patterns, and then by faces (natural or cartoon-like) and inanimate objects. Hallucinations most commonly occur daily or weekly, and upon waking. These hallucinations most often last several minutes, though they can last just a few seconds or for hours. Hallucinations are usually emotionally neutral, but most patients report feeling confused by their appearance and having a fear of underlying psychiatric disease. They often gain insight to the unreal nature of the hallucinations after counseling.⁴⁸

Visual hallucinations at the sleep/wake interface

Hypnagogic and hypnopompic hallucinations are fleeting perceptual experiences that occur while an individual is falling asleep or waking, respectively.⁴⁹ Because by definition visual hallucinations occur while the individual is fully awake, categorizing hallucination-like experiences such as hypnagogia and hypnopompia is difficult, especially since these are similar to other states in which alterations in perception are expected (namely a dream state). They are commonly associated with sleep disorders such as narcolepsy, cataplexy, and sleep paralysis.^50,51 In a study of 13,057 individuals in the general population, Ohayon et al⁴ found the overall prevalence of hypnagogic or hypnopompic hallucinations was 24.8% (5.3% visual) and 6.6% (1.5% visual), respectively. Approximately one-third of participants reported having experienced ≥1 hallucinatory experience in their lifetime, regardless of being asleep or awake.⁴ There was a higher prevalence of hypnagogic/hypnopompic experiences among those who also reported daytime hallucinations or other psychotic features.

Content and associated signs/symptoms. Unfortunately, because of the frequent co-occurrence of sleep disorders and psychiatric conditions, as well as the general paucity of research, it is difficult to characterize the visual phenomenology of hypnagogic/hypnopompic hallucinations. Some evidence suggests the nature of the perception of the objects hallucinated is substantially impacted by the presence of preexisting psychotic symptoms. Insight into the reality of these hallucinations also depends upon the presence of comorbid psychiatric disease. Hypnagogic/hypnopompic hallucinations are often described as complex, colorful, vivid, and dream-like, as if the patient was in a “half sleep” state.⁵² They are usually described as highly detailed events involving people and/or animals, though they may be grotesque in nature. Perceived entities are often described as undergoing a transformation or being mobile in their environment. Rarely do these perceptions invoke emotion or change the patient’s beliefs. Hypnagogia/hypnopompia also often have an auditory or haptic component to them. Visual phenomena can either appear to take place within an alternative background environment or appear superimposed on the patient’s actual physical environment.

How to determine the cause

In many of the studies cited in this review, the participants had a considerable amount of psychiatric comorbidity, which makes it difficult to discriminate between pure neurologic and pure psychiatric causes of hallucinations. Though the visual content of the hallucinations (people, objects, shapes, lights) can help clinicians broadly differentiate causes, many other characteristics of both the hallucinations and the patient can help determine the cause (Table^{3,4,12-39,41-52}). The most useful characteristics for discerning the etiology of an individual’s visual hallucinations are the patient’s age, the visual field in which the hallucination occurs, and the complexity/simplicity of the hallucination.

Patient age. Hallucinations associated with primary psychosis decrease with age. The average age of onset of migraine with aura is 21. Occipital lobe seizures occur in early childhood to age 40, but most commonly occur in the second decade.^32,36 No trend in age can be reliably determined in individuals who experience hypnagogia/hypnopompia. In contrast, other potential causes of visual hallucinations, such as delirium, neurodegenerative disease, eye disease, and peduncular hallucinosis, are more commonly associated with advanced age.

Continue to: The visual field(s)

The visual field(s) in which the hallucination occurs can help differentiate possible causes in patients with seizure, brain tumor, migraine, or visual impairment. In patients with psychosis, delirium, peduncular hallucinosis, or hypnagogia/hypnopompia, hallucinations can occur in any visual field. Those with neurodegenerative disease, particularly PD, commonly describe seeing so-called passage hallucinations and presence hallucinations, which occur outside of the patient’s direct vision. Visual hallucinations associated with seizure are often unilateral (homonymous left or right hemifield), and contralateral to the affected neurologic structures in the visual neural pathway; they start in the left or right peripheral vision and gradually move to the central visual field. In hallucinations experienced by patients with brain tumors, the hallucinated entities typically appear on the visual field contralateral to the underlying tumor. Visual hallucinations seen in migraine often include a figure that moves from central vision to more lateral in the visual field. The visual hallucinations seen in eye disease (namely Charles Bonnet syndrome) are almost exclusively perceived in the visual fields affected by decreased visual acuity, though non-side-locked visual hallucinations are common in patients with age-related macular degeneration.

Content and complexity. The visual hallucinations perceived in those with psychosis, delirium, neurodegenerative disease, and sleep disorders are generally complex. These hallucinations tend to be of people, animals, scenes, or faces and include color and associated sound, with moving parts and interactivity with either the patient or the environment. These are in contrast to the simple visual hallucinations of visual cortex seizures, brain tumors, and migraine aura, which are often reported as brightly colored or black/white lights, flashes, and shapes, with or without associated auditory, olfactory, or somatic sensation. Furthermore, hallucinations due to seizure and brain tumor (also likely due to seizure) are often of brightly colored shapes and lights with curved edges, while patients with migraine more commonly report singular sparkling black/white objects with straight lines.

Bottom Line

Though there are no features known to be specific to only 1 cause of visual hallucinations, some characteristics of both the patient and the hallucinations can help direct the diagnostic differential. The most useful characteristics are the patient’s age, the visual field in which the hallucination occurs, and the complexity/ simplicity of the hallucination.

Related Resources

• Wang J, Patel D, Francois D. Elaborate hallucinations, but is it a psychotic disorder? Current Psychiatry. 2021;20(2):46-50. doi:10.12788/cp.0091
• O’Brien J, Taylor JP, Ballard C, et al. Visual hallucinations in neurological and ophthalmological disease: pathophysiology and management. J Neurol Neurosurg Psychiatry. 2020; 91(5):512-519. doi:10.1136/jnnp-2019-322702

A visual hallucination is a visual percept experienced when awake that is not elicited by an external stimulus. Historically, hallucinations have been synonymous with psychiatric disease, most notably schizophrenia; however, over recent decades, hallucinations have been categorized based on their underlying etiology as psychodynamic (primary psychiatric), psychophysiologic (primary neurologic/structural), and psychobiochemical (neurotransmitter dysfunction).¹ Presently, visual hallucinations are known to be caused by a wide variety of primary psychiatric, neurologic, ophthalmologic, and chemically-mediated conditions. Despite these causes, clinically differentiating the characteristics and qualities of visual hallucinations is often a lesser-known skillset among clinicians. The utility of this skillset is important for the clinician’s ability to differentiate the expected and unexpected characteristics of visual hallucinations in patients with both known and unknown neuropsychiatric conditions.

Though many primary psychiatric and neurologic conditions have been associated with and/or known to cause visual hallucinations, this review focuses on the following grouped causes:

• Primary psychiatric causes: psychiatric disorders with psychotic features and delirium; and
• Primary neurologic causes: neurodegenerative disease/dementias, seizure disorders, migraine disorders, vision loss, peduncular hallucinosis, and hypnagogic/hypnopompic phenomena.

Because the accepted definition of visual hallucinations excludes visual percepts elicited by external stimuli, drug-induced hallucinations would not qualify for either of these categories. Additionally, most studies reporting on the effects of drug-induced hallucinations did not control for underlying comorbid psychiatric conditions, dementia, or delirium, and thus the results cannot be attributed to the drug alone, nor is it possible to identify reliable trends in the properties of the hallucinations.² The goals of this review are to characterize visual hallucinations experienced as a result of primary psychiatric and primary neurologic conditions and describe key grouping and differentiating features to help guide the diagnosis.

Visual hallucinations in the general population

A review of 6 studies (N = 42,519) reported that the prevalence of visual hallucinations in the general population is 7.3%.³ The prevalence decreases to 6% when visual hallucinations arising from physical illness or drug/chemical consumption are excluded. The prevalence of visual hallucinations in the general population has been associated with comorbid anxiety, stress, bereavement, and psychotic pathology.^4,5 Regarding the age of occurrence of visual hallucinations in the general population, there appears to be a bimodal distribution.³ One peak appears in later adolescence and early adulthood, which corresponds with higher rates of psychosis, and another peak occurs late in life, which corresponds to a higher prevalence of neurodegenerative conditions and visual impairment.

Primary psychiatric causes

Most studies of visual hallucinations in primary psychiatric conditions have specifically evaluated patients with schizophrenia and mood disorders with psychotic features.^6,7 In a review of 29 studies (N = 5,873) that specifically examined visual hallucinations in individuals diagnosed with schizophrenia, Waters et al³ found a wide range of reported prevalence (4% to 65%) and a weighted mean prevalence of 27%. In contrast, the prevalence of auditory hallucinations in these participants ranged from 25% to 86%, with a weighted mean of 59%.³

Hallucinations are a known but less common symptom of mood disorders that present with psychotic features.⁸ Waters et al³ also examined the prevalence of visual and auditory hallucinations in mood disorders (including mania, bipolar disorder, and depression) reported in 12 studies (N = 2,892).³ They found the prevalence of visual hallucinations in patients with mood disorders ranged from 6% to 27%, with a weighted mean of 15%, compared to the weighted mean of 28% who experienced auditory hallucinations. Visual hallucinations in primary psychiatric conditions are associated with more severe disease, longer hospitalizations, and poorer prognoses.^9-11

Visual hallucinations of psychosis

In patients with psychotic symptoms, the characteristics of the visually hallucinated entity as well as the cognitive and emotional perception of the hallucinations are notably different than in patients with other, nonpsychiatric causes of visual hallucations.³

Continue to: Content and perceived physical properties

Content and perceived physical properties. Hallucinated entities are most often perceived as solid, 3-dimensional, well-detailed, life-sized people, animals, and objects (often fire) or events existing in the real world.³ The entity is almost always perceived as real, with accurate form and color, fine edges, and shadow; is often out of reach of the perceiver; and can be stationary or moving within the physical properties of the external environment.³

Timing and triggers. The temporal properties vary widely. Hallucinations can last from seconds to minutes and occur at any time of day, though by definition, they must occur while the individual is awake.³ Visual hallucinations in psychosis are more common during times of acute stress, strong emotions, and tiredness.³

Patient reaction and belief. Because of realistic qualities of the visual hallucination and the perception that it is real, patients commonly attempt to participate in some activity in relation to the hallucination, such as moving away from or attempting to interact with it.³ Additionally, patients usually perceive the hallucinated entity as uncontrollable, and are surprised when the entity appears or disappears. Though the content of the hallucination is usually impersonal, the meaning the patient attributes to the presence of the hallucinated entity is usually perceived as very personal and often requiring action. The hallucination may represent a harbinger, sign, or omen, and is often interpreted religiously or spiritually and accompanied by comorbid delusions.³

Visual hallucinations of delirium

Delirium is a syndrome of altered mentation—most notably consciousness, attention, and orientation—that occurs as a result of ≥1 metabolic, infectious, drug-induced, or other medical conditions and often manifests as an acute secondary psychotic illness.¹² Multiple patient and environmental characteristics have been identified as risk factors for developing delirium, including multiple and/or severe medical illnesses, preexisting dementia, depression, advanced age, polypharmacy, having an indwelling urinary catheter, impaired sight or hearing, and low albumin levels.^13-15 The development of delirium is significantly and positively associated with regular alcohol use, benzodiazepine withdrawal, and angiotensin receptor blocker and dopamine receptor agonist usage.¹⁵ Approximately 40% of patients with delirium have symptoms of psychosis, and in contrast to the hallucinations experienced by patients with schizophrenia, visual hallucinations are the most common type of hallucinations seen in delirium (27%).¹³ In a 2021 review that included 602 patients with delirium, Tachibana et al¹⁵ found that approximately 26% experienced hallucinations, 92% of which were visual hallucinations.

Content, perceived physical properties, and reaction. Because of the limited attention and cognitive function of patients with delirium, less is known about the content of their visual hallucinations. However, much like those with primary psychotic symptoms, patients with delirium often report seeing complex, normal-sized, concrete entities, most commonly people. Tachibana et al¹⁵ found that the hallucinated person is more often a stranger than a familiar person, but (rarely) may be an ethereal being such as a devil or ghost. The next most common visually hallucinated entities were creatures, most frequently insects and animals. Other common hallucinations were visions of events or objects, such as fires, falling ceilings, or water. Similar to those with primary psychotic illness such as schizophrenia, patients with delirium often experience emotional distress, anxiety, fear, and confusion in response to the hallucinated person, object, and/or event.¹⁵

Continue to: Primary neurologic causes

Visual hallucinations in neurodegenerative diseases

Patients with neurodegenerative diseases such as Parkinson disease (PD), dementia with Lewy bodies (DLB), or Creutzfeldt-Jakob disease (CJD) commonly experience hallucinations as a feature of their condition. However, the true cause of these hallucinations often cannot be directly attributed to any specific pathophysiology because these patients often have multiple coexisting risk factors, such as advanced age, major depressive disorder, use of neuroactive medications, and co-occurring somatic illness. Though the prevalence of visual hallucinations varies widely between studies, with 15% to 40% reported in patients with PD, the prevalence roughly doubles in patients with PD-associated dementia (30% to 60%), and is reported by 60% to 90% of those with DLB.^16-18 Hallucinations are generally thought to be less common in Alzheimer disease; such patients most commonly experience visual hallucinations, although the reported prevalence ranges widely (4% to 59%).^19,20 Notably, similarly to hallucinations experienced in patients with delirium, and in contrast to those with psychosis, visual hallucinations are more common than auditory hallucinations in neurodegenerative diseases.²⁰ Hallucinations are not common in individuals with CJD but are a key defining feature of the Heidenhain variant of CJD, which makes up approximately 5% of cases.²¹

Content, perceived physical properties, and reaction. Similar to the visual hallucinations experienced by patients with psychosis or delirium, those experienced in patients with PD, DLB, or CJD are often complex, most commonly of people, followed by animals and objects. The presence of “passage hallucinations”—in which a person or animal is seen in a patient’s peripheral vision, but passes out of their visual field before the entity can be directly visualized—is common.²⁰ Those with PD also commonly have visual hallucinations in which the form of an object appears distorted (dysmorphopsia) or the color of an object appears distorted (metachromatopsia), though these would better be classified as illusions because a real object is being perceived with distortion.²²

Hallucinations are more common in the evening and at night. “Presence hallucinations” are a common type of hallucination that cannot be directly related to a specific sensory modality such as vision, though they are commonly described by patients with PD as a seen or perceived image (usually a person) that is not directly in the individual’s visual field.¹⁷ These presence hallucinations are often described as being behind the patient or in a visualized scene of what was about to happen. Before developing the dementia and myoclonus also seen in sporadic CJD, patients with the Heidenhain variant of CJD describe illusions such as metachromatopsia, dysmorphia, and micropsia that eventually develop into frank visual hallucinations, which have been poorly reported in medical literature.^22,23 There are no generalizable trends in the temporal nature of visual hallucinations in patients with neuro­degenerative diseases. In most cases of visual hallucinations in patients with PD and dementia, insight relating to the perception varies widely based on the patient’s cognitive status. Subsequently, patients’ reactions to the hallucinations also vary widely.

