Bipolar Disorder

CASE Aggressive, impulsive, and not sleeping

Mr. S, age 22, is brought by his family to his outpatient psychiatrist because he has begun to exhibit motor and verbal tics, excessive adherence to rules and routines, and increased impulsivity and agitation.

Mr. S has significant language impairment and is unreliable as a narrator. His family reports that Mr. S’s behavior has resulted in declining academic performance, and they have curtailed his social activities due to behavioral issues. Both his family and teachers report that it is increasingly difficult to redirect Mr. S’s behavior. Although not physically aggressive, Mr. S becomes verbally agitated when rituals are incomplete. He has gone from sleeping 8 hours each night to only 3 to 4 hours, but he does not appear tired during the day.

HISTORY Multiple hospitalizations

As a child, Mr. S had been diagnosed with autism and intellectual disability. When he was 13, he began exhibiting marked stereotypy, restlessness, impulsivity, frenzy, agitation, combativeness, and purposeless motor activity. At that time, he was not receiving any medications. Mr. S had not slept for 2 days and had been walking in circles nonstop. He became aggressive whenever anyone attempted to redirect his behavior. The family took Mr. S to the emergency department (ED), where clinicians ruled out organic causes for his behavioral disturbances, including infections, drug intoxication, and use of illicit substances. Mr. S was transferred from the ED to a child and adolescent psychiatry ward at a nearby university hospital for inpatient treatment.

On the inpatient unit, the treatment team diagnosed Mr. S with bipolar disorder and believed that he was experiencing a manic episode. He was prescribed quetiapine, 25 mg by mouth during the day and 75 mg by mouth at night, to stabilize his agitation, and was discharged with a plan to follow up with his outpatient psychiatrist. However, within 1 week, his symptoms returned, with markedly increased aggression and agitation, so he was readmitted, tapered off quetiapine, and prescribed valproic acid, 125 mg by mouth during the day and 375 mg by mouth at bedtime. With this regimen, Mr. S became calmer, but when he was discharged home, he was subdued and withdrawn, overly adherent to rules and routines, constantly irritable, and often unable to focus.

Two years later, Mr. S developed hyperammonemia. Valproic acid was discontinued, and many of his behavioral issues resolved. He flourished both academically and socially. He experienced no exacerbation of symptoms until his current presentation.

[polldaddy:10544547]

EVALUATION Pinpointing the cause

Mr. S’s physical examination reveals that his vital signs are within normal limits. Mr. S is mildly tachycardic (heart rate, 105 bpm), with regular rate and rhythm. No murmurs, gallops, or rubs are auscultated. The remainder of the physical exam, including a detailed neurologic exam, is normal.

On mental status examination, Mr. S makes limited eye contact. He has difficulty sitting in the chair, with increased rocking, finger flicking, and hand flapping from baseline. Some compulsive behaviors are noted, such as tapping his neck. He has increased tics (eye blinking and mouth opening) and increased verbigeration and repetitive verbal statements. He loudly and repeatedly demands to go home, and uses short sentences with incorrect pronouns. His affect is difficult to assess, but he is agitated. His thought process is concrete. There is no evidence of suicidal ideation, homicidal ideation, or psychosis. Mr. S denies auditory hallucinations. His insight and judgment are limited.

Continue to: The psychiatrist rules out...

The psychiatrist rules out a behavioral exacerbation of autism based on an interview with Mr. S’s family and established rapport from treating him for several years. Mr. S’s family reports that many of his behaviors are not new but that the increased drive and intensity is worrisome. Further, his family cannot identify any stressors or precipitants for the behaviors and reports that offering preferred reinforcers did not help. An anxiety disorder is ruled out because according to the family, Mr. S’s drive to constantly move and complete rituals is fueling his anxiety. Schizoaffective disorder is ruled out because Mr. S denies auditory hallucinations and has not been observed responding to internal stimuli.

His Bush-Francis Catatonia Rating Scale (BFCRS) score is 26, which suggests a high likelihood of catatonia. Based on the BFCRS score, Mr. S’s psychiatrist makes the diagnosis of hyperkinetic catatonia.

The authors’ observations

The psychiatrist determined that Mr. S had been misdiagnosed with bipolar disorder at age 13. At that time, he had experienced his first episode of hyperkinetic catatonia and his symptoms decreased after he received lorazepam in the ED. However, the treatment team did not correctly identify this, most likely due to limited knowledge of catatonia among emergency medicine clinicians.

This case exemplifies a cognitive error of premature closure. Rather than considering catatonia as a complication of autism when Mr. S was 13, the clinicians added a second psychiatric diagnosis of bipolar disorder.Although premature closure errors generally occur when the physician assumes the patient is having a common complication of a known illness,¹ in Mr. S’s case, the opposite occurred.

Conceptualizing catatonia

One helpful model for conceptualizing catatonia is to think of it as a basal ganglia disorder, with lesions in the basal ganglia thalamocortical tracts and the anterior cingulate/medial orbitofrontal circuit. Disrupting these pathways can result in symptoms such as mutism or repetitive and imitative behaviors. This is likely due to decreased disinhibition by gamma-aminobutyric acid (GABA), resulting in a hypodopaminergic state. This explains why benzodiazepines, which act to increase GABA, are effective for treating catatonia, and antipsychotics that act to decrease dopamine can exacerbate symptoms. Fricchione et al² developed a model to visually represent the neurobiologic pathophysiology of catatonia (Figure²).

Continue to: Underlying causes of catatonia

Catatonia is most often seen in individuals with an underlying psychiatric condition such as schizophrenia, mood disorders, or autism. However, catatonia also occurs in the context of general neurologic and medical disorders, including (but not limited to) infections, metabolic disorders, endocrinopathies, epilepsy, neurodegenerative diseases, delirium, hypertensive encephalopathy, autoimmune encephalitis, and liver and kidney transplantation.³

Subtypes of catatonia include⁴:

• hypokinetic catatonia, which presents as stupor, mutism, and negativism
• hyperkinetic catatonia, which presents as hyperactivity, agitation, and stereotypy (as observed in Mr. S)
• malignant catatonia, which is a potentially lethal form of catatonia that occurs when hypo- or hyperkinetic catatonia is accompanied by autonomic instability such as tachycardia, tachypnea, hypertension, fever, and muscle rigidity
• periodic catatonia, which is characterized by brief episodes of stupor or excitatory catatonia lasting 4 to 10 days. These episodes recur over weeks to years, with patients remaining asymptomatic between episodes, or showing mild symptoms, such as facial grimacing or negativisms. Periodic catatonia often is autosomal dominant, involves linkage for the long arm of chromosome 15, and has a better prognosis than the other forms.

Autism and catatonia

Most individuals with autism who experience a catatonic episode first do so between age 10 and 19, and many episodes are precipitated by sudden changes in routine resulting in stress.⁵ An estimated 12% to 18% of patients with autism are diagnosed with catatonia in their lifetime, but the actual prevalence is likely higher.⁴

One of the reasons for this might be that although catatonia is well known in the psychiatric community, it is relatively unknown in the general medical community. Children and adolescents with psychiatric illness are likely to have symptoms of catatonia overlooked because catatonia often is not included in the differential diagnosis.⁶

In Mr. S’s case, it became clear that he did not have a mood disorder, but was prone to episodes of hyperkinetic catatonia due to his autism.

Continue to: Better recognition of catatonia

As catatonia becomes better elucidated and more clearly described in the literature, there is increasing awareness that symptoms do not always involve stupor, mutism, and slowed motor activity, but can include increased motor activity, agitation, and stereotypies. The BFCRS is extremely useful for quantifying symptoms of catatonia. The best way to confirm the diagnosis is to use a lorazepam challenge in an inpatient setting, or a trial of lorazepam in an outpatient setting.⁵

[polldaddy:10544548]

The authors’ observations

Lorazepam is often considered the first-line treatment for catatonia because it is one of the most widely studied medications. Other benzodiazepines, such as oxazepam and clonazepam, and the sedative/hypnotic zolpidem have also been shown to be effective. Antipsychotics with dopamine-blocking mechanisms can exacerbate symptoms of catatonia and should be avoided in these patients. Furthermore, in cases of refractory catatonia, bilateral electroconvulsive therapy is an important and necessary treatment.⁷

TREATMENT Pharmacologic agents decrease BFCRS score

Mr. S is prescribed a regimen of lorazepam, 2 mg by mouth daily, and the supplement N-acetylcysteine, 600 mg by mouth daily. Within 2 weeks of starting this regimen, Mr. S’s BFCRS score decreases from 26 to 14. After 6 months of treatment with lorazepam, Mr. S shows considerable improvement. The stereotypic behaviors and impulsivity decrease significantly, leading to improved sleep and performance in school. After 6 months Mr. S is successfully tapered off the lorazepam, with a complete return to baseline.

Bottom Line

Hyperkinetic catatonia is easily overlooked, especially in the emergency setting. Catatonia should always be ruled out, particularly in patients with underlying conditions associated with it. Hyperkinetic catatonia is an underrecognized comorbidity in patients with autism.

Related Resources

• Dhossche DM, Wing L, Ohta M, et al. International Review of Neurobiology: Catatonia in autism spectrum disorders, vol 72. New York, NY: Academic Press/Elsevier; 2006.
• Taylor MA, Fink M. Catatonia in psychiatric classification: a home of its own. Am J Psychiatry. 2003;160(7):1233-1241.

Drug Brand Names

Amantadine • Symmetrel
Bromocriptine • Parlodel
Clonazepam • Klonopin
Lorazepam • Ativan
Memantine • Namenda
Oxazepam • Serax
Quetiapine • Seroquel
Valproic acid • Depakene, Depakote
Zolpidem • Ambien

CASE Aggressive, impulsive, and not sleeping

Mr. S, age 22, is brought by his family to his outpatient psychiatrist because he has begun to exhibit motor and verbal tics, excessive adherence to rules and routines, and increased impulsivity and agitation.

Mr. S has significant language impairment and is unreliable as a narrator. His family reports that Mr. S’s behavior has resulted in declining academic performance, and they have curtailed his social activities due to behavioral issues. Both his family and teachers report that it is increasingly difficult to redirect Mr. S’s behavior. Although not physically aggressive, Mr. S becomes verbally agitated when rituals are incomplete. He has gone from sleeping 8 hours each night to only 3 to 4 hours, but he does not appear tired during the day.

HISTORY Multiple hospitalizations

As a child, Mr. S had been diagnosed with autism and intellectual disability. When he was 13, he began exhibiting marked stereotypy, restlessness, impulsivity, frenzy, agitation, combativeness, and purposeless motor activity. At that time, he was not receiving any medications. Mr. S had not slept for 2 days and had been walking in circles nonstop. He became aggressive whenever anyone attempted to redirect his behavior. The family took Mr. S to the emergency department (ED), where clinicians ruled out organic causes for his behavioral disturbances, including infections, drug intoxication, and use of illicit substances. Mr. S was transferred from the ED to a child and adolescent psychiatry ward at a nearby university hospital for inpatient treatment.

On the inpatient unit, the treatment team diagnosed Mr. S with bipolar disorder and believed that he was experiencing a manic episode. He was prescribed quetiapine, 25 mg by mouth during the day and 75 mg by mouth at night, to stabilize his agitation, and was discharged with a plan to follow up with his outpatient psychiatrist. However, within 1 week, his symptoms returned, with markedly increased aggression and agitation, so he was readmitted, tapered off quetiapine, and prescribed valproic acid, 125 mg by mouth during the day and 375 mg by mouth at bedtime. With this regimen, Mr. S became calmer, but when he was discharged home, he was subdued and withdrawn, overly adherent to rules and routines, constantly irritable, and often unable to focus.

Two years later, Mr. S developed hyperammonemia. Valproic acid was discontinued, and many of his behavioral issues resolved. He flourished both academically and socially. He experienced no exacerbation of symptoms until his current presentation.

[polldaddy:10544547]

EVALUATION Pinpointing the cause

Mr. S’s physical examination reveals that his vital signs are within normal limits. Mr. S is mildly tachycardic (heart rate, 105 bpm), with regular rate and rhythm. No murmurs, gallops, or rubs are auscultated. The remainder of the physical exam, including a detailed neurologic exam, is normal.

On mental status examination, Mr. S makes limited eye contact. He has difficulty sitting in the chair, with increased rocking, finger flicking, and hand flapping from baseline. Some compulsive behaviors are noted, such as tapping his neck. He has increased tics (eye blinking and mouth opening) and increased verbigeration and repetitive verbal statements. He loudly and repeatedly demands to go home, and uses short sentences with incorrect pronouns. His affect is difficult to assess, but he is agitated. His thought process is concrete. There is no evidence of suicidal ideation, homicidal ideation, or psychosis. Mr. S denies auditory hallucinations. His insight and judgment are limited.

Continue to: The psychiatrist rules out...

The psychiatrist rules out a behavioral exacerbation of autism based on an interview with Mr. S’s family and established rapport from treating him for several years. Mr. S’s family reports that many of his behaviors are not new but that the increased drive and intensity is worrisome. Further, his family cannot identify any stressors or precipitants for the behaviors and reports that offering preferred reinforcers did not help. An anxiety disorder is ruled out because according to the family, Mr. S’s drive to constantly move and complete rituals is fueling his anxiety. Schizoaffective disorder is ruled out because Mr. S denies auditory hallucinations and has not been observed responding to internal stimuli.

His Bush-Francis Catatonia Rating Scale (BFCRS) score is 26, which suggests a high likelihood of catatonia. Based on the BFCRS score, Mr. S’s psychiatrist makes the diagnosis of hyperkinetic catatonia.

The authors’ observations

The psychiatrist determined that Mr. S had been misdiagnosed with bipolar disorder at age 13. At that time, he had experienced his first episode of hyperkinetic catatonia and his symptoms decreased after he received lorazepam in the ED. However, the treatment team did not correctly identify this, most likely due to limited knowledge of catatonia among emergency medicine clinicians.

This case exemplifies a cognitive error of premature closure. Rather than considering catatonia as a complication of autism when Mr. S was 13, the clinicians added a second psychiatric diagnosis of bipolar disorder.Although premature closure errors generally occur when the physician assumes the patient is having a common complication of a known illness,¹ in Mr. S’s case, the opposite occurred.

Conceptualizing catatonia

One helpful model for conceptualizing catatonia is to think of it as a basal ganglia disorder, with lesions in the basal ganglia thalamocortical tracts and the anterior cingulate/medial orbitofrontal circuit. Disrupting these pathways can result in symptoms such as mutism or repetitive and imitative behaviors. This is likely due to decreased disinhibition by gamma-aminobutyric acid (GABA), resulting in a hypodopaminergic state. This explains why benzodiazepines, which act to increase GABA, are effective for treating catatonia, and antipsychotics that act to decrease dopamine can exacerbate symptoms. Fricchione et al² developed a model to visually represent the neurobiologic pathophysiology of catatonia (Figure²).

