Update on Migraine Prevention 2023

What is your experience with prescribing preventive medication for your patients with migraine?

Roughly 40% of patients living with migraine should be on preventive medication or other treatment, but probably fewer than 15% of patients with migraine are currently receiving therapy. There are several reasons for this: General physicians rarely put patients on preventive medication unless they are interested in or knowledgeable about headache, and the older preventive medicines that neurologists and headache specialists have used for many years have a lot of potential side effects and do not begin to work quickly.

It takes approximately 2 to 3 months for preventive medication to become effective, and many patients need to be slowly titrated up to an effective dose. By the time patients reach a steady state over a few weeks, if it is still not working well, they must slowly taper it and try something else. This is  what often occurs with older preventive migraine medications—especially one of the most commonly used preventives, topiramate (Topamax). This drug was first indicated for epilepsy and then later for mood stabilization. Though it has good efficacy in reducing migraine attacks, it has many possible side effects, some of them troublesome. I often had multiple calls from patients in their first month of taking it complain of memory or word-finding issues and tingling in the extremities. More serious adverse events can be increased pressure in the eyes, such as glaucoma, and kidney stones. I often get referrals from other neurologists and headache specialists regarding patients who have failed multiple preventive medicines; 90% percent of these referrals need to be switched to the newer, more costly calcitonin gene-related peptide (CGRP)-blocking preventative medications, if insurance companies will cover them. 

What categories of migraine preventive drugs do you generally prescribe your patients?

Of the older medications, most are epilepsy medicines, beta blockers, antidepressants, or cardiac medications such as angiotensin receptor blockers (candesartan). Of the newer medications, I use 1 of the 4 injectable monoclonal antibodies (mAbs), or 1 of the 2 gepants.

Older migraine preventive medication

Anticonvulsants (epilepsy medications)

Anticonvulsants are used for the treatment of several conditions, including epilepsy and pain control, but some can help reduce migraine attacks. These medicines, like all drugs, have the potential to cause side effects, especially topiramate; this medicine often causes paresthesia or tingling in the extremities as well as trouble with speech and memory, kidney stones, pancreatitis, and weight loss. The weight loss side effect of this drug has made it more appealing for some patients who had previously gained 10 to 15 pounds taking antidepressant medication to treat their migraine. I personally thought it was the most effective of all the preventive migraine medications if the patient could tolerate it.

Beta Blockers

Beta blockers cause the heart rate to decrease and also lower blood pressure. Most of my migraine patients are healthy females in their 20s and 30s and, when taking a beta blocker, can get short of breath when they exercise. These medications can also cause some depression and gastrointestinal issues and raise cholesterol levels.

Antidepressants

The type of antidepressants that I normally prescribe for migraine prevention are the tricyclic antidepressants. The one that has the best data in the literature and is often prescribed is amitriptyline (Elavil); I prefer a cousin to this medicine, nortriptyline. I prescribe tricyclics because many of my migraine patients have 2 other comorbid problems: depression and trouble staying asleep at night. Amitriptyline tends to cause drowsiness and can help patients sleep. It can also cause dry mouth, trouble urinating (especially in men), constipation, weight gain, and can slow patients down mentally, so it should not be prescribed to elderly patients. These antidepressants should be prescribed in very low doses and taken an hour before bedtime. The dose should be increased gradually over several weeks to help reduce adverse events. The best dose for migraine is often lower than the antidepressant dose, so sometimes a depressed patient needs 2 types of antidepressants. The typical dose for migraine prevention is about 50 to 75 mg. For depression, it is about 150 mg.

The patient would then need to increase their dose gradually for a month and remain on the target dose for at least another month. At the end of 2 months, they would have some idea whether it was working for them. If it was not, I might increase the dose even further. It is important to set expectations with patients at the beginning of treatment and tell them it is going to take 2 to 3 months to see if it works.  If it does not work, I tell them, we will have to try another one, and that is going to take 2 or 3 months as well, until we can switch to the newer medications, which start to work in the first month, often in the first few days. 

Why wouldn’t we just start with the newer preventives? Insurance companies require patients to fail, on average, 2 categories of the older medications before they will pay for the newer ones. Medicare usually only covers the older generic medications.