Visual hallucinations in epileptic seizures

Occipital lobe epilepsies represent 1% to 4.6% of all epilepsies; however, these represent 20% to 30% of benign childhood partial epilepsies.^24,25 These are commonly associated with various types of visual hallucinations depending upon the location of the seizure onset within the occipital lobe. These are referred to as visual auras.²⁶ Visual auras are classified into simple visual hallucinations, complex visual hallucinations, visual illusions, and ictal amaurosis (hemifield blindness or complete blindness).

Content, perceived physical properties, and reaction. Simple visual hallucinations are often described as brief, stereotypical flashing lights of various shapes and colors. These images may flicker, change shape, or take on a geometric or irregular pattern. Appearances can be repetitive and stereotyped, are often reported as moving horizontally from the periphery to the center of the visual field, and can spread to the entire visual field. Most often, these hallucinations occur for 5 to 30 seconds, and have no discernible provoking factors. Complex visual hallucinations consist of formed images of animals, people, or elaborate scenes. These are believed to reflect activation of a larger area of cortex in the temporo-parieto-occipital region, which is the visual association cortex. Very rarely, occipital lobe seizures can manifest with ictal amaurosis.²⁴

Continue to: Simple visual auras...

Simple visual auras have a very high localizing value to the occipital lobe. The primary visual cortex (Brodmann area 17) is situated in the banks of calcarine fissure and activation of this region produces these simple hallucinations. If the hallucinations are consistently lateralized, the seizures are very likely to be coming from the contralateral occipital lobe.

Visual hallucinations in brain tumors

In general, a tumor anywhere along the optic path can produce visual hallucinations; however, the exact causal mechanism of the hallucinations is unknown. Moreover, tumors in different locations—namely the occipital lobes, temporal lobes, and frontal lobes—appear to produce visual hallucinations with substantially different characteristics.^27-29 Further complicating the search for the mechanism of these hallucinations is the fact that tumors are epileptogenic. In addition, 36% to 48% of patients with brain tumors have mood symptoms (depression/mania), and 22% to 24% have psychotic symptoms (delusions/hallucinations); these symptoms are considerably location-dependent.^30-32

Content and associated signs/symptoms. There are some grouped symptoms and/or hallucination characteristics associated with cerebral tumors in different lobes of the brain, though these symptoms are not specific. The visual hallucinations associated with brain tumors are typically confined to the field of vision that corresponds to the location of the tumor. Additionally, many such patients have a baseline visual field defect to some extent due to the tumor location.

In patients with occipital lobe tumors, visual hallucinations closely resemble those experienced in occipital lobe seizures, specifically bright flashes of light in colorful simple and complex shapes. Interestingly, those with occipital lobe tumors report xanthopsia, a form of chromatopsia in which objects in their field of view appear abnormally colored a yellowish shade.^26,27

In patients with temporal lobe tumors, more complex visual hallucinations of people, objects, and events occurring around them are often accompanied by auditory hallucinations, olfactory hallucinations, and/or anosmia.²⁸In those with frontal lobe tumors, similar complex visual hallucinations of people, objects, and events are seen, and olfactory hallucinations and/or anosmia are often experienced. However, these patients often have a lower likelihood of experiencing auditory hallucinations, and a higher likelihood of developing personality changes and depression than other psychotic symptoms. The visual hallucinations experienced in those with frontal lobe tumors are more likely to have violent content.²⁹

Continue to: Visual hallucinations in migraine with aura

Visual hallucinations in migraine with aura

The estimated prevalence of migraine in the general population is 15% to 29%; 31% of those with migraine experience auras.^33-35 Approximately 99% of those with migraine auras experience some type of associated visual phenomena.^33,36 The pathophysiology of migraine is believed to be related to spreading cortical depression, in which a slowly propagating wave of neuroelectric depolarization travels over the cortex, followed by a depression of normal brain activity. Visual aura is thought to occur due to the resulting changes in cortical activity in the visual cortex; however, the exact electro­physiology of visual migraine aura is not entirely known.^37,38 Though most patients with visual migraine aura experience simple visual hallucinations, complex hallucinations have been reported in the (very rare) cases of migraine coma and familial hemiplegic migraine.³⁹

Content and associated signs/symptoms. The most common hallucinated entities reported by patients with migraine with aura are zigzag, flashing/sparkling, black and white curved figure(s) in the center of the visual field, commonly called a scintillating phosphene or scintillating scotoma.³⁶ The perceived entity is often singular and gradually moves from the center to the periphery of the visual field. These visual hallucinations appear in front of all other objects in the visual field and do not interact with the environment or observer, or resemble or morph into any real-world objects, though they may change in contour, size, and color. The scintillating nature of the hallucination often resolves within minutes, usually leaving a scotoma, or area of vision loss, in the area, with resolution back to baseline vision within 1 hour. The straight, zigzag, and usually black-and-white nature of the scintillating phosphenes of migraine are in notable contrast to the colorful, often circular visual hallucinations experienced in patients with occipital lobe seizures.²⁵

Visual hallucinations in peduncular hallucinosis

Peduncular hallucinosis is a syndrome of predominantly dreamlike visual hallucinations that occurs in the setting of lesions in the midbrain and/or thalamus.⁴⁰ A recent review of the lesion etiology found that approximately 63% are caused by focal infarction and approximately 15% are caused by mass lesions; subarachnoid hemorrhage, intracerebral hemorrhage, and demyelination cause approximately 5% of cases each.⁴⁰ Additionally, a review of the affected brainstem anatomy showed almost all lesions were found in the paramedian reticular formations of the midbrain and pons, with the vast majority of lesions affecting or adjacent to the oculomotor and raphe nuclei of the midbrain.³⁹ Due to the commonly involved visual pathway, some researchers have suggested these hallucinations may be the result of a release phenomenon.³⁹

Content and associated signs/symptoms. The visual hallucinations of peduncular hallucinosis usually start 1 to 5 days after the causal lesion forms, last several minutes to hours, and most stop after 1 to 3 weeks; however, cases of hallucinations lasting for years have been reported. These hallucinations have a diurnal pattern of usually appearing while the patient is resting in the evening and/or preparing for sleep. The characteristics of visual hallucinations vary widely from simple distortions in how real objects appear to colorful and vivid hallucinated events and people who can interact with the observer. The content of the visual hallucinations often changes in nature during the hallucination, or from one hallucination to the next. The hallucinated entities can be worldly or extraterrestrial. Once these patients fall asleep, they often have equally vivid and unusual dreams, with content similar to their visual hallucinations. Due to the anatomical involvement of the nigrostriatal pathway and oculomotor nuclei, co-occurring parkinsonism, ataxia, and oculomotor nerve palsy are common and can be a key clinical feature in establishing the diagnosis. Though patients with peduncular hallucinations commonly fear their hallucinations, they often eventually gain insight, which eases their anxiety.³⁹

Other causes

Visual hallucinations in visual impairment

Visual hallucinations are a diagnostic requirement for Charles Bonnet syndrome, in which individuals with vision loss experience visual hallucinations in the corresponding field of vision loss.⁴¹ A lesion at any point in the visual pathway that produces visual loss can lead to Charles Bonnet syndrome; however, age-related macular degeneration is the most common cause.⁴² The hallucinations of Charles Bonnet syndrome are believed to be a release phenomenon, given the defective visual pathway and resultant dysfunction in visual processing. The prevalence of Charles Bonnet syndrome ranges widely by study. Larger studies report a prevalence of 11% to 27% in patients with age-related macular degeneration, depending on the severity of vision loss.^43,44 Because there are many causes of Charles Bonnet syndrome, and because a recent study found that only 15% of patients with this syndrome told their eye care clinician and that 21% had not reported their hallucinatory symptoms to anyone, the true prevalence is unknown.⁴² Though the onset of visual hallucinations correlates with the onset of vision loss, there appears to be no association between the nature or complexity of the hallucinations and the severity or progression of the patient’s vision loss.⁴⁵ Some studies have reported either the onset of or a higher frequency of visual hallucinations at a time of visual recovery (for example, treatment or exudative age-related macular degeneration), which suggests that hallucinations may be triggered by fluctuations in visual acuity.^46,47 Additional risk factors for experiencing visual hallucinations in the setting of visual pathway deficit include a history of stroke, social isolation, poor cognitive function, poor lighting, and age ≥65.

Continue to: Content and associated signs/symptoms

Content and associated signs/symptoms. The visual hallucinations of patients with Charles Bonnet syndrome appear almost exclusively in the defective visual field. Images tend to be complex, colored, with moving parts, and appear in front of the patient. The hallucinations are usually of familiar or normal-appearing people or mundane objects, and as such, the patient often does not realize the hallucinated entity is not real. In patients without comorbid psychiatric disease, visual hallucinations are not accompanied by any other types of hallucinations. The most commonly hallucinated entities are people, followed by simple visual hallucinations of geometric patterns, and then by faces (natural or cartoon-like) and inanimate objects. Hallucinations most commonly occur daily or weekly, and upon waking. These hallucinations most often last several minutes, though they can last just a few seconds or for hours. Hallucinations are usually emotionally neutral, but most patients report feeling confused by their appearance and having a fear of underlying psychiatric disease. They often gain insight to the unreal nature of the hallucinations after counseling.⁴⁸

Visual hallucinations at the sleep/wake interface

Hypnagogic and hypnopompic hallucinations are fleeting perceptual experiences that occur while an individual is falling asleep or waking, respectively.⁴⁹ Because by definition visual hallucinations occur while the individual is fully awake, categorizing hallucination-like experiences such as hypnagogia and hypnopompia is difficult, especially since these are similar to other states in which alterations in perception are expected (namely a dream state). They are commonly associated with sleep disorders such as narcolepsy, cataplexy, and sleep paralysis.^50,51 In a study of 13,057 individuals in the general population, Ohayon et al⁴ found the overall prevalence of hypnagogic or hypnopompic hallucinations was 24.8% (5.3% visual) and 6.6% (1.5% visual), respectively. Approximately one-third of participants reported having experienced ≥1 hallucinatory experience in their lifetime, regardless of being asleep or awake.⁴ There was a higher prevalence of hypnagogic/hypnopompic experiences among those who also reported daytime hallucinations or other psychotic features.

Content and associated signs/symptoms. Unfortunately, because of the frequent co-occurrence of sleep disorders and psychiatric conditions, as well as the general paucity of research, it is difficult to characterize the visual phenomenology of hypnagogic/hypnopompic hallucinations. Some evidence suggests the nature of the perception of the objects hallucinated is substantially impacted by the presence of preexisting psychotic symptoms. Insight into the reality of these hallucinations also depends upon the presence of comorbid psychiatric disease. Hypnagogic/hypnopompic hallucinations are often described as complex, colorful, vivid, and dream-like, as if the patient was in a “half sleep” state.⁵² They are usually described as highly detailed events involving people and/or animals, though they may be grotesque in nature. Perceived entities are often described as undergoing a transformation or being mobile in their environment. Rarely do these perceptions invoke emotion or change the patient’s beliefs. Hypnagogia/hypnopompia also often have an auditory or haptic component to them. Visual phenomena can either appear to take place within an alternative background environment or appear superimposed on the patient’s actual physical environment.

How to determine the cause

In many of the studies cited in this review, the participants had a considerable amount of psychiatric comorbidity, which makes it difficult to discriminate between pure neurologic and pure psychiatric causes of hallucinations. Though the visual content of the hallucinations (people, objects, shapes, lights) can help clinicians broadly differentiate causes, many other characteristics of both the hallucinations and the patient can help determine the cause (Table^{3,4,12-39,41-52}). The most useful characteristics for discerning the etiology of an individual’s visual hallucinations are the patient’s age, the visual field in which the hallucination occurs, and the complexity/simplicity of the hallucination.

Patient age. Hallucinations associated with primary psychosis decrease with age. The average age of onset of migraine with aura is 21. Occipital lobe seizures occur in early childhood to age 40, but most commonly occur in the second decade.^32,36 No trend in age can be reliably determined in individuals who experience hypnagogia/hypnopompia. In contrast, other potential causes of visual hallucinations, such as delirium, neurodegenerative disease, eye disease, and peduncular hallucinosis, are more commonly associated with advanced age.

Continue to: The visual field(s)

The visual field(s) in which the hallucination occurs can help differentiate possible causes in patients with seizure, brain tumor, migraine, or visual impairment. In patients with psychosis, delirium, peduncular hallucinosis, or hypnagogia/hypnopompia, hallucinations can occur in any visual field. Those with neurodegenerative disease, particularly PD, commonly describe seeing so-called passage hallucinations and presence hallucinations, which occur outside of the patient’s direct vision. Visual hallucinations associated with seizure are often unilateral (homonymous left or right hemifield), and contralateral to the affected neurologic structures in the visual neural pathway; they start in the left or right peripheral vision and gradually move to the central visual field. In hallucinations experienced by patients with brain tumors, the hallucinated entities typically appear on the visual field contralateral to the underlying tumor. Visual hallucinations seen in migraine often include a figure that moves from central vision to more lateral in the visual field. The visual hallucinations seen in eye disease (namely Charles Bonnet syndrome) are almost exclusively perceived in the visual fields affected by decreased visual acuity, though non-side-locked visual hallucinations are common in patients with age-related macular degeneration.

Content and complexity. The visual hallucinations perceived in those with psychosis, delirium, neurodegenerative disease, and sleep disorders are generally complex. These hallucinations tend to be of people, animals, scenes, or faces and include color and associated sound, with moving parts and interactivity with either the patient or the environment. These are in contrast to the simple visual hallucinations of visual cortex seizures, brain tumors, and migraine aura, which are often reported as brightly colored or black/white lights, flashes, and shapes, with or without associated auditory, olfactory, or somatic sensation. Furthermore, hallucinations due to seizure and brain tumor (also likely due to seizure) are often of brightly colored shapes and lights with curved edges, while patients with migraine more commonly report singular sparkling black/white objects with straight lines.

Bottom Line

Though there are no features known to be specific to only 1 cause of visual hallucinations, some characteristics of both the patient and the hallucinations can help direct the diagnostic differential. The most useful characteristics are the patient’s age, the visual field in which the hallucination occurs, and the complexity/ simplicity of the hallucination.

Related Resources

• Wang J, Patel D, Francois D. Elaborate hallucinations, but is it a psychotic disorder? Current Psychiatry. 2021;20(2):46-50. doi:10.12788/cp.0091
• O’Brien J, Taylor JP, Ballard C, et al. Visual hallucinations in neurological and ophthalmological disease: pathophysiology and management. J Neurol Neurosurg Psychiatry. 2020; 91(5):512-519. doi:10.1136/jnnp-2019-322702

A visual hallucination is a visual percept experienced when awake that is not elicited by an external stimulus. Historically, hallucinations have been synonymous with psychiatric disease, most notably schizophrenia; however, over recent decades, hallucinations have been categorized based on their underlying etiology as psychodynamic (primary psychiatric), psychophysiologic (primary neurologic/structural), and psychobiochemical (neurotransmitter dysfunction).¹ Presently, visual hallucinations are known to be caused by a wide variety of primary psychiatric, neurologic, ophthalmologic, and chemically-mediated conditions. Despite these causes, clinically differentiating the characteristics and qualities of visual hallucinations is often a lesser-known skillset among clinicians. The utility of this skillset is important for the clinician’s ability to differentiate the expected and unexpected characteristics of visual hallucinations in patients with both known and unknown neuropsychiatric conditions.