Continue to: Underlying causes of catatonia

Catatonia is most often seen in individuals with an underlying psychiatric condition such as schizophrenia, mood disorders, or autism. However, catatonia also occurs in the context of general neurologic and medical disorders, including (but not limited to) infections, metabolic disorders, endocrinopathies, epilepsy, neurodegenerative diseases, delirium, hypertensive encephalopathy, autoimmune encephalitis, and liver and kidney transplantation.³

Subtypes of catatonia include⁴:

• hypokinetic catatonia, which presents as stupor, mutism, and negativism
• hyperkinetic catatonia, which presents as hyperactivity, agitation, and stereotypy (as observed in Mr. S)
• malignant catatonia, which is a potentially lethal form of catatonia that occurs when hypo- or hyperkinetic catatonia is accompanied by autonomic instability such as tachycardia, tachypnea, hypertension, fever, and muscle rigidity
• periodic catatonia, which is characterized by brief episodes of stupor or excitatory catatonia lasting 4 to 10 days. These episodes recur over weeks to years, with patients remaining asymptomatic between episodes, or showing mild symptoms, such as facial grimacing or negativisms. Periodic catatonia often is autosomal dominant, involves linkage for the long arm of chromosome 15, and has a better prognosis than the other forms.

Autism and catatonia

Most individuals with autism who experience a catatonic episode first do so between age 10 and 19, and many episodes are precipitated by sudden changes in routine resulting in stress.⁵ An estimated 12% to 18% of patients with autism are diagnosed with catatonia in their lifetime, but the actual prevalence is likely higher.⁴

One of the reasons for this might be that although catatonia is well known in the psychiatric community, it is relatively unknown in the general medical community. Children and adolescents with psychiatric illness are likely to have symptoms of catatonia overlooked because catatonia often is not included in the differential diagnosis.⁶

In Mr. S’s case, it became clear that he did not have a mood disorder, but was prone to episodes of hyperkinetic catatonia due to his autism.

Continue to: Better recognition of catatonia

As catatonia becomes better elucidated and more clearly described in the literature, there is increasing awareness that symptoms do not always involve stupor, mutism, and slowed motor activity, but can include increased motor activity, agitation, and stereotypies. The BFCRS is extremely useful for quantifying symptoms of catatonia. The best way to confirm the diagnosis is to use a lorazepam challenge in an inpatient setting, or a trial of lorazepam in an outpatient setting.⁵

[polldaddy:10544548]

The authors’ observations

Lorazepam is often considered the first-line treatment for catatonia because it is one of the most widely studied medications. Other benzodiazepines, such as oxazepam and clonazepam, and the sedative/hypnotic zolpidem have also been shown to be effective. Antipsychotics with dopamine-blocking mechanisms can exacerbate symptoms of catatonia and should be avoided in these patients. Furthermore, in cases of refractory catatonia, bilateral electroconvulsive therapy is an important and necessary treatment.⁷

TREATMENT Pharmacologic agents decrease BFCRS score

Mr. S is prescribed a regimen of lorazepam, 2 mg by mouth daily, and the supplement N-acetylcysteine, 600 mg by mouth daily. Within 2 weeks of starting this regimen, Mr. S’s BFCRS score decreases from 26 to 14. After 6 months of treatment with lorazepam, Mr. S shows considerable improvement. The stereotypic behaviors and impulsivity decrease significantly, leading to improved sleep and performance in school. After 6 months Mr. S is successfully tapered off the lorazepam, with a complete return to baseline.

Bottom Line

Hyperkinetic catatonia is easily overlooked, especially in the emergency setting. Catatonia should always be ruled out, particularly in patients with underlying conditions associated with it. Hyperkinetic catatonia is an underrecognized comorbidity in patients with autism.

Related Resources

• Dhossche DM, Wing L, Ohta M, et al. International Review of Neurobiology: Catatonia in autism spectrum disorders, vol 72. New York, NY: Academic Press/Elsevier; 2006.
• Taylor MA, Fink M. Catatonia in psychiatric classification: a home of its own. Am J Psychiatry. 2003;160(7):1233-1241.

Drug Brand Names

Amantadine • Symmetrel
Bromocriptine • Parlodel
Clonazepam • Klonopin
Lorazepam • Ativan
Memantine • Namenda
Oxazepam • Serax
Quetiapine • Seroquel
Valproic acid • Depakene, Depakote
Zolpidem • Ambien

CASE Aggressive, impulsive, and not sleeping

Mr. S, age 22, is brought by his family to his outpatient psychiatrist because he has begun to exhibit motor and verbal tics, excessive adherence to rules and routines, and increased impulsivity and agitation.

Mr. S has significant language impairment and is unreliable as a narrator. His family reports that Mr. S’s behavior has resulted in declining academic performance, and they have curtailed his social activities due to behavioral issues. Both his family and teachers report that it is increasingly difficult to redirect Mr. S’s behavior. Although not physically aggressive, Mr. S becomes verbally agitated when rituals are incomplete. He has gone from sleeping 8 hours each night to only 3 to 4 hours, but he does not appear tired during the day.

HISTORY Multiple hospitalizations

As a child, Mr. S had been diagnosed with autism and intellectual disability. When he was 13, he began exhibiting marked stereotypy, restlessness, impulsivity, frenzy, agitation, combativeness, and purposeless motor activity. At that time, he was not receiving any medications. Mr. S had not slept for 2 days and had been walking in circles nonstop. He became aggressive whenever anyone attempted to redirect his behavior. The family took Mr. S to the emergency department (ED), where clinicians ruled out organic causes for his behavioral disturbances, including infections, drug intoxication, and use of illicit substances. Mr. S was transferred from the ED to a child and adolescent psychiatry ward at a nearby university hospital for inpatient treatment.

On the inpatient unit, the treatment team diagnosed Mr. S with bipolar disorder and believed that he was experiencing a manic episode. He was prescribed quetiapine, 25 mg by mouth during the day and 75 mg by mouth at night, to stabilize his agitation, and was discharged with a plan to follow up with his outpatient psychiatrist. However, within 1 week, his symptoms returned, with markedly increased aggression and agitation, so he was readmitted, tapered off quetiapine, and prescribed valproic acid, 125 mg by mouth during the day and 375 mg by mouth at bedtime. With this regimen, Mr. S became calmer, but when he was discharged home, he was subdued and withdrawn, overly adherent to rules and routines, constantly irritable, and often unable to focus.

Two years later, Mr. S developed hyperammonemia. Valproic acid was discontinued, and many of his behavioral issues resolved. He flourished both academically and socially. He experienced no exacerbation of symptoms until his current presentation.

[polldaddy:10544547]

EVALUATION Pinpointing the cause

Mr. S’s physical examination reveals that his vital signs are within normal limits. Mr. S is mildly tachycardic (heart rate, 105 bpm), with regular rate and rhythm. No murmurs, gallops, or rubs are auscultated. The remainder of the physical exam, including a detailed neurologic exam, is normal.

On mental status examination, Mr. S makes limited eye contact. He has difficulty sitting in the chair, with increased rocking, finger flicking, and hand flapping from baseline. Some compulsive behaviors are noted, such as tapping his neck. He has increased tics (eye blinking and mouth opening) and increased verbigeration and repetitive verbal statements. He loudly and repeatedly demands to go home, and uses short sentences with incorrect pronouns. His affect is difficult to assess, but he is agitated. His thought process is concrete. There is no evidence of suicidal ideation, homicidal ideation, or psychosis. Mr. S denies auditory hallucinations. His insight and judgment are limited.

Continue to: The psychiatrist rules out...

The psychiatrist rules out a behavioral exacerbation of autism based on an interview with Mr. S’s family and established rapport from treating him for several years. Mr. S’s family reports that many of his behaviors are not new but that the increased drive and intensity is worrisome. Further, his family cannot identify any stressors or precipitants for the behaviors and reports that offering preferred reinforcers did not help. An anxiety disorder is ruled out because according to the family, Mr. S’s drive to constantly move and complete rituals is fueling his anxiety. Schizoaffective disorder is ruled out because Mr. S denies auditory hallucinations and has not been observed responding to internal stimuli.

His Bush-Francis Catatonia Rating Scale (BFCRS) score is 26, which suggests a high likelihood of catatonia. Based on the BFCRS score, Mr. S’s psychiatrist makes the diagnosis of hyperkinetic catatonia.

The authors’ observations

The psychiatrist determined that Mr. S had been misdiagnosed with bipolar disorder at age 13. At that time, he had experienced his first episode of hyperkinetic catatonia and his symptoms decreased after he received lorazepam in the ED. However, the treatment team did not correctly identify this, most likely due to limited knowledge of catatonia among emergency medicine clinicians.

This case exemplifies a cognitive error of premature closure. Rather than considering catatonia as a complication of autism when Mr. S was 13, the clinicians added a second psychiatric diagnosis of bipolar disorder.Although premature closure errors generally occur when the physician assumes the patient is having a common complication of a known illness,¹ in Mr. S’s case, the opposite occurred.

Conceptualizing catatonia

One helpful model for conceptualizing catatonia is to think of it as a basal ganglia disorder, with lesions in the basal ganglia thalamocortical tracts and the anterior cingulate/medial orbitofrontal circuit. Disrupting these pathways can result in symptoms such as mutism or repetitive and imitative behaviors. This is likely due to decreased disinhibition by gamma-aminobutyric acid (GABA), resulting in a hypodopaminergic state. This explains why benzodiazepines, which act to increase GABA, are effective for treating catatonia, and antipsychotics that act to decrease dopamine can exacerbate symptoms. Fricchione et al² developed a model to visually represent the neurobiologic pathophysiology of catatonia (Figure²).

Continue to: Underlying causes of catatonia

Catatonia is most often seen in individuals with an underlying psychiatric condition such as schizophrenia, mood disorders, or autism. However, catatonia also occurs in the context of general neurologic and medical disorders, including (but not limited to) infections, metabolic disorders, endocrinopathies, epilepsy, neurodegenerative diseases, delirium, hypertensive encephalopathy, autoimmune encephalitis, and liver and kidney transplantation.³

Subtypes of catatonia include⁴:

• hypokinetic catatonia, which presents as stupor, mutism, and negativism
• hyperkinetic catatonia, which presents as hyperactivity, agitation, and stereotypy (as observed in Mr. S)
• malignant catatonia, which is a potentially lethal form of catatonia that occurs when hypo- or hyperkinetic catatonia is accompanied by autonomic instability such as tachycardia, tachypnea, hypertension, fever, and muscle rigidity
• periodic catatonia, which is characterized by brief episodes of stupor or excitatory catatonia lasting 4 to 10 days. These episodes recur over weeks to years, with patients remaining asymptomatic between episodes, or showing mild symptoms, such as facial grimacing or negativisms. Periodic catatonia often is autosomal dominant, involves linkage for the long arm of chromosome 15, and has a better prognosis than the other forms.

Autism and catatonia

Most individuals with autism who experience a catatonic episode first do so between age 10 and 19, and many episodes are precipitated by sudden changes in routine resulting in stress.⁵ An estimated 12% to 18% of patients with autism are diagnosed with catatonia in their lifetime, but the actual prevalence is likely higher.⁴

One of the reasons for this might be that although catatonia is well known in the psychiatric community, it is relatively unknown in the general medical community. Children and adolescents with psychiatric illness are likely to have symptoms of catatonia overlooked because catatonia often is not included in the differential diagnosis.⁶

In Mr. S’s case, it became clear that he did not have a mood disorder, but was prone to episodes of hyperkinetic catatonia due to his autism.

Continue to: Better recognition of catatonia

As catatonia becomes better elucidated and more clearly described in the literature, there is increasing awareness that symptoms do not always involve stupor, mutism, and slowed motor activity, but can include increased motor activity, agitation, and stereotypies. The BFCRS is extremely useful for quantifying symptoms of catatonia. The best way to confirm the diagnosis is to use a lorazepam challenge in an inpatient setting, or a trial of lorazepam in an outpatient setting.⁵

[polldaddy:10544548]

The authors’ observations

Lorazepam is often considered the first-line treatment for catatonia because it is one of the most widely studied medications. Other benzodiazepines, such as oxazepam and clonazepam, and the sedative/hypnotic zolpidem have also been shown to be effective. Antipsychotics with dopamine-blocking mechanisms can exacerbate symptoms of catatonia and should be avoided in these patients. Furthermore, in cases of refractory catatonia, bilateral electroconvulsive therapy is an important and necessary treatment.⁷

TREATMENT Pharmacologic agents decrease BFCRS score

Mr. S is prescribed a regimen of lorazepam, 2 mg by mouth daily, and the supplement N-acetylcysteine, 600 mg by mouth daily. Within 2 weeks of starting this regimen, Mr. S’s BFCRS score decreases from 26 to 14. After 6 months of treatment with lorazepam, Mr. S shows considerable improvement. The stereotypic behaviors and impulsivity decrease significantly, leading to improved sleep and performance in school. After 6 months Mr. S is successfully tapered off the lorazepam, with a complete return to baseline.

Bottom Line

Hyperkinetic catatonia is easily overlooked, especially in the emergency setting. Catatonia should always be ruled out, particularly in patients with underlying conditions associated with it. Hyperkinetic catatonia is an underrecognized comorbidity in patients with autism.

Related Resources

• Dhossche DM, Wing L, Ohta M, et al. International Review of Neurobiology: Catatonia in autism spectrum disorders, vol 72. New York, NY: Academic Press/Elsevier; 2006.
• Taylor MA, Fink M. Catatonia in psychiatric classification: a home of its own. Am J Psychiatry. 2003;160(7):1233-1241.

Drug Brand Names

Amantadine • Symmetrel
Bromocriptine • Parlodel
Clonazepam • Klonopin
Lorazepam • Ativan
Memantine • Namenda
Oxazepam • Serax
Quetiapine • Seroquel
Valproic acid • Depakene, Depakote
Zolpidem • Ambien

A 4-month intensive program of family-focused therapy worked better than a less-intensive program in delaying new mood episodes among young people at risk of developing bipolar disorder, new research shows.

“This study extends the results of other randomized clinical trials indicating effects of family psychoeducation and skill training on the long-term trajectory of depressive symptoms in pediatric mood disorders,” wrote David J. Miklowitz, PhD, of the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, and colleagues. The study was published in JAMA Psychiatry.

For their research, the investigators recruited 127 subjects aged 9-17 years (mean age, 13 years) deemed at high risk for later bipolar I or II disorder for having depression or subthreshold mania along with active mood symptoms and a family history of bipolar disorder. Some 85% of subjects had depression symptoms at enrollment.

Subjects were randomized to 12 sessions over 4 months of family-focused therapy – a psychoeducation, communication, and problem-solving training program incorporating caretakers and also siblings if possible (n = 61) – or to 3 sessions of family-focused therapy and an additional 3 of individual therapy in the same 4-month time frame (n = 66). Medication was allowed for all subjects, and patients were followed for a median 2 years after the intervention. Baseline characteristics, medication use, and dropout rates were similar between the groups.

Both groups saw similarly high rates of new episodes of major depression, mania, or hypomania during follow-up; however, those in the intensive family-focused therapy group saw longer intervals of wellness, with a median 81 weeks (95% confidence interval, 56-123 weeks) from randomization until the first observed mood episode, compared with 63 weeks (95% CI, 44-78 weeks) to an episode for the less-intensive group (P = .03). Dr. Miklowitz and colleagues did not find differences in the severity of mood episodes following either treatment mode or in later conversion to bipolar I or II.