New migraine preventive medications

Monoclonal Antibodies

mAbs that block CGRP for the prevention of migraine, such as erenumab, fremanezumab, galcanezumab, and eptinezumab, target either the CGRP ligand itself or block the receptor to CGRP. This class of medication became available about 5 years ago. The first one approved was erenumab (Aimovig). It was tried by a lot of headache specialists, many neurologists, and then some general physicians once it came to market. It is the only one in its class that grabs the ligand CGRP and prevents it from docking on its receptor. Recently, 5-year safety data indicated it is extremely safe with only a few side effects, (it has been shown to cause some constipation and hypertension). It does, however, tend to lower the number of migraine days per month by about 40% to 50%. At the beginning of erenumab’s availability, researchers took patients that had 8 to 22 days of migraine per month and put them in double-blind, placebo-controlled, randomized trials. They found that some patients' migraine days went down gradually to 10 to 12 days from 20 migraine days per month. Erenumab works quickly, and most patients improve within 2 weeks.

Fremanezumab (AJOVY™) was the second mAb approved, followed pretty quickly by the third, galcanezumab (Emgality™). All 3 of these mAbs are administered once a month by a subcutaneous injection from an autoinjector. If a patient takes 3 fremanezumab injections in 1 day, they do not have to repeat that dose for 3 months. The upside of these 3 treatments is that the patient can self-administer the medication at home with few, if any, adverse events; the downside is they are expensive medications, costing about $600 per month. 

Shortly thereafter, a fourth mAb, eptinezumab (VYEPTI™), was brought to market. Unlike the other 3 mAbs, it is administered as an intravenous infusion. The patient must come to an office or infusion center for a 30-minute intravenous infusion, which is not as convenient as treating themselves with an autoinjector at home. Eptinezumab is a strong medication that is often prescribed when other treatments are not effective. Each of the 4 mAbs has its own possible adverse events, but these are few and usually mild. The mAbs have a half-life of about 28 to 32 days; it takes 5 to 6 months after an injection for these mAbs to be metabolized by the reticuloendothelial system. 

Gepants

The gepants are small molecule CGRP receptor blockers with much shorter half-lives than mAbs. They work by blocking the CGRP receptor so the CGRP ligand cannot dock there and cause vasodilation and increased pain transmission. Gepants have half-lives of 6 to 12 hours and can be used to treat a migraine acutely. Several drug companies studied the effects of taking a gepant every day or every other day, showing it can also be used as a migraine preventive medication. Ubrogepant (Ubrelvy®) was the first gepant to receive approval from the US Food and Drug Administration (FDA), but it was authorized only for acute care. Rimegepant (Nurtec®) was the second gepant approved, initially for acute treatment and later becoming the first gepant approved for migraine prevention. The same tablet can be used for acute care or for prevention. Preventive treatment consists of one 75 mg oral disintegrating tablet taken every second day. It works quite well as a preventive and has very few side effects. Nausea and abdominal discomfort occur in < 3% of patients. Some patients prefer to take a pill every other day over having an injection once per month or once every 3 months. It makes more sense for a woman of childbearing potential to take a drug with very short half-life vs one that lasts for 5 to 6 months in case she decides to become pregnant (or unexpectedly becomes pregnant).

A third gepant, atogepant (Qulipta™), was later approved, but only for prevention. It is available in 3 different strengths: 10 mg, 30 mg, and 60 mg. I tend to prescribe the 60-mg strength, and the dose is 1 pill every day. 

If you compare rimegepant, which is taken once every other day, and atogepant, taken once daily, the latter tends to have slightly more side effects of nausea, drowsiness, and constipation, whereas rimegepant has been shown to have fewer side effects in double-blind, randomized studies. Like all gepants, it is quite effective and fast acting. 

The goal of preventive medications is to decrease the frequency, severity, and duration of migraine attacks. Effective treatment can increase responsiveness to acute migraine therapy and improve the quality of life in patients suffering from migraine. Every patient is different and thus the side effects they experience vary. With time and patience, most patients find the relief from migraine they have been desperately seeking through the preventive medicines discussed above. This is a good time to have migraine, if you can get in to see a knowledgeable doctor and your insurance company cooperates. When I started my neurology practice 51 years ago, we had few preventives, and none approved by the FDA. Now we have several older, approved preventives—4 newer mAbs, and 2 newer gepants—as well as several devices, which we will discuss in the future.

What is your experience with prescribing preventive medication for your patients with migraine?

Roughly 40% of patients living with migraine should be on preventive medication or other treatment, but probably fewer than 15% of patients with migraine are currently receiving therapy. There are several reasons for this: General physicians rarely put patients on preventive medication unless they are interested in or knowledgeable about headache, and the older preventive medicines that neurologists and headache specialists have used for many years have a lot of potential side effects and do not begin to work quickly.