Though many primary psychiatric and neurologic conditions have been associated with and/or known to cause visual hallucinations, this review focuses on the following grouped causes:

• Primary psychiatric causes: psychiatric disorders with psychotic features and delirium; and
• Primary neurologic causes: neurodegenerative disease/dementias, seizure disorders, migraine disorders, vision loss, peduncular hallucinosis, and hypnagogic/hypnopompic phenomena.

Because the accepted definition of visual hallucinations excludes visual percepts elicited by external stimuli, drug-induced hallucinations would not qualify for either of these categories. Additionally, most studies reporting on the effects of drug-induced hallucinations did not control for underlying comorbid psychiatric conditions, dementia, or delirium, and thus the results cannot be attributed to the drug alone, nor is it possible to identify reliable trends in the properties of the hallucinations.² The goals of this review are to characterize visual hallucinations experienced as a result of primary psychiatric and primary neurologic conditions and describe key grouping and differentiating features to help guide the diagnosis.

Visual hallucinations in the general population

A review of 6 studies (N = 42,519) reported that the prevalence of visual hallucinations in the general population is 7.3%.³ The prevalence decreases to 6% when visual hallucinations arising from physical illness or drug/chemical consumption are excluded. The prevalence of visual hallucinations in the general population has been associated with comorbid anxiety, stress, bereavement, and psychotic pathology.^4,5 Regarding the age of occurrence of visual hallucinations in the general population, there appears to be a bimodal distribution.³ One peak appears in later adolescence and early adulthood, which corresponds with higher rates of psychosis, and another peak occurs late in life, which corresponds to a higher prevalence of neurodegenerative conditions and visual impairment.

Primary psychiatric causes

Most studies of visual hallucinations in primary psychiatric conditions have specifically evaluated patients with schizophrenia and mood disorders with psychotic features.^6,7 In a review of 29 studies (N = 5,873) that specifically examined visual hallucinations in individuals diagnosed with schizophrenia, Waters et al³ found a wide range of reported prevalence (4% to 65%) and a weighted mean prevalence of 27%. In contrast, the prevalence of auditory hallucinations in these participants ranged from 25% to 86%, with a weighted mean of 59%.³

Hallucinations are a known but less common symptom of mood disorders that present with psychotic features.⁸ Waters et al³ also examined the prevalence of visual and auditory hallucinations in mood disorders (including mania, bipolar disorder, and depression) reported in 12 studies (N = 2,892).³ They found the prevalence of visual hallucinations in patients with mood disorders ranged from 6% to 27%, with a weighted mean of 15%, compared to the weighted mean of 28% who experienced auditory hallucinations. Visual hallucinations in primary psychiatric conditions are associated with more severe disease, longer hospitalizations, and poorer prognoses.^9-11

Visual hallucinations of psychosis

In patients with psychotic symptoms, the characteristics of the visually hallucinated entity as well as the cognitive and emotional perception of the hallucinations are notably different than in patients with other, nonpsychiatric causes of visual hallucations.³

Continue to: Content and perceived physical properties

Content and perceived physical properties. Hallucinated entities are most often perceived as solid, 3-dimensional, well-detailed, life-sized people, animals, and objects (often fire) or events existing in the real world.³ The entity is almost always perceived as real, with accurate form and color, fine edges, and shadow; is often out of reach of the perceiver; and can be stationary or moving within the physical properties of the external environment.³

Timing and triggers. The temporal properties vary widely. Hallucinations can last from seconds to minutes and occur at any time of day, though by definition, they must occur while the individual is awake.³ Visual hallucinations in psychosis are more common during times of acute stress, strong emotions, and tiredness.³

Patient reaction and belief. Because of realistic qualities of the visual hallucination and the perception that it is real, patients commonly attempt to participate in some activity in relation to the hallucination, such as moving away from or attempting to interact with it.³ Additionally, patients usually perceive the hallucinated entity as uncontrollable, and are surprised when the entity appears or disappears. Though the content of the hallucination is usually impersonal, the meaning the patient attributes to the presence of the hallucinated entity is usually perceived as very personal and often requiring action. The hallucination may represent a harbinger, sign, or omen, and is often interpreted religiously or spiritually and accompanied by comorbid delusions.³

Visual hallucinations of delirium

Delirium is a syndrome of altered mentation—most notably consciousness, attention, and orientation—that occurs as a result of ≥1 metabolic, infectious, drug-induced, or other medical conditions and often manifests as an acute secondary psychotic illness.¹² Multiple patient and environmental characteristics have been identified as risk factors for developing delirium, including multiple and/or severe medical illnesses, preexisting dementia, depression, advanced age, polypharmacy, having an indwelling urinary catheter, impaired sight or hearing, and low albumin levels.^13-15 The development of delirium is significantly and positively associated with regular alcohol use, benzodiazepine withdrawal, and angiotensin receptor blocker and dopamine receptor agonist usage.¹⁵ Approximately 40% of patients with delirium have symptoms of psychosis, and in contrast to the hallucinations experienced by patients with schizophrenia, visual hallucinations are the most common type of hallucinations seen in delirium (27%).¹³ In a 2021 review that included 602 patients with delirium, Tachibana et al¹⁵ found that approximately 26% experienced hallucinations, 92% of which were visual hallucinations.

Content, perceived physical properties, and reaction. Because of the limited attention and cognitive function of patients with delirium, less is known about the content of their visual hallucinations. However, much like those with primary psychotic symptoms, patients with delirium often report seeing complex, normal-sized, concrete entities, most commonly people. Tachibana et al¹⁵ found that the hallucinated person is more often a stranger than a familiar person, but (rarely) may be an ethereal being such as a devil or ghost. The next most common visually hallucinated entities were creatures, most frequently insects and animals. Other common hallucinations were visions of events or objects, such as fires, falling ceilings, or water. Similar to those with primary psychotic illness such as schizophrenia, patients with delirium often experience emotional distress, anxiety, fear, and confusion in response to the hallucinated person, object, and/or event.¹⁵

Continue to: Primary neurologic causes

Visual hallucinations in neurodegenerative diseases

Patients with neurodegenerative diseases such as Parkinson disease (PD), dementia with Lewy bodies (DLB), or Creutzfeldt-Jakob disease (CJD) commonly experience hallucinations as a feature of their condition. However, the true cause of these hallucinations often cannot be directly attributed to any specific pathophysiology because these patients often have multiple coexisting risk factors, such as advanced age, major depressive disorder, use of neuroactive medications, and co-occurring somatic illness. Though the prevalence of visual hallucinations varies widely between studies, with 15% to 40% reported in patients with PD, the prevalence roughly doubles in patients with PD-associated dementia (30% to 60%), and is reported by 60% to 90% of those with DLB.^16-18 Hallucinations are generally thought to be less common in Alzheimer disease; such patients most commonly experience visual hallucinations, although the reported prevalence ranges widely (4% to 59%).^19,20 Notably, similarly to hallucinations experienced in patients with delirium, and in contrast to those with psychosis, visual hallucinations are more common than auditory hallucinations in neurodegenerative diseases.²⁰ Hallucinations are not common in individuals with CJD but are a key defining feature of the Heidenhain variant of CJD, which makes up approximately 5% of cases.²¹

Content, perceived physical properties, and reaction. Similar to the visual hallucinations experienced by patients with psychosis or delirium, those experienced in patients with PD, DLB, or CJD are often complex, most commonly of people, followed by animals and objects. The presence of “passage hallucinations”—in which a person or animal is seen in a patient’s peripheral vision, but passes out of their visual field before the entity can be directly visualized—is common.²⁰ Those with PD also commonly have visual hallucinations in which the form of an object appears distorted (dysmorphopsia) or the color of an object appears distorted (metachromatopsia), though these would better be classified as illusions because a real object is being perceived with distortion.²²

Hallucinations are more common in the evening and at night. “Presence hallucinations” are a common type of hallucination that cannot be directly related to a specific sensory modality such as vision, though they are commonly described by patients with PD as a seen or perceived image (usually a person) that is not directly in the individual’s visual field.¹⁷ These presence hallucinations are often described as being behind the patient or in a visualized scene of what was about to happen. Before developing the dementia and myoclonus also seen in sporadic CJD, patients with the Heidenhain variant of CJD describe illusions such as metachromatopsia, dysmorphia, and micropsia that eventually develop into frank visual hallucinations, which have been poorly reported in medical literature.^22,23 There are no generalizable trends in the temporal nature of visual hallucinations in patients with neuro­degenerative diseases. In most cases of visual hallucinations in patients with PD and dementia, insight relating to the perception varies widely based on the patient’s cognitive status. Subsequently, patients’ reactions to the hallucinations also vary widely.

Visual hallucinations in epileptic seizures

Occipital lobe epilepsies represent 1% to 4.6% of all epilepsies; however, these represent 20% to 30% of benign childhood partial epilepsies.^24,25 These are commonly associated with various types of visual hallucinations depending upon the location of the seizure onset within the occipital lobe. These are referred to as visual auras.²⁶ Visual auras are classified into simple visual hallucinations, complex visual hallucinations, visual illusions, and ictal amaurosis (hemifield blindness or complete blindness).

Content, perceived physical properties, and reaction. Simple visual hallucinations are often described as brief, stereotypical flashing lights of various shapes and colors. These images may flicker, change shape, or take on a geometric or irregular pattern. Appearances can be repetitive and stereotyped, are often reported as moving horizontally from the periphery to the center of the visual field, and can spread to the entire visual field. Most often, these hallucinations occur for 5 to 30 seconds, and have no discernible provoking factors. Complex visual hallucinations consist of formed images of animals, people, or elaborate scenes. These are believed to reflect activation of a larger area of cortex in the temporo-parieto-occipital region, which is the visual association cortex. Very rarely, occipital lobe seizures can manifest with ictal amaurosis.²⁴

Continue to: Simple visual auras...

Simple visual auras have a very high localizing value to the occipital lobe. The primary visual cortex (Brodmann area 17) is situated in the banks of calcarine fissure and activation of this region produces these simple hallucinations. If the hallucinations are consistently lateralized, the seizures are very likely to be coming from the contralateral occipital lobe.

Visual hallucinations in brain tumors

In general, a tumor anywhere along the optic path can produce visual hallucinations; however, the exact causal mechanism of the hallucinations is unknown. Moreover, tumors in different locations—namely the occipital lobes, temporal lobes, and frontal lobes—appear to produce visual hallucinations with substantially different characteristics.^27-29 Further complicating the search for the mechanism of these hallucinations is the fact that tumors are epileptogenic. In addition, 36% to 48% of patients with brain tumors have mood symptoms (depression/mania), and 22% to 24% have psychotic symptoms (delusions/hallucinations); these symptoms are considerably location-dependent.^30-32

Content and associated signs/symptoms. There are some grouped symptoms and/or hallucination characteristics associated with cerebral tumors in different lobes of the brain, though these symptoms are not specific. The visual hallucinations associated with brain tumors are typically confined to the field of vision that corresponds to the location of the tumor. Additionally, many such patients have a baseline visual field defect to some extent due to the tumor location.

In patients with occipital lobe tumors, visual hallucinations closely resemble those experienced in occipital lobe seizures, specifically bright flashes of light in colorful simple and complex shapes. Interestingly, those with occipital lobe tumors report xanthopsia, a form of chromatopsia in which objects in their field of view appear abnormally colored a yellowish shade.^26,27

In patients with temporal lobe tumors, more complex visual hallucinations of people, objects, and events occurring around them are often accompanied by auditory hallucinations, olfactory hallucinations, and/or anosmia.²⁸In those with frontal lobe tumors, similar complex visual hallucinations of people, objects, and events are seen, and olfactory hallucinations and/or anosmia are often experienced. However, these patients often have a lower likelihood of experiencing auditory hallucinations, and a higher likelihood of developing personality changes and depression than other psychotic symptoms. The visual hallucinations experienced in those with frontal lobe tumors are more likely to have violent content.²⁹

Continue to: Visual hallucinations in migraine with aura

Visual hallucinations in migraine with aura

The estimated prevalence of migraine in the general population is 15% to 29%; 31% of those with migraine experience auras.^33-35 Approximately 99% of those with migraine auras experience some type of associated visual phenomena.^33,36 The pathophysiology of migraine is believed to be related to spreading cortical depression, in which a slowly propagating wave of neuroelectric depolarization travels over the cortex, followed by a depression of normal brain activity. Visual aura is thought to occur due to the resulting changes in cortical activity in the visual cortex; however, the exact electro­physiology of visual migraine aura is not entirely known.^37,38 Though most patients with visual migraine aura experience simple visual hallucinations, complex hallucinations have been reported in the (very rare) cases of migraine coma and familial hemiplegic migraine.³⁹

Content and associated signs/symptoms. The most common hallucinated entities reported by patients with migraine with aura are zigzag, flashing/sparkling, black and white curved figure(s) in the center of the visual field, commonly called a scintillating phosphene or scintillating scotoma.³⁶ The perceived entity is often singular and gradually moves from the center to the periphery of the visual field. These visual hallucinations appear in front of all other objects in the visual field and do not interact with the environment or observer, or resemble or morph into any real-world objects, though they may change in contour, size, and color. The scintillating nature of the hallucination often resolves within minutes, usually leaving a scotoma, or area of vision loss, in the area, with resolution back to baseline vision within 1 hour. The straight, zigzag, and usually black-and-white nature of the scintillating phosphenes of migraine are in notable contrast to the colorful, often circular visual hallucinations experienced in patients with occipital lobe seizures.²⁵

Visual hallucinations in peduncular hallucinosis

Peduncular hallucinosis is a syndrome of predominantly dreamlike visual hallucinations that occurs in the setting of lesions in the midbrain and/or thalamus.⁴⁰ A recent review of the lesion etiology found that approximately 63% are caused by focal infarction and approximately 15% are caused by mass lesions; subarachnoid hemorrhage, intracerebral hemorrhage, and demyelination cause approximately 5% of cases each.⁴⁰ Additionally, a review of the affected brainstem anatomy showed almost all lesions were found in the paramedian reticular formations of the midbrain and pons, with the vast majority of lesions affecting or adjacent to the oculomotor and raphe nuclei of the midbrain.³⁹ Due to the commonly involved visual pathway, some researchers have suggested these hallucinations may be the result of a release phenomenon.³⁹

Content and associated signs/symptoms. The visual hallucinations of peduncular hallucinosis usually start 1 to 5 days after the causal lesion forms, last several minutes to hours, and most stop after 1 to 3 weeks; however, cases of hallucinations lasting for years have been reported. These hallucinations have a diurnal pattern of usually appearing while the patient is resting in the evening and/or preparing for sleep. The characteristics of visual hallucinations vary widely from simple distortions in how real objects appear to colorful and vivid hallucinated events and people who can interact with the observer. The content of the visual hallucinations often changes in nature during the hallucination, or from one hallucination to the next. The hallucinated entities can be worldly or extraterrestrial. Once these patients fall asleep, they often have equally vivid and unusual dreams, with content similar to their visual hallucinations. Due to the anatomical involvement of the nigrostriatal pathway and oculomotor nuclei, co-occurring parkinsonism, ataxia, and oculomotor nerve palsy are common and can be a key clinical feature in establishing the diagnosis. Though patients with peduncular hallucinations commonly fear their hallucinations, they often eventually gain insight, which eases their anxiety.³⁹

Other causes

Visual hallucinations in visual impairment

Visual hallucinations are a diagnostic requirement for Charles Bonnet syndrome, in which individuals with vision loss experience visual hallucinations in the corresponding field of vision loss.⁴¹ A lesion at any point in the visual pathway that produces visual loss can lead to Charles Bonnet syndrome; however, age-related macular degeneration is the most common cause.⁴² The hallucinations of Charles Bonnet syndrome are believed to be a release phenomenon, given the defective visual pathway and resultant dysfunction in visual processing. The prevalence of Charles Bonnet syndrome ranges widely by study. Larger studies report a prevalence of 11% to 27% in patients with age-related macular degeneration, depending on the severity of vision loss.^43,44 Because there are many causes of Charles Bonnet syndrome, and because a recent study found that only 15% of patients with this syndrome told their eye care clinician and that 21% had not reported their hallucinatory symptoms to anyone, the true prevalence is unknown.⁴² Though the onset of visual hallucinations correlates with the onset of vision loss, there appears to be no association between the nature or complexity of the hallucinations and the severity or progression of the patient’s vision loss.⁴⁵ Some studies have reported either the onset of or a higher frequency of visual hallucinations at a time of visual recovery (for example, treatment or exudative age-related macular degeneration), which suggests that hallucinations may be triggered by fluctuations in visual acuity.^46,47 Additional risk factors for experiencing visual hallucinations in the setting of visual pathway deficit include a history of stroke, social isolation, poor cognitive function, poor lighting, and age ≥65.