The researchers described as limitations of their study its inability to measure the “temporal relationship between changes in family communication and symptom changes in patients,” which would help answer whether improvements in communication patterns aid symptom regulation, or whether more stable patients are better able to manage difficult family interactions.

Family-focused therapy “may have uniquely enduring effects that extend into the maintenance phase of treatment,” Dr. Miklowitz and colleagues wrote.

The study was funded by the National Institute of Mental Health. Several coauthors, including the lead author, reported receiving research grants from NIMH and other foundations. Two additional coauthors reported receiving pharmaceutical industry funding, including advisory board and consulting fees.

SOURCE: Miklowitz DJ et al. JAMA Psychiatry. 2020 Jan 15. doi: 10.1001/jamapsychiatry.2019.4520.

A 4-month intensive program of family-focused therapy worked better than a less-intensive program in delaying new mood episodes among young people at risk of developing bipolar disorder, new research shows.

“This study extends the results of other randomized clinical trials indicating effects of family psychoeducation and skill training on the long-term trajectory of depressive symptoms in pediatric mood disorders,” wrote David J. Miklowitz, PhD, of the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, and colleagues. The study was published in JAMA Psychiatry.

For their research, the investigators recruited 127 subjects aged 9-17 years (mean age, 13 years) deemed at high risk for later bipolar I or II disorder for having depression or subthreshold mania along with active mood symptoms and a family history of bipolar disorder. Some 85% of subjects had depression symptoms at enrollment.

Subjects were randomized to 12 sessions over 4 months of family-focused therapy – a psychoeducation, communication, and problem-solving training program incorporating caretakers and also siblings if possible (n = 61) – or to 3 sessions of family-focused therapy and an additional 3 of individual therapy in the same 4-month time frame (n = 66). Medication was allowed for all subjects, and patients were followed for a median 2 years after the intervention. Baseline characteristics, medication use, and dropout rates were similar between the groups.

Both groups saw similarly high rates of new episodes of major depression, mania, or hypomania during follow-up; however, those in the intensive family-focused therapy group saw longer intervals of wellness, with a median 81 weeks (95% confidence interval, 56-123 weeks) from randomization until the first observed mood episode, compared with 63 weeks (95% CI, 44-78 weeks) to an episode for the less-intensive group (P = .03). Dr. Miklowitz and colleagues did not find differences in the severity of mood episodes following either treatment mode or in later conversion to bipolar I or II.

The researchers described as limitations of their study its inability to measure the “temporal relationship between changes in family communication and symptom changes in patients,” which would help answer whether improvements in communication patterns aid symptom regulation, or whether more stable patients are better able to manage difficult family interactions.

Family-focused therapy “may have uniquely enduring effects that extend into the maintenance phase of treatment,” Dr. Miklowitz and colleagues wrote.

The study was funded by the National Institute of Mental Health. Several coauthors, including the lead author, reported receiving research grants from NIMH and other foundations. Two additional coauthors reported receiving pharmaceutical industry funding, including advisory board and consulting fees.

SOURCE: Miklowitz DJ et al. JAMA Psychiatry. 2020 Jan 15. doi: 10.1001/jamapsychiatry.2019.4520.

A 4-month intensive program of family-focused therapy worked better than a less-intensive program in delaying new mood episodes among young people at risk of developing bipolar disorder, new research shows.

“This study extends the results of other randomized clinical trials indicating effects of family psychoeducation and skill training on the long-term trajectory of depressive symptoms in pediatric mood disorders,” wrote David J. Miklowitz, PhD, of the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, and colleagues. The study was published in JAMA Psychiatry.

For their research, the investigators recruited 127 subjects aged 9-17 years (mean age, 13 years) deemed at high risk for later bipolar I or II disorder for having depression or subthreshold mania along with active mood symptoms and a family history of bipolar disorder. Some 85% of subjects had depression symptoms at enrollment.

Subjects were randomized to 12 sessions over 4 months of family-focused therapy – a psychoeducation, communication, and problem-solving training program incorporating caretakers and also siblings if possible (n = 61) – or to 3 sessions of family-focused therapy and an additional 3 of individual therapy in the same 4-month time frame (n = 66). Medication was allowed for all subjects, and patients were followed for a median 2 years after the intervention. Baseline characteristics, medication use, and dropout rates were similar between the groups.

Both groups saw similarly high rates of new episodes of major depression, mania, or hypomania during follow-up; however, those in the intensive family-focused therapy group saw longer intervals of wellness, with a median 81 weeks (95% confidence interval, 56-123 weeks) from randomization until the first observed mood episode, compared with 63 weeks (95% CI, 44-78 weeks) to an episode for the less-intensive group (P = .03). Dr. Miklowitz and colleagues did not find differences in the severity of mood episodes following either treatment mode or in later conversion to bipolar I or II.

The researchers described as limitations of their study its inability to measure the “temporal relationship between changes in family communication and symptom changes in patients,” which would help answer whether improvements in communication patterns aid symptom regulation, or whether more stable patients are better able to manage difficult family interactions.

Family-focused therapy “may have uniquely enduring effects that extend into the maintenance phase of treatment,” Dr. Miklowitz and colleagues wrote.

The study was funded by the National Institute of Mental Health. Several coauthors, including the lead author, reported receiving research grants from NIMH and other foundations. Two additional coauthors reported receiving pharmaceutical industry funding, including advisory board and consulting fees.

SOURCE: Miklowitz DJ et al. JAMA Psychiatry. 2020 Jan 15. doi: 10.1001/jamapsychiatry.2019.4520.

Since publication of the first Diagnostic and Statistical Manual of Mental Disorders (DSM) in 1952,¹ the diagnosis of manic and hypomanic symptoms has evolved significantly. This evolution has changed my approach to patients who exhibit these symptoms, which include increased goal-directed activity, decreased need for sleep, and racing thoughts. Here I outline these diagnostic changes in each edition of the DSM and discuss their therapeutic importance and the possibility of future changes.

DSM-I (1952) described manic symptoms as having psychotic features.¹ The term “manic episode” was not used, but manic symptoms were described as having a “tendency to remission and recurrence.”¹

DSM-II (1968) introduced the term “manic episode” as having psychotic features.² Manic episodes were characterized by symptoms of excessive elation, irritability, talkativeness, flight of ideas, and accelerated speech and motor activity.²

DSM-III (1980) explained that a manic episode could occur without psychotic features.³ The term “hypomanic episode” was introduced. It described manic features that do not meet criteria for a manic episode.³

DSM-IV (1994) reiterated the criteria for a manic episode.⁴ In addition, it established criteria for a hypomanic episode as lasting at least 4 days and requires ≥3 symptoms.⁴

DSM-5 (2013) describes hypomanic symptoms that do not meet criteria for a hypomanic episode (Table).⁵ These symptoms may require treatment with a mood stabilizer or antipsychotic medication.⁵

Suggested changes for the next DSM

Although DSM-5 does not discuss the duration of different manic or hypomanic symptoms in the same patient, these can vary widely.⁶ The same patient may have increased activity for 2 days, increased irritability for 2 weeks, and racing thoughts every day. Future versions of the DSM could include the varying durations of different manic or hypomanic symptoms in the same patient.

Continue to: Racing thoughts without...

Racing thoughts without increased energy or activity occur frequently and often go unnoticed.⁷ They can be mistaken for severe worrying or obsessive ideation. Depending on the severity of the patient’s racing thoughts, treatment might include a mood stabilizer or antipsychotic. All 5 DSM-5 diagnoses listed in the Table⁵ may include this symptom pattern, but do not specifically mention it. A diagnosis or specifier, such as “racing thoughts without increased energy or activity,” might help clinicians better recognize and treat this symptom pattern.

Since publication of the first Diagnostic and Statistical Manual of Mental Disorders (DSM) in 1952,¹ the diagnosis of manic and hypomanic symptoms has evolved significantly. This evolution has changed my approach to patients who exhibit these symptoms, which include increased goal-directed activity, decreased need for sleep, and racing thoughts. Here I outline these diagnostic changes in each edition of the DSM and discuss their therapeutic importance and the possibility of future changes.

DSM-I (1952) described manic symptoms as having psychotic features.¹ The term “manic episode” was not used, but manic symptoms were described as having a “tendency to remission and recurrence.”¹

DSM-II (1968) introduced the term “manic episode” as having psychotic features.² Manic episodes were characterized by symptoms of excessive elation, irritability, talkativeness, flight of ideas, and accelerated speech and motor activity.²

DSM-III (1980) explained that a manic episode could occur without psychotic features.³ The term “hypomanic episode” was introduced. It described manic features that do not meet criteria for a manic episode.³

DSM-IV (1994) reiterated the criteria for a manic episode.⁴ In addition, it established criteria for a hypomanic episode as lasting at least 4 days and requires ≥3 symptoms.⁴

DSM-5 (2013) describes hypomanic symptoms that do not meet criteria for a hypomanic episode (Table).⁵ These symptoms may require treatment with a mood stabilizer or antipsychotic medication.⁵

Suggested changes for the next DSM

Although DSM-5 does not discuss the duration of different manic or hypomanic symptoms in the same patient, these can vary widely.⁶ The same patient may have increased activity for 2 days, increased irritability for 2 weeks, and racing thoughts every day. Future versions of the DSM could include the varying durations of different manic or hypomanic symptoms in the same patient.

Continue to: Racing thoughts without...

Racing thoughts without increased energy or activity occur frequently and often go unnoticed.⁷ They can be mistaken for severe worrying or obsessive ideation. Depending on the severity of the patient’s racing thoughts, treatment might include a mood stabilizer or antipsychotic. All 5 DSM-5 diagnoses listed in the Table⁵ may include this symptom pattern, but do not specifically mention it. A diagnosis or specifier, such as “racing thoughts without increased energy or activity,” might help clinicians better recognize and treat this symptom pattern.

Since publication of the first Diagnostic and Statistical Manual of Mental Disorders (DSM) in 1952,¹ the diagnosis of manic and hypomanic symptoms has evolved significantly. This evolution has changed my approach to patients who exhibit these symptoms, which include increased goal-directed activity, decreased need for sleep, and racing thoughts. Here I outline these diagnostic changes in each edition of the DSM and discuss their therapeutic importance and the possibility of future changes.

DSM-I (1952) described manic symptoms as having psychotic features.¹ The term “manic episode” was not used, but manic symptoms were described as having a “tendency to remission and recurrence.”¹

DSM-II (1968) introduced the term “manic episode” as having psychotic features.² Manic episodes were characterized by symptoms of excessive elation, irritability, talkativeness, flight of ideas, and accelerated speech and motor activity.²

DSM-III (1980) explained that a manic episode could occur without psychotic features.³ The term “hypomanic episode” was introduced. It described manic features that do not meet criteria for a manic episode.³

DSM-IV (1994) reiterated the criteria for a manic episode.⁴ In addition, it established criteria for a hypomanic episode as lasting at least 4 days and requires ≥3 symptoms.⁴

DSM-5 (2013) describes hypomanic symptoms that do not meet criteria for a hypomanic episode (Table).⁵ These symptoms may require treatment with a mood stabilizer or antipsychotic medication.⁵

Suggested changes for the next DSM

Although DSM-5 does not discuss the duration of different manic or hypomanic symptoms in the same patient, these can vary widely.⁶ The same patient may have increased activity for 2 days, increased irritability for 2 weeks, and racing thoughts every day. Future versions of the DSM could include the varying durations of different manic or hypomanic symptoms in the same patient.

Continue to: Racing thoughts without...

Racing thoughts without increased energy or activity occur frequently and often go unnoticed.⁷ They can be mistaken for severe worrying or obsessive ideation. Depending on the severity of the patient’s racing thoughts, treatment might include a mood stabilizer or antipsychotic. All 5 DSM-5 diagnoses listed in the Table⁵ may include this symptom pattern, but do not specifically mention it. A diagnosis or specifier, such as “racing thoughts without increased energy or activity,” might help clinicians better recognize and treat this symptom pattern.

CASE Bipolar-like symptoms

Mr. R, age 48, presents to the psychiatric emergency department (ED) for the third time in 4 days after a change in his behavior over the last 2.5 weeks. He exhibits heightened extroversion, pressured speech, and uncharacteristic irritability. Mr. R’s wife reports that her husband normally is reserved.

Mr. R’s wife first became concerned when she noticed he was not sleeping and spending his nights changing the locks on their home. Mr. R, who is a business executive, occupied his time by taking notes on ways to protect his identity from the senior partners at his company.

Three weeks before his first ED visit, Mr. R had been treated for a neck abscess with incision and drainage. He was sent home with a 10-day course of amoxicillin/clavulanate, 875/125 mg by mouth twice daily. There were no reports of steroid use during or after the procedure. Four days after starting the antibiotic, he stopped taking it because he and his wife felt it was contributing to his mood changes and bizarre behavior.

During his first visit to the ED, Mr. R received a 1-time dose of olanzapine, 5 mg by mouth, which helped temporarily reduce his anxiety; however, he returned the following day with the same anxiety symptoms and was discharged with a 30-day prescription for olanzapine, 5 mg/d, to manage symptoms until he could establish care with an outpatient psychiatrist. Two days later, he returned to the ED yet again convinced people were spying on him and that his coworkers were plotting to have him fired. He was not taking his phone to work due to fears that it would be hacked.

Mr. R’s only home medication is clomiphene citrate, 100 mg/d by mouth, which he’s received for the past 7 months to treat low testosterone. He has no personal or family history of psychiatric illness and no prior signs of mania or hypomania.

At the current ED visit, Mr. R’s testosterone level is checked and is within normal limits. His urine drug screen, head CT, and standard laboratory test results are unremarkable, except for mild transaminitis that does not warrant acute management.

The clinicians in the ED establish a diagnosis of mania, unspecified, and psychotic disorder, unspecified. They recommend that Mr. R be admitted for mood stabilization.

[polldaddy:10485725]

Continue to: The authors' observations

Our initial impression was that Mr. R was experiencing a manic episode from undiagnosed bipolar I disorder. The diagnosis was equivocal considering his age, lack of family history, and absence of prior psychiatric symptoms. In most cases, the mean age of onset for mania is late adolescence to early adulthood. It would be less common for a patient to experience a first manic episode at age 48, although mania may emerge at any age. Results from a large British study showed that the incidence of a first manic episode drops from 13.81% in men age 16 to 25 to 2.62% in men age 46 to 55.¹ However, some estimates suggest that the prevalence of late-onset mania is much higher than previously expected; medical comorbidities, such as dementia and delirium, may play a significant role in posing as manic-type symptoms in these patients.²

In Mr. R’s case, he remained fully alert and oriented without waxing and waning attentional deficits, which made delirium less likely. His affective symptoms included a reduced need for sleep, anxiety, irritability, rapid speech, and grandiosity lasting at least 2 weeks. He also exhibited psychotic symptoms in the form of paranoia. Altogether, he fit diagnostic criteria for bipolar I disorder well.