It takes approximately 2 to 3 months for preventive medication to become effective, and many patients need to be slowly titrated up to an effective dose. By the time patients reach a steady state over a few weeks, if it is still not working well, they must slowly taper it and try something else. This is  what often occurs with older preventive migraine medications—especially one of the most commonly used preventives, topiramate (Topamax). This drug was first indicated for epilepsy and then later for mood stabilization. Though it has good efficacy in reducing migraine attacks, it has many possible side effects, some of them troublesome. I often had multiple calls from patients in their first month of taking it complain of memory or word-finding issues and tingling in the extremities. More serious adverse events can be increased pressure in the eyes, such as glaucoma, and kidney stones. I often get referrals from other neurologists and headache specialists regarding patients who have failed multiple preventive medicines; 90% percent of these referrals need to be switched to the newer, more costly calcitonin gene-related peptide (CGRP)-blocking preventative medications, if insurance companies will cover them. 

What categories of migraine preventive drugs do you generally prescribe your patients?

Of the older medications, most are epilepsy medicines, beta blockers, antidepressants, or cardiac medications such as angiotensin receptor blockers (candesartan). Of the newer medications, I use 1 of the 4 injectable monoclonal antibodies (mAbs), or 1 of the 2 gepants.

Older migraine preventive medication

Anticonvulsants (epilepsy medications)

Anticonvulsants are used for the treatment of several conditions, including epilepsy and pain control, but some can help reduce migraine attacks. These medicines, like all drugs, have the potential to cause side effects, especially topiramate; this medicine often causes paresthesia or tingling in the extremities as well as trouble with speech and memory, kidney stones, pancreatitis, and weight loss. The weight loss side effect of this drug has made it more appealing for some patients who had previously gained 10 to 15 pounds taking antidepressant medication to treat their migraine. I personally thought it was the most effective of all the preventive migraine medications if the patient could tolerate it.

Beta Blockers

Beta blockers cause the heart rate to decrease and also lower blood pressure. Most of my migraine patients are healthy females in their 20s and 30s and, when taking a beta blocker, can get short of breath when they exercise. These medications can also cause some depression and gastrointestinal issues and raise cholesterol levels.

Antidepressants

The type of antidepressants that I normally prescribe for migraine prevention are the tricyclic antidepressants. The one that has the best data in the literature and is often prescribed is amitriptyline (Elavil); I prefer a cousin to this medicine, nortriptyline. I prescribe tricyclics because many of my migraine patients have 2 other comorbid problems: depression and trouble staying asleep at night. Amitriptyline tends to cause drowsiness and can help patients sleep. It can also cause dry mouth, trouble urinating (especially in men), constipation, weight gain, and can slow patients down mentally, so it should not be prescribed to elderly patients. These antidepressants should be prescribed in very low doses and taken an hour before bedtime. The dose should be increased gradually over several weeks to help reduce adverse events. The best dose for migraine is often lower than the antidepressant dose, so sometimes a depressed patient needs 2 types of antidepressants. The typical dose for migraine prevention is about 50 to 75 mg. For depression, it is about 150 mg.

The patient would then need to increase their dose gradually for a month and remain on the target dose for at least another month. At the end of 2 months, they would have some idea whether it was working for them. If it was not, I might increase the dose even further. It is important to set expectations with patients at the beginning of treatment and tell them it is going to take 2 to 3 months to see if it works.  If it does not work, I tell them, we will have to try another one, and that is going to take 2 or 3 months as well, until we can switch to the newer medications, which start to work in the first month, often in the first few days. 

Why wouldn’t we just start with the newer preventives? Insurance companies require patients to fail, on average, 2 categories of the older medications before they will pay for the newer ones. Medicare usually only covers the older generic medications.

New migraine preventive medications

Monoclonal Antibodies

mAbs that block CGRP for the prevention of migraine, such as erenumab, fremanezumab, galcanezumab, and eptinezumab, target either the CGRP ligand itself or block the receptor to CGRP. This class of medication became available about 5 years ago. The first one approved was erenumab (Aimovig). It was tried by a lot of headache specialists, many neurologists, and then some general physicians once it came to market. It is the only one in its class that grabs the ligand CGRP and prevents it from docking on its receptor. Recently, 5-year safety data indicated it is extremely safe with only a few side effects, (it has been shown to cause some constipation and hypertension). It does, however, tend to lower the number of migraine days per month by about 40% to 50%. At the beginning of erenumab’s availability, researchers took patients that had 8 to 22 days of migraine per month and put them in double-blind, placebo-controlled, randomized trials. They found that some patients' migraine days went down gradually to 10 to 12 days from 20 migraine days per month. Erenumab works quickly, and most patients improve within 2 weeks.