Continue to: Content and associated signs/symptoms

Content and associated signs/symptoms. The visual hallucinations of patients with Charles Bonnet syndrome appear almost exclusively in the defective visual field. Images tend to be complex, colored, with moving parts, and appear in front of the patient. The hallucinations are usually of familiar or normal-appearing people or mundane objects, and as such, the patient often does not realize the hallucinated entity is not real. In patients without comorbid psychiatric disease, visual hallucinations are not accompanied by any other types of hallucinations. The most commonly hallucinated entities are people, followed by simple visual hallucinations of geometric patterns, and then by faces (natural or cartoon-like) and inanimate objects. Hallucinations most commonly occur daily or weekly, and upon waking. These hallucinations most often last several minutes, though they can last just a few seconds or for hours. Hallucinations are usually emotionally neutral, but most patients report feeling confused by their appearance and having a fear of underlying psychiatric disease. They often gain insight to the unreal nature of the hallucinations after counseling.⁴⁸

Visual hallucinations at the sleep/wake interface

Hypnagogic and hypnopompic hallucinations are fleeting perceptual experiences that occur while an individual is falling asleep or waking, respectively.⁴⁹ Because by definition visual hallucinations occur while the individual is fully awake, categorizing hallucination-like experiences such as hypnagogia and hypnopompia is difficult, especially since these are similar to other states in which alterations in perception are expected (namely a dream state). They are commonly associated with sleep disorders such as narcolepsy, cataplexy, and sleep paralysis.^50,51 In a study of 13,057 individuals in the general population, Ohayon et al⁴ found the overall prevalence of hypnagogic or hypnopompic hallucinations was 24.8% (5.3% visual) and 6.6% (1.5% visual), respectively. Approximately one-third of participants reported having experienced ≥1 hallucinatory experience in their lifetime, regardless of being asleep or awake.⁴ There was a higher prevalence of hypnagogic/hypnopompic experiences among those who also reported daytime hallucinations or other psychotic features.

Content and associated signs/symptoms. Unfortunately, because of the frequent co-occurrence of sleep disorders and psychiatric conditions, as well as the general paucity of research, it is difficult to characterize the visual phenomenology of hypnagogic/hypnopompic hallucinations. Some evidence suggests the nature of the perception of the objects hallucinated is substantially impacted by the presence of preexisting psychotic symptoms. Insight into the reality of these hallucinations also depends upon the presence of comorbid psychiatric disease. Hypnagogic/hypnopompic hallucinations are often described as complex, colorful, vivid, and dream-like, as if the patient was in a “half sleep” state.⁵² They are usually described as highly detailed events involving people and/or animals, though they may be grotesque in nature. Perceived entities are often described as undergoing a transformation or being mobile in their environment. Rarely do these perceptions invoke emotion or change the patient’s beliefs. Hypnagogia/hypnopompia also often have an auditory or haptic component to them. Visual phenomena can either appear to take place within an alternative background environment or appear superimposed on the patient’s actual physical environment.

How to determine the cause

In many of the studies cited in this review, the participants had a considerable amount of psychiatric comorbidity, which makes it difficult to discriminate between pure neurologic and pure psychiatric causes of hallucinations. Though the visual content of the hallucinations (people, objects, shapes, lights) can help clinicians broadly differentiate causes, many other characteristics of both the hallucinations and the patient can help determine the cause (Table^{3,4,12-39,41-52}). The most useful characteristics for discerning the etiology of an individual’s visual hallucinations are the patient’s age, the visual field in which the hallucination occurs, and the complexity/simplicity of the hallucination.

Patient age. Hallucinations associated with primary psychosis decrease with age. The average age of onset of migraine with aura is 21. Occipital lobe seizures occur in early childhood to age 40, but most commonly occur in the second decade.^32,36 No trend in age can be reliably determined in individuals who experience hypnagogia/hypnopompia. In contrast, other potential causes of visual hallucinations, such as delirium, neurodegenerative disease, eye disease, and peduncular hallucinosis, are more commonly associated with advanced age.

Continue to: The visual field(s)

The visual field(s) in which the hallucination occurs can help differentiate possible causes in patients with seizure, brain tumor, migraine, or visual impairment. In patients with psychosis, delirium, peduncular hallucinosis, or hypnagogia/hypnopompia, hallucinations can occur in any visual field. Those with neurodegenerative disease, particularly PD, commonly describe seeing so-called passage hallucinations and presence hallucinations, which occur outside of the patient’s direct vision. Visual hallucinations associated with seizure are often unilateral (homonymous left or right hemifield), and contralateral to the affected neurologic structures in the visual neural pathway; they start in the left or right peripheral vision and gradually move to the central visual field. In hallucinations experienced by patients with brain tumors, the hallucinated entities typically appear on the visual field contralateral to the underlying tumor. Visual hallucinations seen in migraine often include a figure that moves from central vision to more lateral in the visual field. The visual hallucinations seen in eye disease (namely Charles Bonnet syndrome) are almost exclusively perceived in the visual fields affected by decreased visual acuity, though non-side-locked visual hallucinations are common in patients with age-related macular degeneration.

Content and complexity. The visual hallucinations perceived in those with psychosis, delirium, neurodegenerative disease, and sleep disorders are generally complex. These hallucinations tend to be of people, animals, scenes, or faces and include color and associated sound, with moving parts and interactivity with either the patient or the environment. These are in contrast to the simple visual hallucinations of visual cortex seizures, brain tumors, and migraine aura, which are often reported as brightly colored or black/white lights, flashes, and shapes, with or without associated auditory, olfactory, or somatic sensation. Furthermore, hallucinations due to seizure and brain tumor (also likely due to seizure) are often of brightly colored shapes and lights with curved edges, while patients with migraine more commonly report singular sparkling black/white objects with straight lines.

Bottom Line

Though there are no features known to be specific to only 1 cause of visual hallucinations, some characteristics of both the patient and the hallucinations can help direct the diagnostic differential. The most useful characteristics are the patient’s age, the visual field in which the hallucination occurs, and the complexity/ simplicity of the hallucination.

Related Resources

• Wang J, Patel D, Francois D. Elaborate hallucinations, but is it a psychotic disorder? Current Psychiatry. 2021;20(2):46-50. doi:10.12788/cp.0091
• O’Brien J, Taylor JP, Ballard C, et al. Visual hallucinations in neurological and ophthalmological disease: pathophysiology and management. J Neurol Neurosurg Psychiatry. 2020; 91(5):512-519. doi:10.1136/jnnp-2019-322702

Nutritional deficiencies are one of the many causes of or contributors to symptoms in patients with psychiatric disorders. In this article, we discuss the prevalence of iron deficiency and its link to poor mental health, and how proper treatment may improve psychiatric symptoms. We also offer suggestions for how and when to test for and treat iron deficiency in psychiatric patients.

A common condition

Iron deficiency is the most common mineral deficiency in the world. According to the World Health Organization (WHO), approximately 25% of the global population is anemic and nearly one-half of those cases are the result of iron deficiency.¹ While the WHO has published guidelines defining iron deficiency as it relates to ferritin levels (<15 ug/L in adults and <12 ug/L in children), this estimate might be low.^2,3 Mei et al² found that hemoglobin and soluble transferrin receptors can be used to determine iron-deficient erythropoiesis, which indicates a physiological definition of iron deficiency. According to a study of children and nonpregnant women by Mei et al,² children with ferritin levels <20 ug/L and women with ferritin levels <25 ug/L should be considered iron-deficient. If replicated, this study suggests the prevalence of iron deficiency is higher than currently estimated.² Overall, an estimated 1.2 billion people worldwide have iron-deficiency anemia.⁴ Additionally, patients can be iron deficient without being anemic, a condition thought to be at least twice as common.⁴

Essential for brain function

Research shows the importance of iron to proper brain function.⁵ Iron deficiency in pregnant women is associated with significant neuropsychological impairments in neonates. Rodent studies have demonstrated the importance of iron and the effects of iron deficiency on the hippocampus, corpus striatum, and production of monoamines.⁵ Specifically, iron is a necessary cofactor in the enzymes tryptophan hydroxylase and tyrosine hydroxylase, which produce serotonin, dopamine, and norepinephrine. In rodent studies, monoamine deficits secondary to iron deficiency persist into adulthood even with iron supplementation, which highlights the importance of preventing iron deficiency during pregnancy and early life.⁵ While most research has focused on the impact of iron deficiency in infancy and early childhood, iron deficiency has an ongoing impact into adulthood, even if treated.⁶

Iron deficiency and psychiatric symptoms

Current research suggests an association between iron deficiency or low ferritin levels and psychiatric disorders, specifically depression, anxiety, and schizophrenia. In a web survey of 11,876 adults, Hidese et al⁷ found an association between a self-reported history of iron deficiency anemia and a self-reported history of depression. Another study of 528 municipal employees found an association between low serum ferritin concentrations and a high prevalence of depressive symptoms among men; no statistically significant association was detected in women.⁸ In an analysis of the Taiwan National Health Insurance Database from 2000 to 2012, Lee et al⁹ found a statistically significant increased risk of anxiety disorders, depression, sleep disorders, and psychotic disorders in patients with iron deficiency anemia after controlling for multiple confounders. Xu et al¹⁰ used quantitative susceptibility mapping to assess the iron status in certain regions of the brain of 30 patients with first-episode psychosis. They found lower levels of iron in the bilateral substantia nigra, left red nucleus, and left thalamus compared to healthy controls.¹⁰ Kim et al¹¹ found an association between iron deficiency and more severe negative symptoms in 121 patients with first-episode psychosis, which supports the hypothesis that iron deficiency may alter dopamine transmission in the brain.

Iron deficiency has been associated with psychopathology across the lifespan. In a population-based study in Taiwan, Chen et al¹² found an association between iron deficiency anemia and psychiatric disorders in children and adolescents, including mood disorders, autism spectrum disorder, attention-deficit/hyperactivity disorder, and developmental disorders. At the other end of the age spectrum, in a survey of 1,875 older adults in England, Stewart et al¹³ found an association between low ferritin levels (<45 ng/mL) and depressive symptoms after adjusting for demographic factors and overall health status.

In addition to specific psychiatric disorders and symptoms, iron deficiency is often associated with nonspecific symptoms such as fatigue.¹⁴ Fatigue is a symptom of numerous psychiatric disorders and is included in the DSM diagnostic criteria for major depressive disorder and generalized anxiety disorder.¹⁵

Iron supplementation might improve psychiatric symptoms

Some evidence suggests that using iron supplementation to treat iron deficiency can improve psychiatric symptoms. In a 2013 systematic literature review of 10 studies, Greig et al¹⁶ found a link between low iron status and poor cognition, poor mental health scores, and fatigue among women of childbearing age. In this review, 7 studies demonstrated improvement in cognition and 3 demonstrated improvement in mental health with iron supplementation.¹⁶ In a 2021 prospective study, 19 children and adolescents age 6 to 15 who had serum ferritin levels <30 ng/mL were treated with oral iron supplementation for 12 weeks.¹⁷ Participants showed significant improvements in sleep quality, depressive symptoms, and general mood as assessed via the Pittsburgh Sleep Quality Index, Center for Epidemiologic Studies Depression Scale, and Profile of Mood States (POMS) questionnaires, respectively.¹⁷ A randomized controlled trial of 219 female soldiers who were given iron supplementation or placebo for 8 weeks during basic combat training found that compared to placebo, iron supplementation led to improvements in mood as measured by the POMS questionnaire.¹⁸ Lastly, in a 2016 observational study of 412 adult psychiatric patients, Kassir¹⁹ found most patients (81%) had iron deficiency, defined as a transferrin saturation coefficient <30% or serum ferritin <100 ng/mL. Although these cutoffs are not considered standard and thus may have overrepresented the percentage of patients considered iron-deficient, more than one-half of patients considered iron-deficient in this study experienced a reduction or elimination of psychiatric symptoms following treatment with iron supplementation and/or psychotropic medications.¹⁹

Continue to: Individuals with iron deficiency...

Individuals with iron deficiency without anemia also may see improvement in psychiatric symptoms with iron treatment. In a 2018 systematic review, Houston et al²⁰ evaluated iron supplementation in 1,170 adults who were iron-deficient but not anemic. They found that in these patients, fatigue significantly improved but physical capacity did not.²⁰ Additionally, 2 other studies found iron treatment improved fatigue in nonanemic women.^21,22 In a 2016 systematic review, Pratt et al²³ concluded, “There is emerging evidence that … nonanemic iron deficiency … is a disease in its own right, deserving of further research in the development of strategies for detection and treatment.” Al-Naseem et al²⁴ suggested severity distinguishes iron deficiency with and without anemia.

Your role in assessing and treating iron deficiency

Testing for and treating iron deficiency generally is not a part of routine psychiatric practice. This might be due to apathy given the pervasiveness of iron deficiency, a belief that iron deficiency should be managed by primary care physicians, or a lack of familiarity with how to treat it and the benefits of such treatment for psychiatric patients. However, assessing for and treating iron deficiency in psychiatric patients is important, especially for individuals who are highly susceptible to inadequate iron levels. People at risk for iron deficiency include pregnant women, infants, young children, women with heavy menstrual bleeding, frequent blood donors, patients with cancer, individuals who have gastrointestinal (GI) surgeries or disorders, and those with heart failure.²⁵

Assessment. Iron status can be assessed through an iron studies panel. Because a patient can have iron deficiency without anemia, a complete blood count (CBC) alone does not suffice.²⁶ The iron panel includes serum iron, serum ferritin, serum transferrin or total iron-binding capacity (TIBC), and calculated transferrin saturation (TSAT), which is the ratio of serum iron to TIBC.