At the time of his manic episode, Mr. R was taking clomiphene. Clomiphene-induced mania and psychosis has been reported scarcely in the literature.³ In these cases, behavioral changes occurred within the first month of clomiphene initiation, which is dissimilar from Mr. R’s timeline.⁴ However, there appeared to be a temporal relationship between Mr. R’s use of amoxicillin/clavulanate and his manic episode.

This led us to consider whether medication-induced bipolar disorder would be a more appropriate diagnosis. There are documented associations between mania and antibiotics⁵; however, to our knowledge, mania secondary specifically to amoxicillin/clavulanate has not been reported extensively in the American literature. We found 1 case of suspected amoxicillin-induced psychosis,⁶ as well as a case report from the Netherlands of possible amoxicillin/clavulanate-induced mania.⁷

EVALUATION Ongoing paranoia

During his psychiatric hospitalization, Mr. R remains cooperative and polite, but exhibits ongoing paranoia, pressured speech, and poor reality testing. He remains convinced that “people are out to get me,” and routinely scans the room for safety during daily evaluations. He reports that he feels safe in the hospital, but does not feel safe to leave. Mr. R does not recall if in the past he had taken any products containing amoxicillin, but he is able to appreciate changes in his mood after being prescribed the antibiotic. He reports that starting the antibiotic made him feel confident in social interactions.

Continue to: During Mr. R's psychiatric hospitalization...

During Mr. R’s psychiatric hospitalization, olanzapine is titrated to 10 mg at bedtime. Clomiphene citrate is discontinued to limit any potential precipitants of mania, and amoxicillin/clavulanate is not restarted.

Mr. R gradually shows improvement in sleep quality and duration and becomes less irritable. His speech returns to a regular rate and rhythm. He eventually begins to question whether his fears were reality-based. After 4 days, Mr. R is ready to be discharged home and return to work.

[polldaddy:10485726]

The authors’ observations

The term “antibiomania” is used to describe manic episodes that coincide with antibiotic usage.⁸ Clarithromycin and ciprofloxacin are the agents most frequently implicated in antibiomania.⁹ While numerous reports exist in the literature, antibiomania is still considered a rare or unusual adverse event.

The link between infections and neuropsychiatric symptoms is well documented, which makes it challenging to tease apart the role of the acute infection from the use of antibiotics in precipitating psychiatric symptoms. However, in most reported cases of antibiomania, the onset of manic symptoms typically occurs within the first week of antibiotic initiation and resolves 1 to 3 days after medication discontinuation. The temporal relationship between antibiotic initiation and onset of neuropsychiatric symptoms has been best highlighted in cases where clarithromycin is used to treat a chronic Helicobacter pylori infection.¹⁰

While reports of antibiomania date back more than 6 decades, the exact mechanism by which antibiotics cause psychiatric symptoms is mostly unknown, although there are several hypotheses.⁵ Many hypotheses suggest some antibiotics play a role in reducing gamma-aminobutyric acid (GABA) neurotransmission. Quinolones, for example, have been found to cross the blood–brain barrier and can inhibit GABA from binding to the receptor sites. This can result in hyper-excitability in the CNS. Several quinolones have been implicated in antibiomania (Table 1⁵). Penicillins are also thought to interfere with GABA neurotransmission in a similar fashion; however, amoxicillin-clavulanate has poor CNS penetration in the absence of blood–brain barrier disruption,¹¹ which makes this theory a less plausible explanation for Mr. R’s case.

Continue to: Another possible mechanism...

Another possible mechanism of antibiotic-induced CNS excitability is through the glutamatergic system. Cycloserine, an antitubercular agent, is an N-methyl-D-aspartate receptor (NMDA) partial agonist and has reported neuropsychiatric adverse effects.¹² It has been proposed that quinolones may also have NMDA agonist activity.

The prostaglandin hypothesis suggests that a decrease in GABA may increase concentrations of steroid hormones in the rat CNS.¹³ Steroids have been implicated in the breakdown of prostaglandin E1 (PGE1).¹³ A disruption in steroid regulation may prevent PGE1 breakdown. Lithium’s antimanic properties are thought to be caused at least in part by limiting prostaglandin production.¹⁴ Thus, a shift in PGE1 may lead to mood dysregulation.

Bipolar disorder has been linked with mitochondrial function abnormalities.¹⁵ Antibiotics that target ribosomal RNA may disrupt normal mitochondrial function and increase risk for mania precipitation.¹⁵ However, amoxicillin exerts its antibiotic effects through binding to penicillin-binding proteins, which leads to inhibition of the cell wall biosynthesis.

Lastly, research into the microbiome has elucidated the gut-brain axis. In animal studies, the microbiome has been found to play a role in immunity, cognitive function, and behavior. Dysbiosis in the microbiome is currently being investigated for its role in schizophrenia and bipolar disorder.¹⁶ Both the microbiome and changes in mitochondrial function are thought to develop over time, so while these are plausible explanations, an onset within 4 days of antibiotic initiation is likely too short of an exposure time to produce these changes.

The most likely causes of Mr. R’s manic episode were clomiphene or amoxicillin-clavulanate, and the time course seems to indicate the antibiotic was the most likely culprit. Table 2 lists things to consider if you suspect your patient may be experiencing antibiomania.

Continue to: TREATMENT Stable on olanzapine

TREATMENT Stable on olanzapine

During his first visit to the outpatient clinic 4 weeks after being discharged, Mr. R reports that he has successfully returned to work, and his paranoia has completely resolved. He continues to take olanzapine, 10 mg nightly, and has restarted clomiphene, 100 mg/d.

During this outpatient follow-up visit, Mr. R attributes his manic episode to an adverse reaction to amoxicillin/clavulanate, and requests to be tapered off olanzapine. After he and his psychiatrist discuss the risk of relapse in untreated bipolar disorder, olanzapine is reduced to 7.5 mg at bedtime with a plan to taper to discontinuation.

At his second follow-up visit 1 month later, Mr. R has also stopped clomiphene and is taking a herbal supplement instead, which he reports is helpful for his fatigue. He says his mood is stable and denies experiencing any manic or depressive symptoms. Olanzapine is discontinued at this visit.

[polldaddy:10485727]

OUTCOME Lasting euthymic mood

Mr. R agrees to our recommendation of continuing to monitor him every 3 months for at least 1 year. We provide him and his wife with education about early warning signs of mood instability. Eight months after his manic episode, Mr. R no longer receives any psychotropic medications and shows no signs of mood instability. His mood remains euthymic and he is able to function well at work and in his personal life.

Bottom Line

‘Antibiomania’ describes manic episodes that coincide with antibiotic usage. This adverse effect is rare but should be considered in patients who present with unexplained first-episode mania, particularly those with an initial onset of mania after early adulthood.

Continue to: Related Resources

• Rakofsky JJ, Dunlop BW. Nothing to sneeze at: Upper respiratory infections and mood disorders. Current Psychiatry. 2019;18(7):29-34.
• Adiba A, Jackson JC, Torrence CL. Older-age bipolar disorder: A case series. Current Psychiatry. 2019;18(2):24-29

Drug Brand Names

Amoxicillin • Amoxil
Amoxicillin/clavulanate • Augmentin
Ampicillin • Omnipen-N, Polycillin-N
Ciprofloxacin • Cipro
Clarithromycin • Biaxin
Clomiphene • Clomid
Cycloserine • Seromycin
Dapsone • Dapsone
Erythromycin • Erythrocin, Pediamycin
Ethambutol • Myambutol
Ethionamide • Trecator-SC
Gentamicin • Garamycin
Isoniazid • Hyzyd, Nydrazid
Lithium • Eskalith, Lithobid
Metronidazole • Flagyl
Minocycline • Dynacin, Solodyn
Norfloxacin • Noroxin
Ofloxacin • Floxin
Olanzapine • Zyprexa
Penicillin G procaine • Duracillin A-S, Pfizerpen
Sulfamethoxazole/trimethoprim • Bactrim, Septra

CASE Bipolar-like symptoms

Mr. R, age 48, presents to the psychiatric emergency department (ED) for the third time in 4 days after a change in his behavior over the last 2.5 weeks. He exhibits heightened extroversion, pressured speech, and uncharacteristic irritability. Mr. R’s wife reports that her husband normally is reserved.

Mr. R’s wife first became concerned when she noticed he was not sleeping and spending his nights changing the locks on their home. Mr. R, who is a business executive, occupied his time by taking notes on ways to protect his identity from the senior partners at his company.

Three weeks before his first ED visit, Mr. R had been treated for a neck abscess with incision and drainage. He was sent home with a 10-day course of amoxicillin/clavulanate, 875/125 mg by mouth twice daily. There were no reports of steroid use during or after the procedure. Four days after starting the antibiotic, he stopped taking it because he and his wife felt it was contributing to his mood changes and bizarre behavior.

During his first visit to the ED, Mr. R received a 1-time dose of olanzapine, 5 mg by mouth, which helped temporarily reduce his anxiety; however, he returned the following day with the same anxiety symptoms and was discharged with a 30-day prescription for olanzapine, 5 mg/d, to manage symptoms until he could establish care with an outpatient psychiatrist. Two days later, he returned to the ED yet again convinced people were spying on him and that his coworkers were plotting to have him fired. He was not taking his phone to work due to fears that it would be hacked.

Mr. R’s only home medication is clomiphene citrate, 100 mg/d by mouth, which he’s received for the past 7 months to treat low testosterone. He has no personal or family history of psychiatric illness and no prior signs of mania or hypomania.

At the current ED visit, Mr. R’s testosterone level is checked and is within normal limits. His urine drug screen, head CT, and standard laboratory test results are unremarkable, except for mild transaminitis that does not warrant acute management.

The clinicians in the ED establish a diagnosis of mania, unspecified, and psychotic disorder, unspecified. They recommend that Mr. R be admitted for mood stabilization.

[polldaddy:10485725]

Continue to: The authors' observations

Our initial impression was that Mr. R was experiencing a manic episode from undiagnosed bipolar I disorder. The diagnosis was equivocal considering his age, lack of family history, and absence of prior psychiatric symptoms. In most cases, the mean age of onset for mania is late adolescence to early adulthood. It would be less common for a patient to experience a first manic episode at age 48, although mania may emerge at any age. Results from a large British study showed that the incidence of a first manic episode drops from 13.81% in men age 16 to 25 to 2.62% in men age 46 to 55.¹ However, some estimates suggest that the prevalence of late-onset mania is much higher than previously expected; medical comorbidities, such as dementia and delirium, may play a significant role in posing as manic-type symptoms in these patients.²

In Mr. R’s case, he remained fully alert and oriented without waxing and waning attentional deficits, which made delirium less likely. His affective symptoms included a reduced need for sleep, anxiety, irritability, rapid speech, and grandiosity lasting at least 2 weeks. He also exhibited psychotic symptoms in the form of paranoia. Altogether, he fit diagnostic criteria for bipolar I disorder well.

At the time of his manic episode, Mr. R was taking clomiphene. Clomiphene-induced mania and psychosis has been reported scarcely in the literature.³ In these cases, behavioral changes occurred within the first month of clomiphene initiation, which is dissimilar from Mr. R’s timeline.⁴ However, there appeared to be a temporal relationship between Mr. R’s use of amoxicillin/clavulanate and his manic episode.

This led us to consider whether medication-induced bipolar disorder would be a more appropriate diagnosis. There are documented associations between mania and antibiotics⁵; however, to our knowledge, mania secondary specifically to amoxicillin/clavulanate has not been reported extensively in the American literature. We found 1 case of suspected amoxicillin-induced psychosis,⁶ as well as a case report from the Netherlands of possible amoxicillin/clavulanate-induced mania.⁷

EVALUATION Ongoing paranoia

During his psychiatric hospitalization, Mr. R remains cooperative and polite, but exhibits ongoing paranoia, pressured speech, and poor reality testing. He remains convinced that “people are out to get me,” and routinely scans the room for safety during daily evaluations. He reports that he feels safe in the hospital, but does not feel safe to leave. Mr. R does not recall if in the past he had taken any products containing amoxicillin, but he is able to appreciate changes in his mood after being prescribed the antibiotic. He reports that starting the antibiotic made him feel confident in social interactions.

Continue to: During Mr. R's psychiatric hospitalization...

During Mr. R’s psychiatric hospitalization, olanzapine is titrated to 10 mg at bedtime. Clomiphene citrate is discontinued to limit any potential precipitants of mania, and amoxicillin/clavulanate is not restarted.

Mr. R gradually shows improvement in sleep quality and duration and becomes less irritable. His speech returns to a regular rate and rhythm. He eventually begins to question whether his fears were reality-based. After 4 days, Mr. R is ready to be discharged home and return to work.

[polldaddy:10485726]

The authors’ observations

The term “antibiomania” is used to describe manic episodes that coincide with antibiotic usage.⁸ Clarithromycin and ciprofloxacin are the agents most frequently implicated in antibiomania.⁹ While numerous reports exist in the literature, antibiomania is still considered a rare or unusual adverse event.

The link between infections and neuropsychiatric symptoms is well documented, which makes it challenging to tease apart the role of the acute infection from the use of antibiotics in precipitating psychiatric symptoms. However, in most reported cases of antibiomania, the onset of manic symptoms typically occurs within the first week of antibiotic initiation and resolves 1 to 3 days after medication discontinuation. The temporal relationship between antibiotic initiation and onset of neuropsychiatric symptoms has been best highlighted in cases where clarithromycin is used to treat a chronic Helicobacter pylori infection.¹⁰

While reports of antibiomania date back more than 6 decades, the exact mechanism by which antibiotics cause psychiatric symptoms is mostly unknown, although there are several hypotheses.⁵ Many hypotheses suggest some antibiotics play a role in reducing gamma-aminobutyric acid (GABA) neurotransmission. Quinolones, for example, have been found to cross the blood–brain barrier and can inhibit GABA from binding to the receptor sites. This can result in hyper-excitability in the CNS. Several quinolones have been implicated in antibiomania (Table 1⁵). Penicillins are also thought to interfere with GABA neurotransmission in a similar fashion; however, amoxicillin-clavulanate has poor CNS penetration in the absence of blood–brain barrier disruption,¹¹ which makes this theory a less plausible explanation for Mr. R’s case.

Continue to: Another possible mechanism...

Another possible mechanism of antibiotic-induced CNS excitability is through the glutamatergic system. Cycloserine, an antitubercular agent, is an N-methyl-D-aspartate receptor (NMDA) partial agonist and has reported neuropsychiatric adverse effects.¹² It has been proposed that quinolones may also have NMDA agonist activity.

The prostaglandin hypothesis suggests that a decrease in GABA may increase concentrations of steroid hormones in the rat CNS.¹³ Steroids have been implicated in the breakdown of prostaglandin E1 (PGE1).¹³ A disruption in steroid regulation may prevent PGE1 breakdown. Lithium’s antimanic properties are thought to be caused at least in part by limiting prostaglandin production.¹⁴ Thus, a shift in PGE1 may lead to mood dysregulation.

Bipolar disorder has been linked with mitochondrial function abnormalities.¹⁵ Antibiotics that target ribosomal RNA may disrupt normal mitochondrial function and increase risk for mania precipitation.¹⁵ However, amoxicillin exerts its antibiotic effects through binding to penicillin-binding proteins, which leads to inhibition of the cell wall biosynthesis.

Lastly, research into the microbiome has elucidated the gut-brain axis. In animal studies, the microbiome has been found to play a role in immunity, cognitive function, and behavior. Dysbiosis in the microbiome is currently being investigated for its role in schizophrenia and bipolar disorder.¹⁶ Both the microbiome and changes in mitochondrial function are thought to develop over time, so while these are plausible explanations, an onset within 4 days of antibiotic initiation is likely too short of an exposure time to produce these changes.

The most likely causes of Mr. R’s manic episode were clomiphene or amoxicillin-clavulanate, and the time course seems to indicate the antibiotic was the most likely culprit. Table 2 lists things to consider if you suspect your patient may be experiencing antibiomania.

Continue to: TREATMENT Stable on olanzapine

TREATMENT Stable on olanzapine

During his first visit to the outpatient clinic 4 weeks after being discharged, Mr. R reports that he has successfully returned to work, and his paranoia has completely resolved. He continues to take olanzapine, 10 mg nightly, and has restarted clomiphene, 100 mg/d.

During this outpatient follow-up visit, Mr. R attributes his manic episode to an adverse reaction to amoxicillin/clavulanate, and requests to be tapered off olanzapine. After he and his psychiatrist discuss the risk of relapse in untreated bipolar disorder, olanzapine is reduced to 7.5 mg at bedtime with a plan to taper to discontinuation.

At his second follow-up visit 1 month later, Mr. R has also stopped clomiphene and is taking a herbal supplement instead, which he reports is helpful for his fatigue. He says his mood is stable and denies experiencing any manic or depressive symptoms. Olanzapine is discontinued at this visit.

[polldaddy:10485727]

OUTCOME Lasting euthymic mood

Mr. R agrees to our recommendation of continuing to monitor him every 3 months for at least 1 year. We provide him and his wife with education about early warning signs of mood instability. Eight months after his manic episode, Mr. R no longer receives any psychotropic medications and shows no signs of mood instability. His mood remains euthymic and he is able to function well at work and in his personal life.

Bottom Line

‘Antibiomania’ describes manic episodes that coincide with antibiotic usage. This adverse effect is rare but should be considered in patients who present with unexplained first-episode mania, particularly those with an initial onset of mania after early adulthood.

Continue to: Related Resources

• Rakofsky JJ, Dunlop BW. Nothing to sneeze at: Upper respiratory infections and mood disorders. Current Psychiatry. 2019;18(7):29-34.
• Adiba A, Jackson JC, Torrence CL. Older-age bipolar disorder: A case series. Current Psychiatry. 2019;18(2):24-29

Drug Brand Names

Amoxicillin • Amoxil
Amoxicillin/clavulanate • Augmentin
Ampicillin • Omnipen-N, Polycillin-N
Ciprofloxacin • Cipro
Clarithromycin • Biaxin
Clomiphene • Clomid
Cycloserine • Seromycin
Dapsone • Dapsone
Erythromycin • Erythrocin, Pediamycin
Ethambutol • Myambutol
Ethionamide • Trecator-SC
Gentamicin • Garamycin
Isoniazid • Hyzyd, Nydrazid
Lithium • Eskalith, Lithobid
Metronidazole • Flagyl
Minocycline • Dynacin, Solodyn
Norfloxacin • Noroxin
Ofloxacin • Floxin
Olanzapine • Zyprexa
Penicillin G procaine • Duracillin A-S, Pfizerpen
Sulfamethoxazole/trimethoprim • Bactrim, Septra

CASE Bipolar-like symptoms

Mr. R, age 48, presents to the psychiatric emergency department (ED) for the third time in 4 days after a change in his behavior over the last 2.5 weeks. He exhibits heightened extroversion, pressured speech, and uncharacteristic irritability. Mr. R’s wife reports that her husband normally is reserved.

Mr. R’s wife first became concerned when she noticed he was not sleeping and spending his nights changing the locks on their home. Mr. R, who is a business executive, occupied his time by taking notes on ways to protect his identity from the senior partners at his company.

Three weeks before his first ED visit, Mr. R had been treated for a neck abscess with incision and drainage. He was sent home with a 10-day course of amoxicillin/clavulanate, 875/125 mg by mouth twice daily. There were no reports of steroid use during or after the procedure. Four days after starting the antibiotic, he stopped taking it because he and his wife felt it was contributing to his mood changes and bizarre behavior.

During his first visit to the ED, Mr. R received a 1-time dose of olanzapine, 5 mg by mouth, which helped temporarily reduce his anxiety; however, he returned the following day with the same anxiety symptoms and was discharged with a 30-day prescription for olanzapine, 5 mg/d, to manage symptoms until he could establish care with an outpatient psychiatrist. Two days later, he returned to the ED yet again convinced people were spying on him and that his coworkers were plotting to have him fired. He was not taking his phone to work due to fears that it would be hacked.

Mr. R’s only home medication is clomiphene citrate, 100 mg/d by mouth, which he’s received for the past 7 months to treat low testosterone. He has no personal or family history of psychiatric illness and no prior signs of mania or hypomania.

At the current ED visit, Mr. R’s testosterone level is checked and is within normal limits. His urine drug screen, head CT, and standard laboratory test results are unremarkable, except for mild transaminitis that does not warrant acute management.

The clinicians in the ED establish a diagnosis of mania, unspecified, and psychotic disorder, unspecified. They recommend that Mr. R be admitted for mood stabilization.

[polldaddy:10485725]

Continue to: The authors' observations

Our initial impression was that Mr. R was experiencing a manic episode from undiagnosed bipolar I disorder. The diagnosis was equivocal considering his age, lack of family history, and absence of prior psychiatric symptoms. In most cases, the mean age of onset for mania is late adolescence to early adulthood. It would be less common for a patient to experience a first manic episode at age 48, although mania may emerge at any age. Results from a large British study showed that the incidence of a first manic episode drops from 13.81% in men age 16 to 25 to 2.62% in men age 46 to 55.¹ However, some estimates suggest that the prevalence of late-onset mania is much higher than previously expected; medical comorbidities, such as dementia and delirium, may play a significant role in posing as manic-type symptoms in these patients.²

In Mr. R’s case, he remained fully alert and oriented without waxing and waning attentional deficits, which made delirium less likely. His affective symptoms included a reduced need for sleep, anxiety, irritability, rapid speech, and grandiosity lasting at least 2 weeks. He also exhibited psychotic symptoms in the form of paranoia. Altogether, he fit diagnostic criteria for bipolar I disorder well.

At the time of his manic episode, Mr. R was taking clomiphene. Clomiphene-induced mania and psychosis has been reported scarcely in the literature.³ In these cases, behavioral changes occurred within the first month of clomiphene initiation, which is dissimilar from Mr. R’s timeline.⁴ However, there appeared to be a temporal relationship between Mr. R’s use of amoxicillin/clavulanate and his manic episode.

This led us to consider whether medication-induced bipolar disorder would be a more appropriate diagnosis. There are documented associations between mania and antibiotics⁵; however, to our knowledge, mania secondary specifically to amoxicillin/clavulanate has not been reported extensively in the American literature. We found 1 case of suspected amoxicillin-induced psychosis,⁶ as well as a case report from the Netherlands of possible amoxicillin/clavulanate-induced mania.⁷

EVALUATION Ongoing paranoia

During his psychiatric hospitalization, Mr. R remains cooperative and polite, but exhibits ongoing paranoia, pressured speech, and poor reality testing. He remains convinced that “people are out to get me,” and routinely scans the room for safety during daily evaluations. He reports that he feels safe in the hospital, but does not feel safe to leave. Mr. R does not recall if in the past he had taken any products containing amoxicillin, but he is able to appreciate changes in his mood after being prescribed the antibiotic. He reports that starting the antibiotic made him feel confident in social interactions.

Continue to: During Mr. R's psychiatric hospitalization...

During Mr. R’s psychiatric hospitalization, olanzapine is titrated to 10 mg at bedtime. Clomiphene citrate is discontinued to limit any potential precipitants of mania, and amoxicillin/clavulanate is not restarted.

Mr. R gradually shows improvement in sleep quality and duration and becomes less irritable. His speech returns to a regular rate and rhythm. He eventually begins to question whether his fears were reality-based. After 4 days, Mr. R is ready to be discharged home and return to work.

[polldaddy:10485726]

The authors’ observations

The term “antibiomania” is used to describe manic episodes that coincide with antibiotic usage.⁸ Clarithromycin and ciprofloxacin are the agents most frequently implicated in antibiomania.⁹ While numerous reports exist in the literature, antibiomania is still considered a rare or unusual adverse event.

The link between infections and neuropsychiatric symptoms is well documented, which makes it challenging to tease apart the role of the acute infection from the use of antibiotics in precipitating psychiatric symptoms. However, in most reported cases of antibiomania, the onset of manic symptoms typically occurs within the first week of antibiotic initiation and resolves 1 to 3 days after medication discontinuation. The temporal relationship between antibiotic initiation and onset of neuropsychiatric symptoms has been best highlighted in cases where clarithromycin is used to treat a chronic Helicobacter pylori infection.¹⁰

While reports of antibiomania date back more than 6 decades, the exact mechanism by which antibiotics cause psychiatric symptoms is mostly unknown, although there are several hypotheses.⁵ Many hypotheses suggest some antibiotics play a role in reducing gamma-aminobutyric acid (GABA) neurotransmission. Quinolones, for example, have been found to cross the blood–brain barrier and can inhibit GABA from binding to the receptor sites. This can result in hyper-excitability in the CNS. Several quinolones have been implicated in antibiomania (Table 1⁵). Penicillins are also thought to interfere with GABA neurotransmission in a similar fashion; however, amoxicillin-clavulanate has poor CNS penetration in the absence of blood–brain barrier disruption,¹¹ which makes this theory a less plausible explanation for Mr. R’s case.

Continue to: Another possible mechanism...

Another possible mechanism of antibiotic-induced CNS excitability is through the glutamatergic system. Cycloserine, an antitubercular agent, is an N-methyl-D-aspartate receptor (NMDA) partial agonist and has reported neuropsychiatric adverse effects.¹² It has been proposed that quinolones may also have NMDA agonist activity.

The prostaglandin hypothesis suggests that a decrease in GABA may increase concentrations of steroid hormones in the rat CNS.¹³ Steroids have been implicated in the breakdown of prostaglandin E1 (PGE1).¹³ A disruption in steroid regulation may prevent PGE1 breakdown. Lithium’s antimanic properties are thought to be caused at least in part by limiting prostaglandin production.¹⁴ Thus, a shift in PGE1 may lead to mood dysregulation.

Bipolar disorder has been linked with mitochondrial function abnormalities.¹⁵ Antibiotics that target ribosomal RNA may disrupt normal mitochondrial function and increase risk for mania precipitation.¹⁵ However, amoxicillin exerts its antibiotic effects through binding to penicillin-binding proteins, which leads to inhibition of the cell wall biosynthesis.

Lastly, research into the microbiome has elucidated the gut-brain axis. In animal studies, the microbiome has been found to play a role in immunity, cognitive function, and behavior. Dysbiosis in the microbiome is currently being investigated for its role in schizophrenia and bipolar disorder.¹⁶ Both the microbiome and changes in mitochondrial function are thought to develop over time, so while these are plausible explanations, an onset within 4 days of antibiotic initiation is likely too short of an exposure time to produce these changes.

The most likely causes of Mr. R’s manic episode were clomiphene or amoxicillin-clavulanate, and the time course seems to indicate the antibiotic was the most likely culprit. Table 2 lists things to consider if you suspect your patient may be experiencing antibiomania.

Continue to: TREATMENT Stable on olanzapine

TREATMENT Stable on olanzapine

During his first visit to the outpatient clinic 4 weeks after being discharged, Mr. R reports that he has successfully returned to work, and his paranoia has completely resolved. He continues to take olanzapine, 10 mg nightly, and has restarted clomiphene, 100 mg/d.

During this outpatient follow-up visit, Mr. R attributes his manic episode to an adverse reaction to amoxicillin/clavulanate, and requests to be tapered off olanzapine. After he and his psychiatrist discuss the risk of relapse in untreated bipolar disorder, olanzapine is reduced to 7.5 mg at bedtime with a plan to taper to discontinuation.

At his second follow-up visit 1 month later, Mr. R has also stopped clomiphene and is taking a herbal supplement instead, which he reports is helpful for his fatigue. He says his mood is stable and denies experiencing any manic or depressive symptoms. Olanzapine is discontinued at this visit.

[polldaddy:10485727]

OUTCOME Lasting euthymic mood

Mr. R agrees to our recommendation of continuing to monitor him every 3 months for at least 1 year. We provide him and his wife with education about early warning signs of mood instability. Eight months after his manic episode, Mr. R no longer receives any psychotropic medications and shows no signs of mood instability. His mood remains euthymic and he is able to function well at work and in his personal life.

Bottom Line

‘Antibiomania’ describes manic episodes that coincide with antibiotic usage. This adverse effect is rare but should be considered in patients who present with unexplained first-episode mania, particularly those with an initial onset of mania after early adulthood.

Continue to: Related Resources

• Rakofsky JJ, Dunlop BW. Nothing to sneeze at: Upper respiratory infections and mood disorders. Current Psychiatry. 2019;18(7):29-34.
• Adiba A, Jackson JC, Torrence CL. Older-age bipolar disorder: A case series. Current Psychiatry. 2019;18(2):24-29

Drug Brand Names

Amoxicillin • Amoxil
Amoxicillin/clavulanate • Augmentin
Ampicillin • Omnipen-N, Polycillin-N
Ciprofloxacin • Cipro
Clarithromycin • Biaxin
Clomiphene • Clomid
Cycloserine • Seromycin
Dapsone • Dapsone
Erythromycin • Erythrocin, Pediamycin
Ethambutol • Myambutol
Ethionamide • Trecator-SC
Gentamicin • Garamycin
Isoniazid • Hyzyd, Nydrazid
Lithium • Eskalith, Lithobid
Metronidazole • Flagyl
Minocycline • Dynacin, Solodyn
Norfloxacin • Noroxin
Ofloxacin • Floxin
Olanzapine • Zyprexa
Penicillin G procaine • Duracillin A-S, Pfizerpen
Sulfamethoxazole/trimethoprim • Bactrim, Septra

Mrs. C, age 75, is transferred to our inpatient medical/surgical hospital from a psychiatric hospital after presenting with shortness of breath and altered mental status.

Eight days earlier, Mrs. C had been admitted to the psychiatric hospital for bipolar mania with psychotic features. While there, Mrs. C received quetiapine, 400 mg nightly, and an initial valproic acid (VPA) dosage of 500 mg 2 times daily. While receiving VPA 500 mg 2 times daily, her VPA total level was 62 µg/mL, which is on the lower end of the therapeutic range (50 to 125 µg/mL). This prompted the team at the psychiatric hospital to increase her VPA dosage to 500 mg 3 times daily the day before she was transferred to our hospital.