Iron deficiency is diagnosed if ferritin is <30 ng/mL, regardless of the hemoglobin concentration or underlying condition, and confirmed by a low TSAT.²⁶ In most guidelines, the cutoff value for TSAT for iron deficiency is <20%. Because the TSAT can be influenced by iron supplements or iron-rich foods, wait several hours to obtain blood after a patient takes an oral iron supplement or eats iron-rich foods. If desired, clinicians can use either ferritin or TSAT alone to diagnose iron deficiency. However, because ferritin can be falsely normal in inflammatory conditions such as obesity and infection, a TSAT may be needed to confirm iron deficiency if there is a high clinical suspicion despite a normal ferritin level.²⁶

Treatment. If iron deficiency is confirmed, instruct your patient to follow up with their primary care physician or the appropriate specialist to evaluate for any underlying etiologies.

Continue to: Iron deficiency should be treated...

Iron deficiency should be treated with supplementation because diet alone is insufficient for replenishing iron stores. Iron replacement can be oral or IV. Oral replacement is effective, safe, inexpensive, easy to obtain, and easy to administer.²⁷ Oral replacement is recommended for adults whose anemia is not severe or who do not have a comorbid condition such as pregnancy, inflammatory bowel conditions, gastric surgery, or chronic kidney disease. When anemia is severe or a patient has one of these comorbid conditions, IV is the preferred method of replacement.²⁷ In these cases, defer treatment to the patient’s primary care physician or specialist. 

There are no clear recommendations on the amount of iron per dose to prescribe.²⁷ The maximum amount of oral iron that can be absorbed is approximately 25 mg/d of elemental iron. A 325 mg ferrous sulfate tablet contains 65 mg of elemental iron, of which approximately 25 mg is absorbed and utilized.²⁷

Emerging evidence suggests that excessive iron dosing may reduce iron absorption and increase adverse effects. In a study of 54 nonanemic young women with iron deficiency who were given iron supplementation, Moretti et al²⁸ found that a large oral dose of iron taken in the morning increased hepcidin, which decreased the absorption of iron taken later for up to 48 hours. They found that 40 to 80 mg of elemental iron given on alternate days may maximize the fractional iron absorbed, increase dosage efficacy, reduce GI exposure to unabsorbed iron, and improve patients’ ability to tolerate iron supplementation.²⁸

Adverse effects from iron supplements occur in up to 70% of patients.²⁷ These can include metallic taste, nausea, vomiting, flatulence, diarrhea, epigastric pain, constipation, and dark stools.²⁷ Using a liquid form may help reduce adverse effects because it can be more easily titrated.²⁷ Tell patients to avoid enteric-coated or sustained-release iron capsules because these are poorly absorbed. Be cautious when prescribing iron supplementation to older adults because these patients tend to have more adverse effects, especially constipation, as well as reduced absorption, and may ultimately need IV treatment. Iron should not be taken with food, calcium supplements, antacids, coffee, tea, or milk.²⁷

The amount of iron present, cost, and adverse effects vary by supplement. The Table^27,29-33 provides more information on available forms of iron. Many forms of iron supplementation are available over-the-counter, and most are equally effective.²⁷ Advise patients to use iron products that have been tested by an independent company, such as ConsumerLab.com. Such companies evaluate products to see if they contain the amount of iron listed on the product’s label; for contamination with lead, cadmium, or arsenic; and for the product’s ability to break apart for absorption.³⁴

Six to 8 weeks of treatment with oral iron supplementation may be necessary before anemia is fully resolved, and it may take up to 6 months for iron stores to be repleted.²⁷ If a patient cannot tolerate an iron supplement, reducing the dose or taking it with meals may help prevent adverse effects, but also will reduce absorption. Auerbach²⁷ recommends assessing tolerability and rechecking the patient’s CBC 2 weeks after starting oral iron replacement, while also checking hemoglobin and the reticulocyte count to see if the patient is responding to treatment. An analysis of 5 studies found that a hemoglobin measurement on Day 14 that shows an increase ≥1.0 g/dL from baseline predicts longer-term and sustained treatment response to continued oral therapy.³⁵ There is no clear consensus for target ferritin levels, but we suggest aiming for a ferritin level >100 ug/L based on recommendations for the treatment of restless legs syndrome.³⁶ We recommend ongoing monitoring every 4 to 6 weeks.

Bottom Line

Iron deficiency is common and can cause or contribute to psychiatric symptoms and disorders. Consider screening patients for iron deficiency and treating it with oral supplementation in individuals without any comorbidities, or referring them to their primary care physician or specialist.

Related Resources

• Berthou C, Iliou JP, Barba D. Iron, neuro-bioavailability and depression. EJHaem. 2021;3(1):263-275.

Nutritional deficiencies are one of the many causes of or contributors to symptoms in patients with psychiatric disorders. In this article, we discuss the prevalence of iron deficiency and its link to poor mental health, and how proper treatment may improve psychiatric symptoms. We also offer suggestions for how and when to test for and treat iron deficiency in psychiatric patients.

A common condition

Iron deficiency is the most common mineral deficiency in the world. According to the World Health Organization (WHO), approximately 25% of the global population is anemic and nearly one-half of those cases are the result of iron deficiency.¹ While the WHO has published guidelines defining iron deficiency as it relates to ferritin levels (<15 ug/L in adults and <12 ug/L in children), this estimate might be low.^2,3 Mei et al² found that hemoglobin and soluble transferrin receptors can be used to determine iron-deficient erythropoiesis, which indicates a physiological definition of iron deficiency. According to a study of children and nonpregnant women by Mei et al,² children with ferritin levels <20 ug/L and women with ferritin levels <25 ug/L should be considered iron-deficient. If replicated, this study suggests the prevalence of iron deficiency is higher than currently estimated.² Overall, an estimated 1.2 billion people worldwide have iron-deficiency anemia.⁴ Additionally, patients can be iron deficient without being anemic, a condition thought to be at least twice as common.⁴

Essential for brain function

Research shows the importance of iron to proper brain function.⁵ Iron deficiency in pregnant women is associated with significant neuropsychological impairments in neonates. Rodent studies have demonstrated the importance of iron and the effects of iron deficiency on the hippocampus, corpus striatum, and production of monoamines.⁵ Specifically, iron is a necessary cofactor in the enzymes tryptophan hydroxylase and tyrosine hydroxylase, which produce serotonin, dopamine, and norepinephrine. In rodent studies, monoamine deficits secondary to iron deficiency persist into adulthood even with iron supplementation, which highlights the importance of preventing iron deficiency during pregnancy and early life.⁵ While most research has focused on the impact of iron deficiency in infancy and early childhood, iron deficiency has an ongoing impact into adulthood, even if treated.⁶

Iron deficiency and psychiatric symptoms

Current research suggests an association between iron deficiency or low ferritin levels and psychiatric disorders, specifically depression, anxiety, and schizophrenia. In a web survey of 11,876 adults, Hidese et al⁷ found an association between a self-reported history of iron deficiency anemia and a self-reported history of depression. Another study of 528 municipal employees found an association between low serum ferritin concentrations and a high prevalence of depressive symptoms among men; no statistically significant association was detected in women.⁸ In an analysis of the Taiwan National Health Insurance Database from 2000 to 2012, Lee et al⁹ found a statistically significant increased risk of anxiety disorders, depression, sleep disorders, and psychotic disorders in patients with iron deficiency anemia after controlling for multiple confounders. Xu et al¹⁰ used quantitative susceptibility mapping to assess the iron status in certain regions of the brain of 30 patients with first-episode psychosis. They found lower levels of iron in the bilateral substantia nigra, left red nucleus, and left thalamus compared to healthy controls.¹⁰ Kim et al¹¹ found an association between iron deficiency and more severe negative symptoms in 121 patients with first-episode psychosis, which supports the hypothesis that iron deficiency may alter dopamine transmission in the brain.

Iron deficiency has been associated with psychopathology across the lifespan. In a population-based study in Taiwan, Chen et al¹² found an association between iron deficiency anemia and psychiatric disorders in children and adolescents, including mood disorders, autism spectrum disorder, attention-deficit/hyperactivity disorder, and developmental disorders. At the other end of the age spectrum, in a survey of 1,875 older adults in England, Stewart et al¹³ found an association between low ferritin levels (<45 ng/mL) and depressive symptoms after adjusting for demographic factors and overall health status.

In addition to specific psychiatric disorders and symptoms, iron deficiency is often associated with nonspecific symptoms such as fatigue.¹⁴ Fatigue is a symptom of numerous psychiatric disorders and is included in the DSM diagnostic criteria for major depressive disorder and generalized anxiety disorder.¹⁵

Iron supplementation might improve psychiatric symptoms

Some evidence suggests that using iron supplementation to treat iron deficiency can improve psychiatric symptoms. In a 2013 systematic literature review of 10 studies, Greig et al¹⁶ found a link between low iron status and poor cognition, poor mental health scores, and fatigue among women of childbearing age. In this review, 7 studies demonstrated improvement in cognition and 3 demonstrated improvement in mental health with iron supplementation.¹⁶ In a 2021 prospective study, 19 children and adolescents age 6 to 15 who had serum ferritin levels <30 ng/mL were treated with oral iron supplementation for 12 weeks.¹⁷ Participants showed significant improvements in sleep quality, depressive symptoms, and general mood as assessed via the Pittsburgh Sleep Quality Index, Center for Epidemiologic Studies Depression Scale, and Profile of Mood States (POMS) questionnaires, respectively.¹⁷ A randomized controlled trial of 219 female soldiers who were given iron supplementation or placebo for 8 weeks during basic combat training found that compared to placebo, iron supplementation led to improvements in mood as measured by the POMS questionnaire.¹⁸ Lastly, in a 2016 observational study of 412 adult psychiatric patients, Kassir¹⁹ found most patients (81%) had iron deficiency, defined as a transferrin saturation coefficient <30% or serum ferritin <100 ng/mL. Although these cutoffs are not considered standard and thus may have overrepresented the percentage of patients considered iron-deficient, more than one-half of patients considered iron-deficient in this study experienced a reduction or elimination of psychiatric symptoms following treatment with iron supplementation and/or psychotropic medications.¹⁹

Continue to: Individuals with iron deficiency...

Individuals with iron deficiency without anemia also may see improvement in psychiatric symptoms with iron treatment. In a 2018 systematic review, Houston et al²⁰ evaluated iron supplementation in 1,170 adults who were iron-deficient but not anemic. They found that in these patients, fatigue significantly improved but physical capacity did not.²⁰ Additionally, 2 other studies found iron treatment improved fatigue in nonanemic women.^21,22 In a 2016 systematic review, Pratt et al²³ concluded, “There is emerging evidence that … nonanemic iron deficiency … is a disease in its own right, deserving of further research in the development of strategies for detection and treatment.” Al-Naseem et al²⁴ suggested severity distinguishes iron deficiency with and without anemia.

Your role in assessing and treating iron deficiency

Testing for and treating iron deficiency generally is not a part of routine psychiatric practice. This might be due to apathy given the pervasiveness of iron deficiency, a belief that iron deficiency should be managed by primary care physicians, or a lack of familiarity with how to treat it and the benefits of such treatment for psychiatric patients. However, assessing for and treating iron deficiency in psychiatric patients is important, especially for individuals who are highly susceptible to inadequate iron levels. People at risk for iron deficiency include pregnant women, infants, young children, women with heavy menstrual bleeding, frequent blood donors, patients with cancer, individuals who have gastrointestinal (GI) surgeries or disorders, and those with heart failure.²⁵

Assessment. Iron status can be assessed through an iron studies panel. Because a patient can have iron deficiency without anemia, a complete blood count (CBC) alone does not suffice.²⁶ The iron panel includes serum iron, serum ferritin, serum transferrin or total iron-binding capacity (TIBC), and calculated transferrin saturation (TSAT), which is the ratio of serum iron to TIBC.

Iron deficiency is diagnosed if ferritin is <30 ng/mL, regardless of the hemoglobin concentration or underlying condition, and confirmed by a low TSAT.²⁶ In most guidelines, the cutoff value for TSAT for iron deficiency is <20%. Because the TSAT can be influenced by iron supplements or iron-rich foods, wait several hours to obtain blood after a patient takes an oral iron supplement or eats iron-rich foods. If desired, clinicians can use either ferritin or TSAT alone to diagnose iron deficiency. However, because ferritin can be falsely normal in inflammatory conditions such as obesity and infection, a TSAT may be needed to confirm iron deficiency if there is a high clinical suspicion despite a normal ferritin level.²⁶

Treatment. If iron deficiency is confirmed, instruct your patient to follow up with their primary care physician or the appropriate specialist to evaluate for any underlying etiologies.

Continue to: Iron deficiency should be treated...

Iron deficiency should be treated with supplementation because diet alone is insufficient for replenishing iron stores. Iron replacement can be oral or IV. Oral replacement is effective, safe, inexpensive, easy to obtain, and easy to administer.²⁷ Oral replacement is recommended for adults whose anemia is not severe or who do not have a comorbid condition such as pregnancy, inflammatory bowel conditions, gastric surgery, or chronic kidney disease. When anemia is severe or a patient has one of these comorbid conditions, IV is the preferred method of replacement.²⁷ In these cases, defer treatment to the patient’s primary care physician or specialist. 

There are no clear recommendations on the amount of iron per dose to prescribe.²⁷ The maximum amount of oral iron that can be absorbed is approximately 25 mg/d of elemental iron. A 325 mg ferrous sulfate tablet contains 65 mg of elemental iron, of which approximately 25 mg is absorbed and utilized.²⁷

Emerging evidence suggests that excessive iron dosing may reduce iron absorption and increase adverse effects. In a study of 54 nonanemic young women with iron deficiency who were given iron supplementation, Moretti et al²⁸ found that a large oral dose of iron taken in the morning increased hepcidin, which decreased the absorption of iron taken later for up to 48 hours. They found that 40 to 80 mg of elemental iron given on alternate days may maximize the fractional iron absorbed, increase dosage efficacy, reduce GI exposure to unabsorbed iron, and improve patients’ ability to tolerate iron supplementation.²⁸

Adverse effects from iron supplements occur in up to 70% of patients.²⁷ These can include metallic taste, nausea, vomiting, flatulence, diarrhea, epigastric pain, constipation, and dark stools.²⁷ Using a liquid form may help reduce adverse effects because it can be more easily titrated.²⁷ Tell patients to avoid enteric-coated or sustained-release iron capsules because these are poorly absorbed. Be cautious when prescribing iron supplementation to older adults because these patients tend to have more adverse effects, especially constipation, as well as reduced absorption, and may ultimately need IV treatment. Iron should not be taken with food, calcium supplements, antacids, coffee, tea, or milk.²⁷

The amount of iron present, cost, and adverse effects vary by supplement. The Table^27,29-33 provides more information on available forms of iron. Many forms of iron supplementation are available over-the-counter, and most are equally effective.²⁷ Advise patients to use iron products that have been tested by an independent company, such as ConsumerLab.com. Such companies evaluate products to see if they contain the amount of iron listed on the product’s label; for contamination with lead, cadmium, or arsenic; and for the product’s ability to break apart for absorption.³⁴

Six to 8 weeks of treatment with oral iron supplementation may be necessary before anemia is fully resolved, and it may take up to 6 months for iron stores to be repleted.²⁷ If a patient cannot tolerate an iron supplement, reducing the dose or taking it with meals may help prevent adverse effects, but also will reduce absorption. Auerbach²⁷ recommends assessing tolerability and rechecking the patient’s CBC 2 weeks after starting oral iron replacement, while also checking hemoglobin and the reticulocyte count to see if the patient is responding to treatment. An analysis of 5 studies found that a hemoglobin measurement on Day 14 that shows an increase ≥1.0 g/dL from baseline predicts longer-term and sustained treatment response to continued oral therapy.³⁵ There is no clear consensus for target ferritin levels, but we suggest aiming for a ferritin level >100 ug/L based on recommendations for the treatment of restless legs syndrome.³⁶ We recommend ongoing monitoring every 4 to 6 weeks.