At our hospital, she is found to be in hypoxic respiratory failure secondary to pneumonia. Upon admission, her laboratory data show evidence of infection and anemia and she also has an albumin level of 3.0 g/dL (normal range: 3.5 to 5.5 g/dL). All other laboratory values, including liver enzymes, are unremarkable. She is started on IV levofloxacin. Her previous medications—quetiapine and VPA—are continued at their same dosages and frequencies from her inpatient psychiatric stay.

From hospital Day 3 to Day 6, Mrs. C experiences gradual improvement in her respiratory and mental status. However, on hospital Day 7, she has extreme somnolence and altered mental status without respiratory involvement. Our team suspects VPA toxicity and/or VPA-induced hyperammonemic encephalopathy (VHE).

VPA-induced hyperammonemia

Hyperammonemia can occur in individuals receiving VPA and is most often asymptomatic. However, elevations in ammonia may lead to VHE, which is a rare but serious adverse effect. VHE has been reported early in treatment, in acute VPA overdose, and in chronic VPA use despite normal doses and levels.¹ It also can occur in the absence of clinical and laboratory evidence of hepatotoxicity. VHE is associated with significant morbidity and CNS damage. Symptoms of VHE include vomiting, lethargy, and confusion. If left untreated, VHE can lead to coma and death.

Mechanism of VHE. The exact mechanism of VHE is unknown.^1-3 Ammonia is a toxic base produced by deamination of amino acids. The liver eliminates ammonia via the urea cycle.² Valproic acid metabolites, propionate and 4-en-VPA, can directly inhibit N-acetyl glutamate, which can disrupt the urea cycle, leading to elevated ammonia levels.³ Long-term or high-dose VPA can lead to carnitine deficiency, primarily by inhibiting its biosynthesis and depleting stores.⁴ Carnitine deficiency leads to disturbances in mitochondrial function, causing inhibition of the urea cycle and increasing ammonia. CNS toxicity due to hyperammonemia is thought to be due to activation of glutamate receptors.³

Risk factors. Co-administration of other antiepileptic drugs (AEDs) with VPA is a risk factor for VHE.^1,5 This happens because enzyme-inducing AEDs such as phenytoin, phenobarbital, and carba­mazepine can increase toxic metabolites of VPA, which can lead to hyperammonemia. Topiramate can also inhibit the urea cycle, leading to increased ammonia levels. Additionally, co-administration of VPA with quetiapine, paliperidone, risperidone, or aripiprazole has been reported to increase the risk of VHE.^1,5 Intellectual disability, carnitine deficiency, low albumin, and abnormal liver function have also been reported to increase the risk of VHE.^1,5

Continue to: Diagnosis and management

Diagnosis and management. If a patient receiving VPA is experiencing nausea, fatigue, or somnolence, it is important to check the patient’s ammonia level (normal range: 11 to 32 µmol/L) and VPA total levels (therapeutic range: 50 to 125 µg/mL). Consider checking a VPA free level, especially in geriatric patients or patients who have low albumin; the therapeutic range of VPA free is  6 to 22 µg/mL.³ If the ammonia level is elevated, discontinue VPA immediately (Table).^1-3 Clinicians may also elect to prescribe lactulose until ammonia levels return to normal range. Adding levocarnitine may also help, although evidence is limited to small case series or retrospective studies.³ Currently, there is no known advantage in combining lactulose and levocarnitine to address VHE. Severe cases of VHE (ammonia levels >400 µmol/L) may require hemodialysis.¹

Prevention. Strategies to prevent VHE include avoiding polypharmacy, especially concurrent use of enzyme-inducing AEDs and possibly second-generation antipsychotics. Additionally, VPA should not be used in individuals with urea cycle disorders. It is unknown if levocarnitine supplementation is preventive, but this approach has been suggested.³

CASE CONTINUED

Mrs. C has several possible risk factors for VHE, including co-administration of quetiapine and VPA, and a low albumin level. A further laboratory workup for Mrs. C reveals a VPA free level of 19 µg/mL (21.1% free), a VPA total level of 90 µg/mL, and an ammonia level of 79 µmol/L, confirming our suspicions regarding VHE. We determine that Mrs. C’s altered mental status is likely due her elevated ammonia levels, because the infection had been improving in the days leading up to the sudden, extreme somnolence.

VPA is immediately stopped and Mrs. C receives 1 dose of lactulose. The following day, Mrs. C’s mental status improves, and her ammonia levels return to normal. On hospital Day 9, she is transferred back to the psychiatric facility for management of manic and psychotic symptoms.

Related Resources

• Brown LM, Cupples N, Moore TA. Levocarnitine for valproate-induced hyperammonemia in the psychiatric setting: a case series and literature review. Ment Health Clin. 2018;8(3):148-154.
• Aires CCP, van Cruchten A, Ijlat L, et al. New insights on the mechanisms of valproate-induced hyperammonemia: inhibition of hepatic N-acetylglutamate synthase activity by valproyl-CoA. J Hepatol. 2011;55(2):426-434.

Drug Brand Names

Aripiprazole • Abilify
Carbamazepine • Tegretol
Lactulose • Enulose
Levocarnitine • Carnitine, Carnitor
Levofloxacin • Levaquin IV
Paliperidone • Invega
Phenobarbital • Luminal
Phenytoin • Dilantin
Quetiapine • Seroquel
Risperidone • Risperdal
Topiramate • Topamax
Valproic acid • Depakene

Mrs. C, age 75, is transferred to our inpatient medical/surgical hospital from a psychiatric hospital after presenting with shortness of breath and altered mental status.

Eight days earlier, Mrs. C had been admitted to the psychiatric hospital for bipolar mania with psychotic features. While there, Mrs. C received quetiapine, 400 mg nightly, and an initial valproic acid (VPA) dosage of 500 mg 2 times daily. While receiving VPA 500 mg 2 times daily, her VPA total level was 62 µg/mL, which is on the lower end of the therapeutic range (50 to 125 µg/mL). This prompted the team at the psychiatric hospital to increase her VPA dosage to 500 mg 3 times daily the day before she was transferred to our hospital.

At our hospital, she is found to be in hypoxic respiratory failure secondary to pneumonia. Upon admission, her laboratory data show evidence of infection and anemia and she also has an albumin level of 3.0 g/dL (normal range: 3.5 to 5.5 g/dL). All other laboratory values, including liver enzymes, are unremarkable. She is started on IV levofloxacin. Her previous medications—quetiapine and VPA—are continued at their same dosages and frequencies from her inpatient psychiatric stay.

From hospital Day 3 to Day 6, Mrs. C experiences gradual improvement in her respiratory and mental status. However, on hospital Day 7, she has extreme somnolence and altered mental status without respiratory involvement. Our team suspects VPA toxicity and/or VPA-induced hyperammonemic encephalopathy (VHE).

VPA-induced hyperammonemia

Hyperammonemia can occur in individuals receiving VPA and is most often asymptomatic. However, elevations in ammonia may lead to VHE, which is a rare but serious adverse effect. VHE has been reported early in treatment, in acute VPA overdose, and in chronic VPA use despite normal doses and levels.¹ It also can occur in the absence of clinical and laboratory evidence of hepatotoxicity. VHE is associated with significant morbidity and CNS damage. Symptoms of VHE include vomiting, lethargy, and confusion. If left untreated, VHE can lead to coma and death.

Mechanism of VHE. The exact mechanism of VHE is unknown.^1-3 Ammonia is a toxic base produced by deamination of amino acids. The liver eliminates ammonia via the urea cycle.² Valproic acid metabolites, propionate and 4-en-VPA, can directly inhibit N-acetyl glutamate, which can disrupt the urea cycle, leading to elevated ammonia levels.³ Long-term or high-dose VPA can lead to carnitine deficiency, primarily by inhibiting its biosynthesis and depleting stores.⁴ Carnitine deficiency leads to disturbances in mitochondrial function, causing inhibition of the urea cycle and increasing ammonia. CNS toxicity due to hyperammonemia is thought to be due to activation of glutamate receptors.³

Risk factors. Co-administration of other antiepileptic drugs (AEDs) with VPA is a risk factor for VHE.^1,5 This happens because enzyme-inducing AEDs such as phenytoin, phenobarbital, and carba­mazepine can increase toxic metabolites of VPA, which can lead to hyperammonemia. Topiramate can also inhibit the urea cycle, leading to increased ammonia levels. Additionally, co-administration of VPA with quetiapine, paliperidone, risperidone, or aripiprazole has been reported to increase the risk of VHE.^1,5 Intellectual disability, carnitine deficiency, low albumin, and abnormal liver function have also been reported to increase the risk of VHE.^1,5

Continue to: Diagnosis and management

Diagnosis and management. If a patient receiving VPA is experiencing nausea, fatigue, or somnolence, it is important to check the patient’s ammonia level (normal range: 11 to 32 µmol/L) and VPA total levels (therapeutic range: 50 to 125 µg/mL). Consider checking a VPA free level, especially in geriatric patients or patients who have low albumin; the therapeutic range of VPA free is  6 to 22 µg/mL.³ If the ammonia level is elevated, discontinue VPA immediately (Table).^1-3 Clinicians may also elect to prescribe lactulose until ammonia levels return to normal range. Adding levocarnitine may also help, although evidence is limited to small case series or retrospective studies.³ Currently, there is no known advantage in combining lactulose and levocarnitine to address VHE. Severe cases of VHE (ammonia levels >400 µmol/L) may require hemodialysis.¹

Prevention. Strategies to prevent VHE include avoiding polypharmacy, especially concurrent use of enzyme-inducing AEDs and possibly second-generation antipsychotics. Additionally, VPA should not be used in individuals with urea cycle disorders. It is unknown if levocarnitine supplementation is preventive, but this approach has been suggested.³

CASE CONTINUED

Mrs. C has several possible risk factors for VHE, including co-administration of quetiapine and VPA, and a low albumin level. A further laboratory workup for Mrs. C reveals a VPA free level of 19 µg/mL (21.1% free), a VPA total level of 90 µg/mL, and an ammonia level of 79 µmol/L, confirming our suspicions regarding VHE. We determine that Mrs. C’s altered mental status is likely due her elevated ammonia levels, because the infection had been improving in the days leading up to the sudden, extreme somnolence.

VPA is immediately stopped and Mrs. C receives 1 dose of lactulose. The following day, Mrs. C’s mental status improves, and her ammonia levels return to normal. On hospital Day 9, she is transferred back to the psychiatric facility for management of manic and psychotic symptoms.

Related Resources

• Brown LM, Cupples N, Moore TA. Levocarnitine for valproate-induced hyperammonemia in the psychiatric setting: a case series and literature review. Ment Health Clin. 2018;8(3):148-154.
• Aires CCP, van Cruchten A, Ijlat L, et al. New insights on the mechanisms of valproate-induced hyperammonemia: inhibition of hepatic N-acetylglutamate synthase activity by valproyl-CoA. J Hepatol. 2011;55(2):426-434.

Drug Brand Names

Aripiprazole • Abilify
Carbamazepine • Tegretol
Lactulose • Enulose
Levocarnitine • Carnitine, Carnitor
Levofloxacin • Levaquin IV
Paliperidone • Invega
Phenobarbital • Luminal
Phenytoin • Dilantin
Quetiapine • Seroquel
Risperidone • Risperdal
Topiramate • Topamax
Valproic acid • Depakene

Mrs. C, age 75, is transferred to our inpatient medical/surgical hospital from a psychiatric hospital after presenting with shortness of breath and altered mental status.

Eight days earlier, Mrs. C had been admitted to the psychiatric hospital for bipolar mania with psychotic features. While there, Mrs. C received quetiapine, 400 mg nightly, and an initial valproic acid (VPA) dosage of 500 mg 2 times daily. While receiving VPA 500 mg 2 times daily, her VPA total level was 62 µg/mL, which is on the lower end of the therapeutic range (50 to 125 µg/mL). This prompted the team at the psychiatric hospital to increase her VPA dosage to 500 mg 3 times daily the day before she was transferred to our hospital.

At our hospital, she is found to be in hypoxic respiratory failure secondary to pneumonia. Upon admission, her laboratory data show evidence of infection and anemia and she also has an albumin level of 3.0 g/dL (normal range: 3.5 to 5.5 g/dL). All other laboratory values, including liver enzymes, are unremarkable. She is started on IV levofloxacin. Her previous medications—quetiapine and VPA—are continued at their same dosages and frequencies from her inpatient psychiatric stay.

From hospital Day 3 to Day 6, Mrs. C experiences gradual improvement in her respiratory and mental status. However, on hospital Day 7, she has extreme somnolence and altered mental status without respiratory involvement. Our team suspects VPA toxicity and/or VPA-induced hyperammonemic encephalopathy (VHE).

VPA-induced hyperammonemia

Hyperammonemia can occur in individuals receiving VPA and is most often asymptomatic. However, elevations in ammonia may lead to VHE, which is a rare but serious adverse effect. VHE has been reported early in treatment, in acute VPA overdose, and in chronic VPA use despite normal doses and levels.¹ It also can occur in the absence of clinical and laboratory evidence of hepatotoxicity. VHE is associated with significant morbidity and CNS damage. Symptoms of VHE include vomiting, lethargy, and confusion. If left untreated, VHE can lead to coma and death.

Mechanism of VHE. The exact mechanism of VHE is unknown.^1-3 Ammonia is a toxic base produced by deamination of amino acids. The liver eliminates ammonia via the urea cycle.² Valproic acid metabolites, propionate and 4-en-VPA, can directly inhibit N-acetyl glutamate, which can disrupt the urea cycle, leading to elevated ammonia levels.³ Long-term or high-dose VPA can lead to carnitine deficiency, primarily by inhibiting its biosynthesis and depleting stores.⁴ Carnitine deficiency leads to disturbances in mitochondrial function, causing inhibition of the urea cycle and increasing ammonia. CNS toxicity due to hyperammonemia is thought to be due to activation of glutamate receptors.³

Risk factors. Co-administration of other antiepileptic drugs (AEDs) with VPA is a risk factor for VHE.^1,5 This happens because enzyme-inducing AEDs such as phenytoin, phenobarbital, and carba­mazepine can increase toxic metabolites of VPA, which can lead to hyperammonemia. Topiramate can also inhibit the urea cycle, leading to increased ammonia levels. Additionally, co-administration of VPA with quetiapine, paliperidone, risperidone, or aripiprazole has been reported to increase the risk of VHE.^1,5 Intellectual disability, carnitine deficiency, low albumin, and abnormal liver function have also been reported to increase the risk of VHE.^1,5

Continue to: Diagnosis and management

Diagnosis and management. If a patient receiving VPA is experiencing nausea, fatigue, or somnolence, it is important to check the patient’s ammonia level (normal range: 11 to 32 µmol/L) and VPA total levels (therapeutic range: 50 to 125 µg/mL). Consider checking a VPA free level, especially in geriatric patients or patients who have low albumin; the therapeutic range of VPA free is  6 to 22 µg/mL.³ If the ammonia level is elevated, discontinue VPA immediately (Table).^1-3 Clinicians may also elect to prescribe lactulose until ammonia levels return to normal range. Adding levocarnitine may also help, although evidence is limited to small case series or retrospective studies.³ Currently, there is no known advantage in combining lactulose and levocarnitine to address VHE. Severe cases of VHE (ammonia levels >400 µmol/L) may require hemodialysis.¹

Prevention. Strategies to prevent VHE include avoiding polypharmacy, especially concurrent use of enzyme-inducing AEDs and possibly second-generation antipsychotics. Additionally, VPA should not be used in individuals with urea cycle disorders. It is unknown if levocarnitine supplementation is preventive, but this approach has been suggested.³

CASE CONTINUED

Mrs. C has several possible risk factors for VHE, including co-administration of quetiapine and VPA, and a low albumin level. A further laboratory workup for Mrs. C reveals a VPA free level of 19 µg/mL (21.1% free), a VPA total level of 90 µg/mL, and an ammonia level of 79 µmol/L, confirming our suspicions regarding VHE. We determine that Mrs. C’s altered mental status is likely due her elevated ammonia levels, because the infection had been improving in the days leading up to the sudden, extreme somnolence.