Bottom Line

Iron deficiency is common and can cause or contribute to psychiatric symptoms and disorders. Consider screening patients for iron deficiency and treating it with oral supplementation in individuals without any comorbidities, or referring them to their primary care physician or specialist.

Related Resources

• Berthou C, Iliou JP, Barba D. Iron, neuro-bioavailability and depression. EJHaem. 2021;3(1):263-275.

Nutritional deficiencies are one of the many causes of or contributors to symptoms in patients with psychiatric disorders. In this article, we discuss the prevalence of iron deficiency and its link to poor mental health, and how proper treatment may improve psychiatric symptoms. We also offer suggestions for how and when to test for and treat iron deficiency in psychiatric patients.

A common condition

Iron deficiency is the most common mineral deficiency in the world. According to the World Health Organization (WHO), approximately 25% of the global population is anemic and nearly one-half of those cases are the result of iron deficiency.¹ While the WHO has published guidelines defining iron deficiency as it relates to ferritin levels (<15 ug/L in adults and <12 ug/L in children), this estimate might be low.^2,3 Mei et al² found that hemoglobin and soluble transferrin receptors can be used to determine iron-deficient erythropoiesis, which indicates a physiological definition of iron deficiency. According to a study of children and nonpregnant women by Mei et al,² children with ferritin levels <20 ug/L and women with ferritin levels <25 ug/L should be considered iron-deficient. If replicated, this study suggests the prevalence of iron deficiency is higher than currently estimated.² Overall, an estimated 1.2 billion people worldwide have iron-deficiency anemia.⁴ Additionally, patients can be iron deficient without being anemic, a condition thought to be at least twice as common.⁴

Essential for brain function

Research shows the importance of iron to proper brain function.⁵ Iron deficiency in pregnant women is associated with significant neuropsychological impairments in neonates. Rodent studies have demonstrated the importance of iron and the effects of iron deficiency on the hippocampus, corpus striatum, and production of monoamines.⁵ Specifically, iron is a necessary cofactor in the enzymes tryptophan hydroxylase and tyrosine hydroxylase, which produce serotonin, dopamine, and norepinephrine. In rodent studies, monoamine deficits secondary to iron deficiency persist into adulthood even with iron supplementation, which highlights the importance of preventing iron deficiency during pregnancy and early life.⁵ While most research has focused on the impact of iron deficiency in infancy and early childhood, iron deficiency has an ongoing impact into adulthood, even if treated.⁶

Iron deficiency and psychiatric symptoms

Current research suggests an association between iron deficiency or low ferritin levels and psychiatric disorders, specifically depression, anxiety, and schizophrenia. In a web survey of 11,876 adults, Hidese et al⁷ found an association between a self-reported history of iron deficiency anemia and a self-reported history of depression. Another study of 528 municipal employees found an association between low serum ferritin concentrations and a high prevalence of depressive symptoms among men; no statistically significant association was detected in women.⁸ In an analysis of the Taiwan National Health Insurance Database from 2000 to 2012, Lee et al⁹ found a statistically significant increased risk of anxiety disorders, depression, sleep disorders, and psychotic disorders in patients with iron deficiency anemia after controlling for multiple confounders. Xu et al¹⁰ used quantitative susceptibility mapping to assess the iron status in certain regions of the brain of 30 patients with first-episode psychosis. They found lower levels of iron in the bilateral substantia nigra, left red nucleus, and left thalamus compared to healthy controls.¹⁰ Kim et al¹¹ found an association between iron deficiency and more severe negative symptoms in 121 patients with first-episode psychosis, which supports the hypothesis that iron deficiency may alter dopamine transmission in the brain.

Iron deficiency has been associated with psychopathology across the lifespan. In a population-based study in Taiwan, Chen et al¹² found an association between iron deficiency anemia and psychiatric disorders in children and adolescents, including mood disorders, autism spectrum disorder, attention-deficit/hyperactivity disorder, and developmental disorders. At the other end of the age spectrum, in a survey of 1,875 older adults in England, Stewart et al¹³ found an association between low ferritin levels (<45 ng/mL) and depressive symptoms after adjusting for demographic factors and overall health status.

In addition to specific psychiatric disorders and symptoms, iron deficiency is often associated with nonspecific symptoms such as fatigue.¹⁴ Fatigue is a symptom of numerous psychiatric disorders and is included in the DSM diagnostic criteria for major depressive disorder and generalized anxiety disorder.¹⁵

Iron supplementation might improve psychiatric symptoms

Some evidence suggests that using iron supplementation to treat iron deficiency can improve psychiatric symptoms. In a 2013 systematic literature review of 10 studies, Greig et al¹⁶ found a link between low iron status and poor cognition, poor mental health scores, and fatigue among women of childbearing age. In this review, 7 studies demonstrated improvement in cognition and 3 demonstrated improvement in mental health with iron supplementation.¹⁶ In a 2021 prospective study, 19 children and adolescents age 6 to 15 who had serum ferritin levels <30 ng/mL were treated with oral iron supplementation for 12 weeks.¹⁷ Participants showed significant improvements in sleep quality, depressive symptoms, and general mood as assessed via the Pittsburgh Sleep Quality Index, Center for Epidemiologic Studies Depression Scale, and Profile of Mood States (POMS) questionnaires, respectively.¹⁷ A randomized controlled trial of 219 female soldiers who were given iron supplementation or placebo for 8 weeks during basic combat training found that compared to placebo, iron supplementation led to improvements in mood as measured by the POMS questionnaire.¹⁸ Lastly, in a 2016 observational study of 412 adult psychiatric patients, Kassir¹⁹ found most patients (81%) had iron deficiency, defined as a transferrin saturation coefficient <30% or serum ferritin <100 ng/mL. Although these cutoffs are not considered standard and thus may have overrepresented the percentage of patients considered iron-deficient, more than one-half of patients considered iron-deficient in this study experienced a reduction or elimination of psychiatric symptoms following treatment with iron supplementation and/or psychotropic medications.¹⁹

Continue to: Individuals with iron deficiency...

Individuals with iron deficiency without anemia also may see improvement in psychiatric symptoms with iron treatment. In a 2018 systematic review, Houston et al²⁰ evaluated iron supplementation in 1,170 adults who were iron-deficient but not anemic. They found that in these patients, fatigue significantly improved but physical capacity did not.²⁰ Additionally, 2 other studies found iron treatment improved fatigue in nonanemic women.^21,22 In a 2016 systematic review, Pratt et al²³ concluded, “There is emerging evidence that … nonanemic iron deficiency … is a disease in its own right, deserving of further research in the development of strategies for detection and treatment.” Al-Naseem et al²⁴ suggested severity distinguishes iron deficiency with and without anemia.

Your role in assessing and treating iron deficiency

Testing for and treating iron deficiency generally is not a part of routine psychiatric practice. This might be due to apathy given the pervasiveness of iron deficiency, a belief that iron deficiency should be managed by primary care physicians, or a lack of familiarity with how to treat it and the benefits of such treatment for psychiatric patients. However, assessing for and treating iron deficiency in psychiatric patients is important, especially for individuals who are highly susceptible to inadequate iron levels. People at risk for iron deficiency include pregnant women, infants, young children, women with heavy menstrual bleeding, frequent blood donors, patients with cancer, individuals who have gastrointestinal (GI) surgeries or disorders, and those with heart failure.²⁵

Assessment. Iron status can be assessed through an iron studies panel. Because a patient can have iron deficiency without anemia, a complete blood count (CBC) alone does not suffice.²⁶ The iron panel includes serum iron, serum ferritin, serum transferrin or total iron-binding capacity (TIBC), and calculated transferrin saturation (TSAT), which is the ratio of serum iron to TIBC.

Iron deficiency is diagnosed if ferritin is <30 ng/mL, regardless of the hemoglobin concentration or underlying condition, and confirmed by a low TSAT.²⁶ In most guidelines, the cutoff value for TSAT for iron deficiency is <20%. Because the TSAT can be influenced by iron supplements or iron-rich foods, wait several hours to obtain blood after a patient takes an oral iron supplement or eats iron-rich foods. If desired, clinicians can use either ferritin or TSAT alone to diagnose iron deficiency. However, because ferritin can be falsely normal in inflammatory conditions such as obesity and infection, a TSAT may be needed to confirm iron deficiency if there is a high clinical suspicion despite a normal ferritin level.²⁶

Treatment. If iron deficiency is confirmed, instruct your patient to follow up with their primary care physician or the appropriate specialist to evaluate for any underlying etiologies.

Continue to: Iron deficiency should be treated...

Iron deficiency should be treated with supplementation because diet alone is insufficient for replenishing iron stores. Iron replacement can be oral or IV. Oral replacement is effective, safe, inexpensive, easy to obtain, and easy to administer.²⁷ Oral replacement is recommended for adults whose anemia is not severe or who do not have a comorbid condition such as pregnancy, inflammatory bowel conditions, gastric surgery, or chronic kidney disease. When anemia is severe or a patient has one of these comorbid conditions, IV is the preferred method of replacement.²⁷ In these cases, defer treatment to the patient’s primary care physician or specialist. 

There are no clear recommendations on the amount of iron per dose to prescribe.²⁷ The maximum amount of oral iron that can be absorbed is approximately 25 mg/d of elemental iron. A 325 mg ferrous sulfate tablet contains 65 mg of elemental iron, of which approximately 25 mg is absorbed and utilized.²⁷

Emerging evidence suggests that excessive iron dosing may reduce iron absorption and increase adverse effects. In a study of 54 nonanemic young women with iron deficiency who were given iron supplementation, Moretti et al²⁸ found that a large oral dose of iron taken in the morning increased hepcidin, which decreased the absorption of iron taken later for up to 48 hours. They found that 40 to 80 mg of elemental iron given on alternate days may maximize the fractional iron absorbed, increase dosage efficacy, reduce GI exposure to unabsorbed iron, and improve patients’ ability to tolerate iron supplementation.²⁸

Adverse effects from iron supplements occur in up to 70% of patients.²⁷ These can include metallic taste, nausea, vomiting, flatulence, diarrhea, epigastric pain, constipation, and dark stools.²⁷ Using a liquid form may help reduce adverse effects because it can be more easily titrated.²⁷ Tell patients to avoid enteric-coated or sustained-release iron capsules because these are poorly absorbed. Be cautious when prescribing iron supplementation to older adults because these patients tend to have more adverse effects, especially constipation, as well as reduced absorption, and may ultimately need IV treatment. Iron should not be taken with food, calcium supplements, antacids, coffee, tea, or milk.²⁷

The amount of iron present, cost, and adverse effects vary by supplement. The Table^27,29-33 provides more information on available forms of iron. Many forms of iron supplementation are available over-the-counter, and most are equally effective.²⁷ Advise patients to use iron products that have been tested by an independent company, such as ConsumerLab.com. Such companies evaluate products to see if they contain the amount of iron listed on the product’s label; for contamination with lead, cadmium, or arsenic; and for the product’s ability to break apart for absorption.³⁴

Six to 8 weeks of treatment with oral iron supplementation may be necessary before anemia is fully resolved, and it may take up to 6 months for iron stores to be repleted.²⁷ If a patient cannot tolerate an iron supplement, reducing the dose or taking it with meals may help prevent adverse effects, but also will reduce absorption. Auerbach²⁷ recommends assessing tolerability and rechecking the patient’s CBC 2 weeks after starting oral iron replacement, while also checking hemoglobin and the reticulocyte count to see if the patient is responding to treatment. An analysis of 5 studies found that a hemoglobin measurement on Day 14 that shows an increase ≥1.0 g/dL from baseline predicts longer-term and sustained treatment response to continued oral therapy.³⁵ There is no clear consensus for target ferritin levels, but we suggest aiming for a ferritin level >100 ug/L based on recommendations for the treatment of restless legs syndrome.³⁶ We recommend ongoing monitoring every 4 to 6 weeks.

Bottom Line

Iron deficiency is common and can cause or contribute to psychiatric symptoms and disorders. Consider screening patients for iron deficiency and treating it with oral supplementation in individuals without any comorbidities, or referring them to their primary care physician or specialist.

Related Resources

• Berthou C, Iliou JP, Barba D. Iron, neuro-bioavailability and depression. EJHaem. 2021;3(1):263-275.

Psychogenic nonepileptic seizures (PNES) are a physical manifestation of a psychological disturbance. They are characterized by episodes of altered subjective experience and movements that can resemble epilepsy, syncope, or other paroxysmal disorders, but are not caused by neuronal hypersynchronization or other epileptic semiology.¹ Asynchronous movements, closed eyes, crying, stuttering, side-to-side head movement, and pelvic thrusting may be observed, all of which are atypical of epileptic seizures.¹ PNES, a syndrome of “pseudo-seizures,” is recognized in 11% of convulsive seizure cases presenting to the emergency department (ED).² PNES can co-occur with epilepsy; in 2 population-based studies, the pooled rate of EEG-confirmed comorbid epilepsy in PNES was 14%.³

Patients with PNES may present to multiple clinicians and hospitals for assessment. Access to outside hospital records can be limited, which can lead to redundant testing and increased health care costs and burden. Additionally, repeat presentations can increase stigmatization of the patient and delay or prevent appropriate therapeutic management, which might exacerbate a patient’s underlying psychiatric condition and could be dangerous in a patient with a co-occurring true seizure disorder. Though obtaining and reviewing external medical records can be cumbersome, doing so may prevent unnecessary testing, guide medical treatment, and strengthen the patient-doctor therapeutic alliance.

In this article, I discuss our treatment team’s management of a patient with PNES who, based on our careful review of records from previous hospitalizations, may have had a co-occurring true seizure disorder.

Case report

Ms. M, age 31, has a medical history of anxiety, depression, first-degree atrioventricular block, type 2 diabetes, and PNES. She presented to the ED with witnessed seizure activity at home.

According to collateral information, earlier that day Ms. M said she felt like she was seizing and began mumbling, but returned to baseline within a few minutes. Later, she demonstrated intermittent upper and lower extremity shaking for more than 1 hour. At one point, Ms. M appeared to be not breathing. However, upon initiation of chest compressions, she began gasping for air and immediately returned to baseline.

In the ED, Ms. M demonstrated multiple seizure-like episodes every 5 minutes, each lasting 5 to 10 seconds. These episodes were described as thrashing of the bilateral limbs and head crossing midline with eyes closed. No urinary incontinence or tongue biting was observed. Following each episode, Ms. M was unresponsive to verbal or tactile stimuli but intermittently opened her eyes. Laboratory test results were notable for an elevated serum lactate and positive for cannabinoids on urine drug screen.

Ms. M expressed frustration when told that her seizures were psychogenic. She was adamant that she had a true seizure disorder, demanded testing, and threatened to leave against medical advice without it. She said her brother had epilepsy, and thus she knew how seizures present. The interview was complicated by Ms. M’s mistrust and Cluster B personality disorder traits, such as splitting staff into “good and bad.” Ultimately, she was able to be reassured and did not leave the hospital.

Continue to: The treatment team...

The treatment team reviewed external records from 2 hospitals, Hospital A and Hospital B. These records showed well-documented inpatient and outpatient Psychiatry and Neurology diagnoses of PNES and other conversion disorders. Her medications included 2 anticonvulsants—topiramate 200 mg every 12 hours and oxcarbazepine 300 mg every 12 hours—as well as clonazepam 0.5 mg as needed for seizures and anxiety.

Ms. M’s first lifetime documented seizure occurred in May 2020, when she woke up with tongue biting, extremity shaking (laterality was unclear), and urinary incontinence followed by fatigue. She did not go to the hospital after this first episode. In June 2020, she presented and was admitted to Hospital A after similar seizure-like activity. While admitted and monitored on continuous EEG (cEEG), she had numerous events consistent with a nonepileptic etiology without a postictal state. A brain MRI was unremarkable, and Ms. M was diagnosed with PNES.

She presented to Hospital B in October 2020 reporting seizure-like activity. Hospital B reviewed Hospital A’s brain MRI and found right temporal lobe cortical dysplasia that was not noted in Hospital A’s MRI read. Ms. M again underwent cEEG while at Hospital B and had 2 recorded nonepileptic events. Interestingly, the cEEG demonstrated right temporal spikes that were consistent with the dysplasia location on the MRI. Ms. M was discharged and instructed to keep a seizure journal until outpatient follow-up.

Ms. M documented 3 seizure-like events between October and December 2020. She documented activity with and without full-body convulsions, some with laterality, some with loss of consciousness, and some preceded by an aura of impending doom. Ms. M was referred to psychotherapy and instructed to continue topiramate 100 mg every 12 hours for seizure prophylaxis.

Ms. M presented to Hospital B again in March 2022 reporting seizure-like activity. A brain MRI found cortical dysplasia in the right temporal lobe, consistent with the MRI at Hospital A in June 2020. cEEG was also repeated at Hospital B and was unremarkable. Oxcarbazepine 300 mg every 12 hours was added to Ms. M’s medications.

Ultimately, based on an external record review, our team (at Hospital C) concluded Ms. M had a possible true seizure co-occurrence with PNES. To avoid redundant testing, we did not repeat imaging or cEEG. Instead, we increased the patient’s oxcarbazepine to 450 mg every 12 hours, for both its effectiveness in temporal seizures and its mood-stabilizing properties. Moreover, in collecting our own data to draw a conclusion by a thorough record review, we gained Ms. M’s trust and strengthened the therapeutic alliance. She was agreeable to forgo more testing and continue outpatient follow-up with our hospital’s Neurology team.

Take-home points

Although PNES and true seizure disorder may not frequently co-occur, this case highlights the importance of clinician due diligence when evaluating a potential psychogenic illness, both for patient safety and clinician liability. By trusting our patients and drawing our own data-based conclusions, we can cultivate a safer and more satisfactory patient-clinician experience in the context of psychosomatic disorders.

Psychogenic nonepileptic seizures (PNES) are a physical manifestation of a psychological disturbance. They are characterized by episodes of altered subjective experience and movements that can resemble epilepsy, syncope, or other paroxysmal disorders, but are not caused by neuronal hypersynchronization or other epileptic semiology.¹ Asynchronous movements, closed eyes, crying, stuttering, side-to-side head movement, and pelvic thrusting may be observed, all of which are atypical of epileptic seizures.¹ PNES, a syndrome of “pseudo-seizures,” is recognized in 11% of convulsive seizure cases presenting to the emergency department (ED).² PNES can co-occur with epilepsy; in 2 population-based studies, the pooled rate of EEG-confirmed comorbid epilepsy in PNES was 14%.³

Patients with PNES may present to multiple clinicians and hospitals for assessment. Access to outside hospital records can be limited, which can lead to redundant testing and increased health care costs and burden. Additionally, repeat presentations can increase stigmatization of the patient and delay or prevent appropriate therapeutic management, which might exacerbate a patient’s underlying psychiatric condition and could be dangerous in a patient with a co-occurring true seizure disorder. Though obtaining and reviewing external medical records can be cumbersome, doing so may prevent unnecessary testing, guide medical treatment, and strengthen the patient-doctor therapeutic alliance.

In this article, I discuss our treatment team’s management of a patient with PNES who, based on our careful review of records from previous hospitalizations, may have had a co-occurring true seizure disorder.

Case report

Ms. M, age 31, has a medical history of anxiety, depression, first-degree atrioventricular block, type 2 diabetes, and PNES. She presented to the ED with witnessed seizure activity at home.

According to collateral information, earlier that day Ms. M said she felt like she was seizing and began mumbling, but returned to baseline within a few minutes. Later, she demonstrated intermittent upper and lower extremity shaking for more than 1 hour. At one point, Ms. M appeared to be not breathing. However, upon initiation of chest compressions, she began gasping for air and immediately returned to baseline.

In the ED, Ms. M demonstrated multiple seizure-like episodes every 5 minutes, each lasting 5 to 10 seconds. These episodes were described as thrashing of the bilateral limbs and head crossing midline with eyes closed. No urinary incontinence or tongue biting was observed. Following each episode, Ms. M was unresponsive to verbal or tactile stimuli but intermittently opened her eyes. Laboratory test results were notable for an elevated serum lactate and positive for cannabinoids on urine drug screen.

Ms. M expressed frustration when told that her seizures were psychogenic. She was adamant that she had a true seizure disorder, demanded testing, and threatened to leave against medical advice without it. She said her brother had epilepsy, and thus she knew how seizures present. The interview was complicated by Ms. M’s mistrust and Cluster B personality disorder traits, such as splitting staff into “good and bad.” Ultimately, she was able to be reassured and did not leave the hospital.

Continue to: The treatment team...

The treatment team reviewed external records from 2 hospitals, Hospital A and Hospital B. These records showed well-documented inpatient and outpatient Psychiatry and Neurology diagnoses of PNES and other conversion disorders. Her medications included 2 anticonvulsants—topiramate 200 mg every 12 hours and oxcarbazepine 300 mg every 12 hours—as well as clonazepam 0.5 mg as needed for seizures and anxiety.

Ms. M’s first lifetime documented seizure occurred in May 2020, when she woke up with tongue biting, extremity shaking (laterality was unclear), and urinary incontinence followed by fatigue. She did not go to the hospital after this first episode. In June 2020, she presented and was admitted to Hospital A after similar seizure-like activity. While admitted and monitored on continuous EEG (cEEG), she had numerous events consistent with a nonepileptic etiology without a postictal state. A brain MRI was unremarkable, and Ms. M was diagnosed with PNES.

She presented to Hospital B in October 2020 reporting seizure-like activity. Hospital B reviewed Hospital A’s brain MRI and found right temporal lobe cortical dysplasia that was not noted in Hospital A’s MRI read. Ms. M again underwent cEEG while at Hospital B and had 2 recorded nonepileptic events. Interestingly, the cEEG demonstrated right temporal spikes that were consistent with the dysplasia location on the MRI. Ms. M was discharged and instructed to keep a seizure journal until outpatient follow-up.

Ms. M documented 3 seizure-like events between October and December 2020. She documented activity with and without full-body convulsions, some with laterality, some with loss of consciousness, and some preceded by an aura of impending doom. Ms. M was referred to psychotherapy and instructed to continue topiramate 100 mg every 12 hours for seizure prophylaxis.

Ms. M presented to Hospital B again in March 2022 reporting seizure-like activity. A brain MRI found cortical dysplasia in the right temporal lobe, consistent with the MRI at Hospital A in June 2020. cEEG was also repeated at Hospital B and was unremarkable. Oxcarbazepine 300 mg every 12 hours was added to Ms. M’s medications.

Ultimately, based on an external record review, our team (at Hospital C) concluded Ms. M had a possible true seizure co-occurrence with PNES. To avoid redundant testing, we did not repeat imaging or cEEG. Instead, we increased the patient’s oxcarbazepine to 450 mg every 12 hours, for both its effectiveness in temporal seizures and its mood-stabilizing properties. Moreover, in collecting our own data to draw a conclusion by a thorough record review, we gained Ms. M’s trust and strengthened the therapeutic alliance. She was agreeable to forgo more testing and continue outpatient follow-up with our hospital’s Neurology team.

Take-home points

Although PNES and true seizure disorder may not frequently co-occur, this case highlights the importance of clinician due diligence when evaluating a potential psychogenic illness, both for patient safety and clinician liability. By trusting our patients and drawing our own data-based conclusions, we can cultivate a safer and more satisfactory patient-clinician experience in the context of psychosomatic disorders.

Psychogenic nonepileptic seizures (PNES) are a physical manifestation of a psychological disturbance. They are characterized by episodes of altered subjective experience and movements that can resemble epilepsy, syncope, or other paroxysmal disorders, but are not caused by neuronal hypersynchronization or other epileptic semiology.¹ Asynchronous movements, closed eyes, crying, stuttering, side-to-side head movement, and pelvic thrusting may be observed, all of which are atypical of epileptic seizures.¹ PNES, a syndrome of “pseudo-seizures,” is recognized in 11% of convulsive seizure cases presenting to the emergency department (ED).² PNES can co-occur with epilepsy; in 2 population-based studies, the pooled rate of EEG-confirmed comorbid epilepsy in PNES was 14%.³

Patients with PNES may present to multiple clinicians and hospitals for assessment. Access to outside hospital records can be limited, which can lead to redundant testing and increased health care costs and burden. Additionally, repeat presentations can increase stigmatization of the patient and delay or prevent appropriate therapeutic management, which might exacerbate a patient’s underlying psychiatric condition and could be dangerous in a patient with a co-occurring true seizure disorder. Though obtaining and reviewing external medical records can be cumbersome, doing so may prevent unnecessary testing, guide medical treatment, and strengthen the patient-doctor therapeutic alliance.

In this article, I discuss our treatment team’s management of a patient with PNES who, based on our careful review of records from previous hospitalizations, may have had a co-occurring true seizure disorder.

Case report

Ms. M, age 31, has a medical history of anxiety, depression, first-degree atrioventricular block, type 2 diabetes, and PNES. She presented to the ED with witnessed seizure activity at home.

According to collateral information, earlier that day Ms. M said she felt like she was seizing and began mumbling, but returned to baseline within a few minutes. Later, she demonstrated intermittent upper and lower extremity shaking for more than 1 hour. At one point, Ms. M appeared to be not breathing. However, upon initiation of chest compressions, she began gasping for air and immediately returned to baseline.

In the ED, Ms. M demonstrated multiple seizure-like episodes every 5 minutes, each lasting 5 to 10 seconds. These episodes were described as thrashing of the bilateral limbs and head crossing midline with eyes closed. No urinary incontinence or tongue biting was observed. Following each episode, Ms. M was unresponsive to verbal or tactile stimuli but intermittently opened her eyes. Laboratory test results were notable for an elevated serum lactate and positive for cannabinoids on urine drug screen.

Ms. M expressed frustration when told that her seizures were psychogenic. She was adamant that she had a true seizure disorder, demanded testing, and threatened to leave against medical advice without it. She said her brother had epilepsy, and thus she knew how seizures present. The interview was complicated by Ms. M’s mistrust and Cluster B personality disorder traits, such as splitting staff into “good and bad.” Ultimately, she was able to be reassured and did not leave the hospital.

Continue to: The treatment team...

The treatment team reviewed external records from 2 hospitals, Hospital A and Hospital B. These records showed well-documented inpatient and outpatient Psychiatry and Neurology diagnoses of PNES and other conversion disorders. Her medications included 2 anticonvulsants—topiramate 200 mg every 12 hours and oxcarbazepine 300 mg every 12 hours—as well as clonazepam 0.5 mg as needed for seizures and anxiety.

Ms. M’s first lifetime documented seizure occurred in May 2020, when she woke up with tongue biting, extremity shaking (laterality was unclear), and urinary incontinence followed by fatigue. She did not go to the hospital after this first episode. In June 2020, she presented and was admitted to Hospital A after similar seizure-like activity. While admitted and monitored on continuous EEG (cEEG), she had numerous events consistent with a nonepileptic etiology without a postictal state. A brain MRI was unremarkable, and Ms. M was diagnosed with PNES.

She presented to Hospital B in October 2020 reporting seizure-like activity. Hospital B reviewed Hospital A’s brain MRI and found right temporal lobe cortical dysplasia that was not noted in Hospital A’s MRI read. Ms. M again underwent cEEG while at Hospital B and had 2 recorded nonepileptic events. Interestingly, the cEEG demonstrated right temporal spikes that were consistent with the dysplasia location on the MRI. Ms. M was discharged and instructed to keep a seizure journal until outpatient follow-up.

Ms. M documented 3 seizure-like events between October and December 2020. She documented activity with and without full-body convulsions, some with laterality, some with loss of consciousness, and some preceded by an aura of impending doom. Ms. M was referred to psychotherapy and instructed to continue topiramate 100 mg every 12 hours for seizure prophylaxis.

Ms. M presented to Hospital B again in March 2022 reporting seizure-like activity. A brain MRI found cortical dysplasia in the right temporal lobe, consistent with the MRI at Hospital A in June 2020. cEEG was also repeated at Hospital B and was unremarkable. Oxcarbazepine 300 mg every 12 hours was added to Ms. M’s medications.

Ultimately, based on an external record review, our team (at Hospital C) concluded Ms. M had a possible true seizure co-occurrence with PNES. To avoid redundant testing, we did not repeat imaging or cEEG. Instead, we increased the patient’s oxcarbazepine to 450 mg every 12 hours, for both its effectiveness in temporal seizures and its mood-stabilizing properties. Moreover, in collecting our own data to draw a conclusion by a thorough record review, we gained Ms. M’s trust and strengthened the therapeutic alliance. She was agreeable to forgo more testing and continue outpatient follow-up with our hospital’s Neurology team.

Take-home points

Although PNES and true seizure disorder may not frequently co-occur, this case highlights the importance of clinician due diligence when evaluating a potential psychogenic illness, both for patient safety and clinician liability. By trusting our patients and drawing our own data-based conclusions, we can cultivate a safer and more satisfactory patient-clinician experience in the context of psychosomatic disorders.

Many psychiatric physicians lament the dearth of procedures in psychiatry compared to other medical specialties such as surgery, cardiology, gastroenterology, or radiology. The few procedures in psychiatry include electroconvulsive therapy (ECT), repetitive transcranial magnetic stimulation, and vagus nerve stimulation, which are restricted to a small number of sites and not available for most psychiatric practitioners. This lack of tangible/physical procedures should not be surprising because psychiatry deals with disorders of the mind, which are invisible.

However, when one closely examines what psychiatrists do in daily practice to heal our patients, most of what we do actually qualifies as “procedures” although no hardware, machines, or gadgets are involved. Treating psychiatric brain disorders (aka mental illness) requires exquisite skills and expertise, just like medical specialties that use machines to measure or treat various body organs.