VPA is immediately stopped and Mrs. C receives 1 dose of lactulose. The following day, Mrs. C’s mental status improves, and her ammonia levels return to normal. On hospital Day 9, she is transferred back to the psychiatric facility for management of manic and psychotic symptoms.

Related Resources

• Brown LM, Cupples N, Moore TA. Levocarnitine for valproate-induced hyperammonemia in the psychiatric setting: a case series and literature review. Ment Health Clin. 2018;8(3):148-154.
• Aires CCP, van Cruchten A, Ijlat L, et al. New insights on the mechanisms of valproate-induced hyperammonemia: inhibition of hepatic N-acetylglutamate synthase activity by valproyl-CoA. J Hepatol. 2011;55(2):426-434.

Drug Brand Names

Aripiprazole • Abilify
Carbamazepine • Tegretol
Lactulose • Enulose
Levocarnitine • Carnitine, Carnitor
Levofloxacin • Levaquin IV
Paliperidone • Invega
Phenobarbital • Luminal
Phenytoin • Dilantin
Quetiapine • Seroquel
Risperidone • Risperdal
Topiramate • Topamax
Valproic acid • Depakene

Psychiatric inpatients, particularly those with schizophrenia or bipolar disorder, have both a greater risk of having a secondary diagnosis of tardive dyskinesia and having worse illness when tardive dyskinesia is also present, according to results of a case-control study of more than 77,000 inpatients.

For the study, the investigators conducted an analysis of 77,022 adults from the Nationwide Inpatient Sample who had been admitted between January 2010 and December 2014 for mood disorders and schizophrenia; 38,382 patients in this group also had a secondary diagnosis of tardive dyskinesia (TD), reported Rikinkumar S. Patel, MD, of the department of psychiatry at Griffin Memorial Hospital in Norman, Okla., and associates. The study was published in Heliyon.

They investigators found that patients with schizophrenia and bipolar disorder were four to five times more likely to also have TD, and patients with TD were six times more likely to have severe morbidity because of a major loss of function. Compared with non-TD controls, patients with TD had a longer hospital length of stay by 6.36 days and higher cost by $20,415.

More than 60% of TD patients came from below the 50th percentile in median household income, compared with less than 40% of the non-TD group. Comorbidity-related risk factors for TD include diabetes (odds ratio, 1.542), hypertension (OR, 1.776), obesity (OR, 1.613), and tobacco (OR, 1.967) and drug abuse (OR, 1.507). Dr. Patel and associates also found that almost half of the patients with TD were aged 40-60 years and that the prevalence of TD in the study population increased with age.

“Our findings support the previous evidence that advanced age is a risk factor for the development of TD,” they wrote, citing research by Criscely L. Go, MD, and associates (Parkinsonism Relat Disord. 2019. 15[9]:655-9).

Dr. Patel and associates concluded that more systematic research is needed to prevent TD and “optimize inpatient outcomes in psychiatric patients with TD.”

The study authors reported having no conflicts of interest.

[email protected]

SOURCE: Patel RS et al. Heliyon. 2019. doi: 10.1016/j.heliyon.2019.e01745.

Psychiatric inpatients, particularly those with schizophrenia or bipolar disorder, have both a greater risk of having a secondary diagnosis of tardive dyskinesia and having worse illness when tardive dyskinesia is also present, according to results of a case-control study of more than 77,000 inpatients.

For the study, the investigators conducted an analysis of 77,022 adults from the Nationwide Inpatient Sample who had been admitted between January 2010 and December 2014 for mood disorders and schizophrenia; 38,382 patients in this group also had a secondary diagnosis of tardive dyskinesia (TD), reported Rikinkumar S. Patel, MD, of the department of psychiatry at Griffin Memorial Hospital in Norman, Okla., and associates. The study was published in Heliyon.

They investigators found that patients with schizophrenia and bipolar disorder were four to five times more likely to also have TD, and patients with TD were six times more likely to have severe morbidity because of a major loss of function. Compared with non-TD controls, patients with TD had a longer hospital length of stay by 6.36 days and higher cost by $20,415.

More than 60% of TD patients came from below the 50th percentile in median household income, compared with less than 40% of the non-TD group. Comorbidity-related risk factors for TD include diabetes (odds ratio, 1.542), hypertension (OR, 1.776), obesity (OR, 1.613), and tobacco (OR, 1.967) and drug abuse (OR, 1.507). Dr. Patel and associates also found that almost half of the patients with TD were aged 40-60 years and that the prevalence of TD in the study population increased with age.

“Our findings support the previous evidence that advanced age is a risk factor for the development of TD,” they wrote, citing research by Criscely L. Go, MD, and associates (Parkinsonism Relat Disord. 2019. 15[9]:655-9).

Dr. Patel and associates concluded that more systematic research is needed to prevent TD and “optimize inpatient outcomes in psychiatric patients with TD.”

The study authors reported having no conflicts of interest.

[email protected]

SOURCE: Patel RS et al. Heliyon. 2019. doi: 10.1016/j.heliyon.2019.e01745.

Psychiatric inpatients, particularly those with schizophrenia or bipolar disorder, have both a greater risk of having a secondary diagnosis of tardive dyskinesia and having worse illness when tardive dyskinesia is also present, according to results of a case-control study of more than 77,000 inpatients.

For the study, the investigators conducted an analysis of 77,022 adults from the Nationwide Inpatient Sample who had been admitted between January 2010 and December 2014 for mood disorders and schizophrenia; 38,382 patients in this group also had a secondary diagnosis of tardive dyskinesia (TD), reported Rikinkumar S. Patel, MD, of the department of psychiatry at Griffin Memorial Hospital in Norman, Okla., and associates. The study was published in Heliyon.

They investigators found that patients with schizophrenia and bipolar disorder were four to five times more likely to also have TD, and patients with TD were six times more likely to have severe morbidity because of a major loss of function. Compared with non-TD controls, patients with TD had a longer hospital length of stay by 6.36 days and higher cost by $20,415.

More than 60% of TD patients came from below the 50th percentile in median household income, compared with less than 40% of the non-TD group. Comorbidity-related risk factors for TD include diabetes (odds ratio, 1.542), hypertension (OR, 1.776), obesity (OR, 1.613), and tobacco (OR, 1.967) and drug abuse (OR, 1.507). Dr. Patel and associates also found that almost half of the patients with TD were aged 40-60 years and that the prevalence of TD in the study population increased with age.

“Our findings support the previous evidence that advanced age is a risk factor for the development of TD,” they wrote, citing research by Criscely L. Go, MD, and associates (Parkinsonism Relat Disord. 2019. 15[9]:655-9).

Dr. Patel and associates concluded that more systematic research is needed to prevent TD and “optimize inpatient outcomes in psychiatric patients with TD.”

The study authors reported having no conflicts of interest.

[email protected]

SOURCE: Patel RS et al. Heliyon. 2019. doi: 10.1016/j.heliyon.2019.e01745.

Patients with bipolar disorder show altered gaze processing on EEG recordings taken during working memory exercises, new study results suggest.

The study, led by Cristina Berchio of the department of basic neurosciences at the University of Geneva, recruited 19 euthymic patients with bipolar I or II from the Mood Disorders Unit at the University Hospital of Geneva and 19 controls matched for age, gender, education level, and handedness. While undergoing high-density EEG recording, participants performed a two-back working memory exercise that involved neutral faces with either direct or averted gazes. The study was published in NeuroImage: Clinical.

The investigators found reduced amplitude in a window of time (known as P200) associated with sensitivity to negative stimuli and attentional control; both of those functions are thought to be impaired in patients with bipolar disorder. They suggested that this might reflect early-life dysfunctional parental-infant gaze experiences that could affect how those patients with bipolar disorder learned emotion-regulation strategies. “In this sense, our early gaze experiences might also be considered an environmental risk factor, that might remain as a vulnerability trait in [bipolar patients],” they wrote.

Limitations of the study include the working memory exercise’s design, which could have led to misleading anticipatory effects. The small sample size is another limitation that affected the ability to perform certain analyses. The surface nature of EEG also limited evaluation of deeper brain structures that might have proved salient to this exercise.

The study was supported by several entities, including the Swiss National Center of Competence in Research. The authors declared no conflicts of interest.

[email protected]

SOURCE: Berchio C et al. NeuroImage Clin. 2019. doi: 10.1016/j.nicl.2017.09.006.

Patients with bipolar disorder show altered gaze processing on EEG recordings taken during working memory exercises, new study results suggest.

The study, led by Cristina Berchio of the department of basic neurosciences at the University of Geneva, recruited 19 euthymic patients with bipolar I or II from the Mood Disorders Unit at the University Hospital of Geneva and 19 controls matched for age, gender, education level, and handedness. While undergoing high-density EEG recording, participants performed a two-back working memory exercise that involved neutral faces with either direct or averted gazes. The study was published in NeuroImage: Clinical.

The investigators found reduced amplitude in a window of time (known as P200) associated with sensitivity to negative stimuli and attentional control; both of those functions are thought to be impaired in patients with bipolar disorder. They suggested that this might reflect early-life dysfunctional parental-infant gaze experiences that could affect how those patients with bipolar disorder learned emotion-regulation strategies. “In this sense, our early gaze experiences might also be considered an environmental risk factor, that might remain as a vulnerability trait in [bipolar patients],” they wrote.

Limitations of the study include the working memory exercise’s design, which could have led to misleading anticipatory effects. The small sample size is another limitation that affected the ability to perform certain analyses. The surface nature of EEG also limited evaluation of deeper brain structures that might have proved salient to this exercise.

The study was supported by several entities, including the Swiss National Center of Competence in Research. The authors declared no conflicts of interest.

[email protected]

SOURCE: Berchio C et al. NeuroImage Clin. 2019. doi: 10.1016/j.nicl.2017.09.006.

Patients with bipolar disorder show altered gaze processing on EEG recordings taken during working memory exercises, new study results suggest.

The study, led by Cristina Berchio of the department of basic neurosciences at the University of Geneva, recruited 19 euthymic patients with bipolar I or II from the Mood Disorders Unit at the University Hospital of Geneva and 19 controls matched for age, gender, education level, and handedness. While undergoing high-density EEG recording, participants performed a two-back working memory exercise that involved neutral faces with either direct or averted gazes. The study was published in NeuroImage: Clinical.

The investigators found reduced amplitude in a window of time (known as P200) associated with sensitivity to negative stimuli and attentional control; both of those functions are thought to be impaired in patients with bipolar disorder. They suggested that this might reflect early-life dysfunctional parental-infant gaze experiences that could affect how those patients with bipolar disorder learned emotion-regulation strategies. “In this sense, our early gaze experiences might also be considered an environmental risk factor, that might remain as a vulnerability trait in [bipolar patients],” they wrote.

Limitations of the study include the working memory exercise’s design, which could have led to misleading anticipatory effects. The small sample size is another limitation that affected the ability to perform certain analyses. The surface nature of EEG also limited evaluation of deeper brain structures that might have proved salient to this exercise.

The study was supported by several entities, including the Swiss National Center of Competence in Research. The authors declared no conflicts of interest.

[email protected]

SOURCE: Berchio C et al. NeuroImage Clin. 2019. doi: 10.1016/j.nicl.2017.09.006.

Several potential biomarkers may indicate whether patients with bipolar disorder may have high-recurrence disease with a cycle length that progressively shortens, according to Erik Smedler, MD, PhD, of the department of psychiatry and neurochemistry at Gothenburg (Sweden) University.

For the analysis, published in European Neuropsychopharmacology, Dr. Smedler and fellow investigators recruited 3,074 patients from the Swedish Bipolar Collection between 2009 and 2013 who had at least two inpatient episodes separated by at least 8 weeks. A total of 745 patients had serum samples available; assays for 203 different protein biomarkers were performed on those samples.

The investigators clustered patients according to frequency – with low-frequency recurrence defined as a maximum of one inpatient episode per year – and by cycle length – with sensitized patients having progressively shorter periods between inpatient episodes. No difference in biomarkers or clinical features were seen between high- and low-frequency recurrence patients, but sensitized patients were significantly more ill and were more likely to be treated with antidepressants.

In addition, in a specific cohort of patients who were both sensitized and had a high recurrence rate (at least five inpatient episodes), four proteins were expressed at a significantly lower level than that of nonsensitized patients: tumor necrosis factor receptor-2, tumor necrosis factor receptor superfamily member 4, placenta growth factor, and adrenomedullin. Sensitization also was associated with a single nucleotide polymorphism near the calcium channel gene CACNA2D3.

“These results suggest the potential for translational research aimed at preventive actions,” the investigators wrote.

The authors reported that they had no conflicts of interest.

[email protected]

SOURCE: Smedler E et al. Eur Neuropsychopharmacol. 2019 Aug 1. doi: 10.1016/j.euroneuro.2019.07.132.

Several potential biomarkers may indicate whether patients with bipolar disorder may have high-recurrence disease with a cycle length that progressively shortens, according to Erik Smedler, MD, PhD, of the department of psychiatry and neurochemistry at Gothenburg (Sweden) University.

For the analysis, published in European Neuropsychopharmacology, Dr. Smedler and fellow investigators recruited 3,074 patients from the Swedish Bipolar Collection between 2009 and 2013 who had at least two inpatient episodes separated by at least 8 weeks. A total of 745 patients had serum samples available; assays for 203 different protein biomarkers were performed on those samples.

The investigators clustered patients according to frequency – with low-frequency recurrence defined as a maximum of one inpatient episode per year – and by cycle length – with sensitized patients having progressively shorter periods between inpatient episodes. No difference in biomarkers or clinical features were seen between high- and low-frequency recurrence patients, but sensitized patients were significantly more ill and were more likely to be treated with antidepressants.