It’s time to relabel psychiatric interventions as procedures designed to improve anomalous thoughts, affect, emotions, cognition, and behavior. After giving it some thought (and with a bit of tongue in cheek), I came up with the following list of “psychiatric procedures”:

• Psychosocial exploratory laparotomy: The comprehensive psychiatric assessment and mental status exam.
• Chemotherapy: Oral or injective pharmacotherapeutic intervention.
• Psychoplastic repair: Neuroplasticity, including neurogenesis, synaptogenesis, and dendritic spine regeneration, have been shown to be associated with both psychotherapy and psychotropic medications.^1,2
• Suicidectomy: Extracting the lethal urge to die by suicide.
• Anger debridement: Removing the irritability and destructive anger outbursts frequently associated with various psychopathologies.
• Anxiety ablation: Eliminating the noxious emotional state of anxiety and frightening panic attacks.
• Empathy infusion: Enabling patients to become more understanding of other people and bolstering their impaired “theory of mind.”
• Personality transplant: Replacing a maladaptive personality with a healthier one (eg, using dialectical behavior therapy for borderline personality disorder).
• Cognitive LASIK: To improve insight, analogous to how ophthalmologic LASIK improves sight.
• Mental embolectomy: Removing a blockage to repair rigid attitudes and develop “open-mindedness.”
• Behavioral dilation and curettage (D&C): To rid patients of negative attributes such as impulsivity or reckless behavior.
• Psychotherapeutic anesthesia: Numbing emotional pain or severe grief reaction.
• Social anastomosis: Helping patients who are schizoid or isolative via group therapy, an effective interpersonal and social procedure.
• Psychotherapeutic stent: To open the vessels of narrow-mindedness.
• Cortico-psychological resuscitation (CPR): For patients experiencing stress-induced behavioral arrhythmias or emotional infarction.
• Immunotherapy: Using various neuroprotective psychotropic medications with anti-inflammatory properties or employing evidence-based psychotherapy such as cognitive-behavior therapy (aka neuropsychotherapy), which have been shown to reduce inflammatory biomarkers such as C-reactive protein and cytokines.³
• Psychotherapy: A neuromodulation procedure for a variety of psychiatric disorders.⁴
• Neurobiological facelift: It is well established that neurogenesis, synaptogenesis, and dendritic spine sprouting are significantly increased with both neuroprotective psychotropic medications (antidepressants, lithium, valproate, and second-generationantipsychotics⁵) as well as with psych­otherapy. There is growing evidence of “premature brain aging” in schizophrenia, bipolar disorder, and depression, with shrinkage in the volume of the cortex and subcortical regions, especially the hippocampus. Psychiatric biopsychosocial interven­tion rebuilds those brain regions by stimulating and replenishing the neuropil and neuro­genic regions (dentate gyrus and subventricular zone). This is like performing virtual plastic surgery on a wrinkled brain and its sagging mind. MRI scans before and after ECT show a remarkable ≥10% increase in the volume of the hippocampus and amygdala, which translates to billions of new neurons, glia, and synapses.⁶

Reinventing psychiatric therapies as procedures may elicit sarcasm from skeptics, but when you think about it, it is justified. Excising depression is like excising a tumor, not with a scalpel, but virtually. Stabilizing the broken brain and mind after a psychotic episode (aka brain attack) is like stabilizing the heart after a myocardial infarction (aka heart attack). Just because the mind is virtual doesn’t mean it is not “real and tangible.” A desktop computer is visible, but the software that brings it to life is invisible. Healing the human mind requires multiple medical interventions by psychiatrists in hospitals and clinics, just like surgeons and endoscopists or cardiologists. Mental health care is as much procedural as other medical and surgical specialties.

One more thing: the validated clinical rating scales for various psychiatric brain disorders (eg, the Positive and Negative Syndrome Scale for schizophrenia, Montgomery-Åsberg Depression Rating Scale for depression, Young Mania Rating Scale for bipolar mania, Hamilton Anxiety Rating Scale for anxiety, Yale-Brown Obsessive Compulsive Scale for obsessive-compulsive disorder) are actual measurement procedures for the severity of the illness, just as a sphygmomanometer measures blood pressure and its improvement with treatment. There are also multiple cognitive test batteries to measure cognitive impairment.⁷

Finally, unlike psychiatric reimbursement, which is tethered to time, procedures are compensated more generously, irrespective of the time involved. The complexities of diagnosing and treating psychiatric brain disorders that dangerously disrupt thoughts, feelings, behavior, and cognition are just as intricate and demanding as the diagnosis and treatment of general medical and surgical conditions. They should all be equally appreciated as vital life-saving procedures for the human body, brain, and mind.

Many psychiatric physicians lament the dearth of procedures in psychiatry compared to other medical specialties such as surgery, cardiology, gastroenterology, or radiology. The few procedures in psychiatry include electroconvulsive therapy (ECT), repetitive transcranial magnetic stimulation, and vagus nerve stimulation, which are restricted to a small number of sites and not available for most psychiatric practitioners. This lack of tangible/physical procedures should not be surprising because psychiatry deals with disorders of the mind, which are invisible.

However, when one closely examines what psychiatrists do in daily practice to heal our patients, most of what we do actually qualifies as “procedures” although no hardware, machines, or gadgets are involved. Treating psychiatric brain disorders (aka mental illness) requires exquisite skills and expertise, just like medical specialties that use machines to measure or treat various body organs.

It’s time to relabel psychiatric interventions as procedures designed to improve anomalous thoughts, affect, emotions, cognition, and behavior. After giving it some thought (and with a bit of tongue in cheek), I came up with the following list of “psychiatric procedures”:

• Psychosocial exploratory laparotomy: The comprehensive psychiatric assessment and mental status exam.
• Chemotherapy: Oral or injective pharmacotherapeutic intervention.
• Psychoplastic repair: Neuroplasticity, including neurogenesis, synaptogenesis, and dendritic spine regeneration, have been shown to be associated with both psychotherapy and psychotropic medications.^1,2
• Suicidectomy: Extracting the lethal urge to die by suicide.
• Anger debridement: Removing the irritability and destructive anger outbursts frequently associated with various psychopathologies.
• Anxiety ablation: Eliminating the noxious emotional state of anxiety and frightening panic attacks.
• Empathy infusion: Enabling patients to become more understanding of other people and bolstering their impaired “theory of mind.”
• Personality transplant: Replacing a maladaptive personality with a healthier one (eg, using dialectical behavior therapy for borderline personality disorder).
• Cognitive LASIK: To improve insight, analogous to how ophthalmologic LASIK improves sight.
• Mental embolectomy: Removing a blockage to repair rigid attitudes and develop “open-mindedness.”
• Behavioral dilation and curettage (D&C): To rid patients of negative attributes such as impulsivity or reckless behavior.
• Psychotherapeutic anesthesia: Numbing emotional pain or severe grief reaction.
• Social anastomosis: Helping patients who are schizoid or isolative via group therapy, an effective interpersonal and social procedure.
• Psychotherapeutic stent: To open the vessels of narrow-mindedness.
• Cortico-psychological resuscitation (CPR): For patients experiencing stress-induced behavioral arrhythmias or emotional infarction.
• Immunotherapy: Using various neuroprotective psychotropic medications with anti-inflammatory properties or employing evidence-based psychotherapy such as cognitive-behavior therapy (aka neuropsychotherapy), which have been shown to reduce inflammatory biomarkers such as C-reactive protein and cytokines.³
• Psychotherapy: A neuromodulation procedure for a variety of psychiatric disorders.⁴
• Neurobiological facelift: It is well established that neurogenesis, synaptogenesis, and dendritic spine sprouting are significantly increased with both neuroprotective psychotropic medications (antidepressants, lithium, valproate, and second-generationantipsychotics⁵) as well as with psych­otherapy. There is growing evidence of “premature brain aging” in schizophrenia, bipolar disorder, and depression, with shrinkage in the volume of the cortex and subcortical regions, especially the hippocampus. Psychiatric biopsychosocial interven­tion rebuilds those brain regions by stimulating and replenishing the neuropil and neuro­genic regions (dentate gyrus and subventricular zone). This is like performing virtual plastic surgery on a wrinkled brain and its sagging mind. MRI scans before and after ECT show a remarkable ≥10% increase in the volume of the hippocampus and amygdala, which translates to billions of new neurons, glia, and synapses.⁶

Reinventing psychiatric therapies as procedures may elicit sarcasm from skeptics, but when you think about it, it is justified. Excising depression is like excising a tumor, not with a scalpel, but virtually. Stabilizing the broken brain and mind after a psychotic episode (aka brain attack) is like stabilizing the heart after a myocardial infarction (aka heart attack). Just because the mind is virtual doesn’t mean it is not “real and tangible.” A desktop computer is visible, but the software that brings it to life is invisible. Healing the human mind requires multiple medical interventions by psychiatrists in hospitals and clinics, just like surgeons and endoscopists or cardiologists. Mental health care is as much procedural as other medical and surgical specialties.

One more thing: the validated clinical rating scales for various psychiatric brain disorders (eg, the Positive and Negative Syndrome Scale for schizophrenia, Montgomery-Åsberg Depression Rating Scale for depression, Young Mania Rating Scale for bipolar mania, Hamilton Anxiety Rating Scale for anxiety, Yale-Brown Obsessive Compulsive Scale for obsessive-compulsive disorder) are actual measurement procedures for the severity of the illness, just as a sphygmomanometer measures blood pressure and its improvement with treatment. There are also multiple cognitive test batteries to measure cognitive impairment.⁷

Finally, unlike psychiatric reimbursement, which is tethered to time, procedures are compensated more generously, irrespective of the time involved. The complexities of diagnosing and treating psychiatric brain disorders that dangerously disrupt thoughts, feelings, behavior, and cognition are just as intricate and demanding as the diagnosis and treatment of general medical and surgical conditions. They should all be equally appreciated as vital life-saving procedures for the human body, brain, and mind.

Many psychiatric physicians lament the dearth of procedures in psychiatry compared to other medical specialties such as surgery, cardiology, gastroenterology, or radiology. The few procedures in psychiatry include electroconvulsive therapy (ECT), repetitive transcranial magnetic stimulation, and vagus nerve stimulation, which are restricted to a small number of sites and not available for most psychiatric practitioners. This lack of tangible/physical procedures should not be surprising because psychiatry deals with disorders of the mind, which are invisible.

However, when one closely examines what psychiatrists do in daily practice to heal our patients, most of what we do actually qualifies as “procedures” although no hardware, machines, or gadgets are involved. Treating psychiatric brain disorders (aka mental illness) requires exquisite skills and expertise, just like medical specialties that use machines to measure or treat various body organs.

It’s time to relabel psychiatric interventions as procedures designed to improve anomalous thoughts, affect, emotions, cognition, and behavior. After giving it some thought (and with a bit of tongue in cheek), I came up with the following list of “psychiatric procedures”:

• Psychosocial exploratory laparotomy: The comprehensive psychiatric assessment and mental status exam.
• Chemotherapy: Oral or injective pharmacotherapeutic intervention.
• Psychoplastic repair: Neuroplasticity, including neurogenesis, synaptogenesis, and dendritic spine regeneration, have been shown to be associated with both psychotherapy and psychotropic medications.^1,2
• Suicidectomy: Extracting the lethal urge to die by suicide.
• Anger debridement: Removing the irritability and destructive anger outbursts frequently associated with various psychopathologies.
• Anxiety ablation: Eliminating the noxious emotional state of anxiety and frightening panic attacks.
• Empathy infusion: Enabling patients to become more understanding of other people and bolstering their impaired “theory of mind.”
• Personality transplant: Replacing a maladaptive personality with a healthier one (eg, using dialectical behavior therapy for borderline personality disorder).
• Cognitive LASIK: To improve insight, analogous to how ophthalmologic LASIK improves sight.
• Mental embolectomy: Removing a blockage to repair rigid attitudes and develop “open-mindedness.”
• Behavioral dilation and curettage (D&C): To rid patients of negative attributes such as impulsivity or reckless behavior.
• Psychotherapeutic anesthesia: Numbing emotional pain or severe grief reaction.
• Social anastomosis: Helping patients who are schizoid or isolative via group therapy, an effective interpersonal and social procedure.
• Psychotherapeutic stent: To open the vessels of narrow-mindedness.
• Cortico-psychological resuscitation (CPR): For patients experiencing stress-induced behavioral arrhythmias or emotional infarction.
• Immunotherapy: Using various neuroprotective psychotropic medications with anti-inflammatory properties or employing evidence-based psychotherapy such as cognitive-behavior therapy (aka neuropsychotherapy), which have been shown to reduce inflammatory biomarkers such as C-reactive protein and cytokines.³
• Psychotherapy: A neuromodulation procedure for a variety of psychiatric disorders.⁴
• Neurobiological facelift: It is well established that neurogenesis, synaptogenesis, and dendritic spine sprouting are significantly increased with both neuroprotective psychotropic medications (antidepressants, lithium, valproate, and second-generationantipsychotics⁵) as well as with psych­otherapy. There is growing evidence of “premature brain aging” in schizophrenia, bipolar disorder, and depression, with shrinkage in the volume of the cortex and subcortical regions, especially the hippocampus. Psychiatric biopsychosocial interven­tion rebuilds those brain regions by stimulating and replenishing the neuropil and neuro­genic regions (dentate gyrus and subventricular zone). This is like performing virtual plastic surgery on a wrinkled brain and its sagging mind. MRI scans before and after ECT show a remarkable ≥10% increase in the volume of the hippocampus and amygdala, which translates to billions of new neurons, glia, and synapses.⁶

Reinventing psychiatric therapies as procedures may elicit sarcasm from skeptics, but when you think about it, it is justified. Excising depression is like excising a tumor, not with a scalpel, but virtually. Stabilizing the broken brain and mind after a psychotic episode (aka brain attack) is like stabilizing the heart after a myocardial infarction (aka heart attack). Just because the mind is virtual doesn’t mean it is not “real and tangible.” A desktop computer is visible, but the software that brings it to life is invisible. Healing the human mind requires multiple medical interventions by psychiatrists in hospitals and clinics, just like surgeons and endoscopists or cardiologists. Mental health care is as much procedural as other medical and surgical specialties.

One more thing: the validated clinical rating scales for various psychiatric brain disorders (eg, the Positive and Negative Syndrome Scale for schizophrenia, Montgomery-Åsberg Depression Rating Scale for depression, Young Mania Rating Scale for bipolar mania, Hamilton Anxiety Rating Scale for anxiety, Yale-Brown Obsessive Compulsive Scale for obsessive-compulsive disorder) are actual measurement procedures for the severity of the illness, just as a sphygmomanometer measures blood pressure and its improvement with treatment. There are also multiple cognitive test batteries to measure cognitive impairment.⁷

Finally, unlike psychiatric reimbursement, which is tethered to time, procedures are compensated more generously, irrespective of the time involved. The complexities of diagnosing and treating psychiatric brain disorders that dangerously disrupt thoughts, feelings, behavior, and cognition are just as intricate and demanding as the diagnosis and treatment of general medical and surgical conditions. They should all be equally appreciated as vital life-saving procedures for the human body, brain, and mind.