In addition, in a specific cohort of patients who were both sensitized and had a high recurrence rate (at least five inpatient episodes), four proteins were expressed at a significantly lower level than that of nonsensitized patients: tumor necrosis factor receptor-2, tumor necrosis factor receptor superfamily member 4, placenta growth factor, and adrenomedullin. Sensitization also was associated with a single nucleotide polymorphism near the calcium channel gene CACNA2D3.

“These results suggest the potential for translational research aimed at preventive actions,” the investigators wrote.

The authors reported that they had no conflicts of interest.

[email protected]

SOURCE: Smedler E et al. Eur Neuropsychopharmacol. 2019 Aug 1. doi: 10.1016/j.euroneuro.2019.07.132.

Several potential biomarkers may indicate whether patients with bipolar disorder may have high-recurrence disease with a cycle length that progressively shortens, according to Erik Smedler, MD, PhD, of the department of psychiatry and neurochemistry at Gothenburg (Sweden) University.

For the analysis, published in European Neuropsychopharmacology, Dr. Smedler and fellow investigators recruited 3,074 patients from the Swedish Bipolar Collection between 2009 and 2013 who had at least two inpatient episodes separated by at least 8 weeks. A total of 745 patients had serum samples available; assays for 203 different protein biomarkers were performed on those samples.

The investigators clustered patients according to frequency – with low-frequency recurrence defined as a maximum of one inpatient episode per year – and by cycle length – with sensitized patients having progressively shorter periods between inpatient episodes. No difference in biomarkers or clinical features were seen between high- and low-frequency recurrence patients, but sensitized patients were significantly more ill and were more likely to be treated with antidepressants.

In addition, in a specific cohort of patients who were both sensitized and had a high recurrence rate (at least five inpatient episodes), four proteins were expressed at a significantly lower level than that of nonsensitized patients: tumor necrosis factor receptor-2, tumor necrosis factor receptor superfamily member 4, placenta growth factor, and adrenomedullin. Sensitization also was associated with a single nucleotide polymorphism near the calcium channel gene CACNA2D3.

“These results suggest the potential for translational research aimed at preventive actions,” the investigators wrote.

The authors reported that they had no conflicts of interest.

[email protected]

SOURCE: Smedler E et al. Eur Neuropsychopharmacol. 2019 Aug 1. doi: 10.1016/j.euroneuro.2019.07.132.

Individuals with autism spectrum disorder might be at significantly higher risk of bipolar disorder, anxiety, and depression, a new study suggests.

“This study supports the importance of early, ongoing surveillance, and targeted treatments to address the psychiatric needs of individuals with ASD,” wrote lead author Alexandra C. Kirsch, PhD, and associates. The report was published in JAMA Pediatrics.

Dr. Kirsch and associates reported the outcomes of a population-based cohort study involving 1,014 individuals with autism spectrum disorder and 2,028 age-and sex-matched controls without autism spectrum disorder. They found that individuals with autism spectrum disorder were more than nine times more likely to be diagnosed with bipolar disorder, 2.81 times more likely to be diagnosed with depression, and 3.45 times more likely to be diagnosed with anxiety, compared with controls.

“Significant psychosocial sequelae associated with having ASD, including difficulties developing and maintaining relationships, challenges succeeding academically and vocationally, and behaviors that can be problematic to manage, particularly increase risk for mood and anxiety symptoms in individuals with ASD,” wrote Dr. Kirsch of the department of psychiatry and psychology at the Mayo Clinic, Rochester, Minn., and associates. “Individuals with ASD also experience greater rates of other mental health challenges, including attention-deficit/hyperactivity disorder and substance abuse.”

Individuals with autism spectrum disorder who received a diagnosis of depression, anxiety, or bipolar disorder also were more likely to be diagnosed at a younger age than were those without autism. In the case of depression, the median age of diagnosis was 15.7 years, compared with 18.1 years among controls. For anxiety, the median age of diagnosis among individuals with autism spectrum disorder was 15.2 years, compared with 20.3 years for controls. For bipolar disorder, it was 20.3 years, compared with 27 years although the small number of individuals meant this was not statistically significant.

The authors suggested that the earlier age at diagnosis might reflect that individuals with autism spectrum disorder generally are monitored more closely, and are more likely to be connected to screening and diagnostic resources because of their original diagnosis.

The researchers also found that the increased risk of depression and anxiety was even higher among men with autism spectrum disorder, even though the cumulative incidence of these conditions was greater in women both with and without autism. In addition, the researchers noted that individuals with autism spectrum disorder were more likely to be diagnosed with multiple psychiatric conditions than were those without autism.

Dr. Kirsch and associates cited several limitations. One is that the population studied came from Olmsted County, Minn., which is wealthier and less diverse than the general population. Nevertheless, the results could help guide treatments for patients with ASD.

“Given the high rates of comorbidity, researchers and practitioners should develop tools that are specific to the unique needs of this population and effective medications and treatments for mood and anxiety concerns, which remain limited in this population,” they wrote.

The study was funded by grants from the National Institutes of Health and the U.S. Public Health Service. No conflicts of interest were disclosed.

SOURCE: Kirsch A et al. JAMA Pediatr. 2019 Dec 2. doi: 10.1001/jamapediatrics.2019.4368.

Individuals with autism spectrum disorder might be at significantly higher risk of bipolar disorder, anxiety, and depression, a new study suggests.

“This study supports the importance of early, ongoing surveillance, and targeted treatments to address the psychiatric needs of individuals with ASD,” wrote lead author Alexandra C. Kirsch, PhD, and associates. The report was published in JAMA Pediatrics.

Dr. Kirsch and associates reported the outcomes of a population-based cohort study involving 1,014 individuals with autism spectrum disorder and 2,028 age-and sex-matched controls without autism spectrum disorder. They found that individuals with autism spectrum disorder were more than nine times more likely to be diagnosed with bipolar disorder, 2.81 times more likely to be diagnosed with depression, and 3.45 times more likely to be diagnosed with anxiety, compared with controls.

“Significant psychosocial sequelae associated with having ASD, including difficulties developing and maintaining relationships, challenges succeeding academically and vocationally, and behaviors that can be problematic to manage, particularly increase risk for mood and anxiety symptoms in individuals with ASD,” wrote Dr. Kirsch of the department of psychiatry and psychology at the Mayo Clinic, Rochester, Minn., and associates. “Individuals with ASD also experience greater rates of other mental health challenges, including attention-deficit/hyperactivity disorder and substance abuse.”

Individuals with autism spectrum disorder who received a diagnosis of depression, anxiety, or bipolar disorder also were more likely to be diagnosed at a younger age than were those without autism. In the case of depression, the median age of diagnosis was 15.7 years, compared with 18.1 years among controls. For anxiety, the median age of diagnosis among individuals with autism spectrum disorder was 15.2 years, compared with 20.3 years for controls. For bipolar disorder, it was 20.3 years, compared with 27 years although the small number of individuals meant this was not statistically significant.

The authors suggested that the earlier age at diagnosis might reflect that individuals with autism spectrum disorder generally are monitored more closely, and are more likely to be connected to screening and diagnostic resources because of their original diagnosis.

The researchers also found that the increased risk of depression and anxiety was even higher among men with autism spectrum disorder, even though the cumulative incidence of these conditions was greater in women both with and without autism. In addition, the researchers noted that individuals with autism spectrum disorder were more likely to be diagnosed with multiple psychiatric conditions than were those without autism.

Dr. Kirsch and associates cited several limitations. One is that the population studied came from Olmsted County, Minn., which is wealthier and less diverse than the general population. Nevertheless, the results could help guide treatments for patients with ASD.

“Given the high rates of comorbidity, researchers and practitioners should develop tools that are specific to the unique needs of this population and effective medications and treatments for mood and anxiety concerns, which remain limited in this population,” they wrote.

The study was funded by grants from the National Institutes of Health and the U.S. Public Health Service. No conflicts of interest were disclosed.

SOURCE: Kirsch A et al. JAMA Pediatr. 2019 Dec 2. doi: 10.1001/jamapediatrics.2019.4368.

Individuals with autism spectrum disorder might be at significantly higher risk of bipolar disorder, anxiety, and depression, a new study suggests.

“This study supports the importance of early, ongoing surveillance, and targeted treatments to address the psychiatric needs of individuals with ASD,” wrote lead author Alexandra C. Kirsch, PhD, and associates. The report was published in JAMA Pediatrics.

Dr. Kirsch and associates reported the outcomes of a population-based cohort study involving 1,014 individuals with autism spectrum disorder and 2,028 age-and sex-matched controls without autism spectrum disorder. They found that individuals with autism spectrum disorder were more than nine times more likely to be diagnosed with bipolar disorder, 2.81 times more likely to be diagnosed with depression, and 3.45 times more likely to be diagnosed with anxiety, compared with controls.

“Significant psychosocial sequelae associated with having ASD, including difficulties developing and maintaining relationships, challenges succeeding academically and vocationally, and behaviors that can be problematic to manage, particularly increase risk for mood and anxiety symptoms in individuals with ASD,” wrote Dr. Kirsch of the department of psychiatry and psychology at the Mayo Clinic, Rochester, Minn., and associates. “Individuals with ASD also experience greater rates of other mental health challenges, including attention-deficit/hyperactivity disorder and substance abuse.”

Individuals with autism spectrum disorder who received a diagnosis of depression, anxiety, or bipolar disorder also were more likely to be diagnosed at a younger age than were those without autism. In the case of depression, the median age of diagnosis was 15.7 years, compared with 18.1 years among controls. For anxiety, the median age of diagnosis among individuals with autism spectrum disorder was 15.2 years, compared with 20.3 years for controls. For bipolar disorder, it was 20.3 years, compared with 27 years although the small number of individuals meant this was not statistically significant.

The authors suggested that the earlier age at diagnosis might reflect that individuals with autism spectrum disorder generally are monitored more closely, and are more likely to be connected to screening and diagnostic resources because of their original diagnosis.

The researchers also found that the increased risk of depression and anxiety was even higher among men with autism spectrum disorder, even though the cumulative incidence of these conditions was greater in women both with and without autism. In addition, the researchers noted that individuals with autism spectrum disorder were more likely to be diagnosed with multiple psychiatric conditions than were those without autism.

Dr. Kirsch and associates cited several limitations. One is that the population studied came from Olmsted County, Minn., which is wealthier and less diverse than the general population. Nevertheless, the results could help guide treatments for patients with ASD.

“Given the high rates of comorbidity, researchers and practitioners should develop tools that are specific to the unique needs of this population and effective medications and treatments for mood and anxiety concerns, which remain limited in this population,” they wrote.

The study was funded by grants from the National Institutes of Health and the U.S. Public Health Service. No conflicts of interest were disclosed.

SOURCE: Kirsch A et al. JAMA Pediatr. 2019 Dec 2. doi: 10.1001/jamapediatrics.2019.4368.

Alkermes has announced that it has submitted a New Drug Application to the Food and Drug Administration for the approval of ALKS 3831 (olanzapine/samidorphan) for the treatment of schizophrenia and bipolar I disorder.

Included in the application for the investigational, novel, once-daily, oral atypical antipsychotic drug candidate is data from the ENLIGHTEN-1 study, which evaluated the antipsychotic efficacy of ALKS 3831, compared with a placebo, over a 4-week period, as well as data from ENLIGHTEN-2, which compared weight gain with ALKS 3831 and olanzapine alone over a 6-month period.

“Antipsychotic medications are an important part of the treatment paradigm for both schizophrenia and bipolar I disorder, yet there remains a persistent unmet need for new treatments,” Craig Hopkinson, MD, chief medical officer and senior vice president of medicines development and medical affairs at Alkermes, said in a press release.

As a combination of olanzapine and samidorphan, ALKS 3831 is designed to maintain the clinical efficacy of olanzapine and mitigate the substantial weight gain that often results from taking antipsychotics. Samidorphan, an opioid receptor antagonist, is structurally related to naltrexone.

Alkermes is seeking an indication for the treatment of schizophrenia and an indication for the treatment of manic or mixed episodes associated with bipolar I disorder as monotherapy or as an adjunct to lithium or valproate, as well as for maintenance treatment of bipolar I. Dosage strength would be 10 mg of samidorphan with 5, 10, 15, or 20 mg of olanzapine.

Find the full press release on the Alkermes website.

[email protected]

Alkermes has announced that it has submitted a New Drug Application to the Food and Drug Administration for the approval of ALKS 3831 (olanzapine/samidorphan) for the treatment of schizophrenia and bipolar I disorder.

Included in the application for the investigational, novel, once-daily, oral atypical antipsychotic drug candidate is data from the ENLIGHTEN-1 study, which evaluated the antipsychotic efficacy of ALKS 3831, compared with a placebo, over a 4-week period, as well as data from ENLIGHTEN-2, which compared weight gain with ALKS 3831 and olanzapine alone over a 6-month period.

“Antipsychotic medications are an important part of the treatment paradigm for both schizophrenia and bipolar I disorder, yet there remains a persistent unmet need for new treatments,” Craig Hopkinson, MD, chief medical officer and senior vice president of medicines development and medical affairs at Alkermes, said in a press release.

As a combination of olanzapine and samidorphan, ALKS 3831 is designed to maintain the clinical efficacy of olanzapine and mitigate the substantial weight gain that often results from taking antipsychotics. Samidorphan, an opioid receptor antagonist, is structurally related to naltrexone.

Alkermes is seeking an indication for the treatment of schizophrenia and an indication for the treatment of manic or mixed episodes associated with bipolar I disorder as monotherapy or as an adjunct to lithium or valproate, as well as for maintenance treatment of bipolar I. Dosage strength would be 10 mg of samidorphan with 5, 10, 15, or 20 mg of olanzapine.

Find the full press release on the Alkermes website.

[email protected]

Alkermes has announced that it has submitted a New Drug Application to the Food and Drug Administration for the approval of ALKS 3831 (olanzapine/samidorphan) for the treatment of schizophrenia and bipolar I disorder.

Included in the application for the investigational, novel, once-daily, oral atypical antipsychotic drug candidate is data from the ENLIGHTEN-1 study, which evaluated the antipsychotic efficacy of ALKS 3831, compared with a placebo, over a 4-week period, as well as data from ENLIGHTEN-2, which compared weight gain with ALKS 3831 and olanzapine alone over a 6-month period.

“Antipsychotic medications are an important part of the treatment paradigm for both schizophrenia and bipolar I disorder, yet there remains a persistent unmet need for new treatments,” Craig Hopkinson, MD, chief medical officer and senior vice president of medicines development and medical affairs at Alkermes, said in a press release.

As a combination of olanzapine and samidorphan, ALKS 3831 is designed to maintain the clinical efficacy of olanzapine and mitigate the substantial weight gain that often results from taking antipsychotics. Samidorphan, an opioid receptor antagonist, is structurally related to naltrexone.

Alkermes is seeking an indication for the treatment of schizophrenia and an indication for the treatment of manic or mixed episodes associated with bipolar I disorder as monotherapy or as an adjunct to lithium or valproate, as well as for maintenance treatment of bipolar I. Dosage strength would be 10 mg of samidorphan with 5, 10, 15, or 20 mg of olanzapine.

Find the full press release on the Alkermes website.

[email protected]