Fremanezumab (AJOVY™) was the second mAb approved, followed pretty quickly by the third, galcanezumab (Emgality™). All 3 of these mAbs are administered once a month by a subcutaneous injection from an autoinjector. If a patient takes 3 fremanezumab injections in 1 day, they do not have to repeat that dose for 3 months. The upside of these 3 treatments is that the patient can self-administer the medication at home with few, if any, adverse events; the downside is they are expensive medications, costing about $600 per month. 

Shortly thereafter, a fourth mAb, eptinezumab (VYEPTI™), was brought to market. Unlike the other 3 mAbs, it is administered as an intravenous infusion. The patient must come to an office or infusion center for a 30-minute intravenous infusion, which is not as convenient as treating themselves with an autoinjector at home. Eptinezumab is a strong medication that is often prescribed when other treatments are not effective. Each of the 4 mAbs has its own possible adverse events, but these are few and usually mild. The mAbs have a half-life of about 28 to 32 days; it takes 5 to 6 months after an injection for these mAbs to be metabolized by the reticuloendothelial system. 

Gepants

The gepants are small molecule CGRP receptor blockers with much shorter half-lives than mAbs. They work by blocking the CGRP receptor so the CGRP ligand cannot dock there and cause vasodilation and increased pain transmission. Gepants have half-lives of 6 to 12 hours and can be used to treat a migraine acutely. Several drug companies studied the effects of taking a gepant every day or every other day, showing it can also be used as a migraine preventive medication. Ubrogepant (Ubrelvy®) was the first gepant to receive approval from the US Food and Drug Administration (FDA), but it was authorized only for acute care. Rimegepant (Nurtec®) was the second gepant approved, initially for acute treatment and later becoming the first gepant approved for migraine prevention. The same tablet can be used for acute care or for prevention. Preventive treatment consists of one 75 mg oral disintegrating tablet taken every second day. It works quite well as a preventive and has very few side effects. Nausea and abdominal discomfort occur in < 3% of patients. Some patients prefer to take a pill every other day over having an injection once per month or once every 3 months. It makes more sense for a woman of childbearing potential to take a drug with very short half-life vs one that lasts for 5 to 6 months in case she decides to become pregnant (or unexpectedly becomes pregnant).

A third gepant, atogepant (Qulipta™), was later approved, but only for prevention. It is available in 3 different strengths: 10 mg, 30 mg, and 60 mg. I tend to prescribe the 60-mg strength, and the dose is 1 pill every day. 

If you compare rimegepant, which is taken once every other day, and atogepant, taken once daily, the latter tends to have slightly more side effects of nausea, drowsiness, and constipation, whereas rimegepant has been shown to have fewer side effects in double-blind, randomized studies. Like all gepants, it is quite effective and fast acting. 

The goal of preventive medications is to decrease the frequency, severity, and duration of migraine attacks. Effective treatment can increase responsiveness to acute migraine therapy and improve the quality of life in patients suffering from migraine. Every patient is different and thus the side effects they experience vary. With time and patience, most patients find the relief from migraine they have been desperately seeking through the preventive medicines discussed above. This is a good time to have migraine, if you can get in to see a knowledgeable doctor and your insurance company cooperates. When I started my neurology practice 51 years ago, we had few preventives, and none approved by the FDA. Now we have several older, approved preventives—4 newer mAbs, and 2 newer gepants—as well as several devices, which we will discuss in the future.

What is your experience with prescribing preventive medication for your patients with migraine?

Roughly 40% of patients living with migraine should be on preventive medication or other treatment, but probably fewer than 15% of patients with migraine are currently receiving therapy. There are several reasons for this: General physicians rarely put patients on preventive medication unless they are interested in or knowledgeable about headache, and the older preventive medicines that neurologists and headache specialists have used for many years have a lot of potential side effects and do not begin to work quickly.

It takes approximately 2 to 3 months for preventive medication to become effective, and many patients need to be slowly titrated up to an effective dose. By the time patients reach a steady state over a few weeks, if it is still not working well, they must slowly taper it and try something else. This is  what often occurs with older preventive migraine medications—especially one of the most commonly used preventives, topiramate (Topamax). This drug was first indicated for epilepsy and then later for mood stabilization. Though it has good efficacy in reducing migraine attacks, it has many possible side effects, some of them troublesome. I often had multiple calls from patients in their first month of taking it complain of memory or word-finding issues and tingling in the extremities. More serious adverse events can be increased pressure in the eyes, such as glaucoma, and kidney stones. I often get referrals from other neurologists and headache specialists regarding patients who have failed multiple preventive medicines; 90% percent of these referrals need to be switched to the newer, more costly calcitonin gene-related peptide (CGRP)-blocking preventative medications, if insurance companies will cover them. 

What categories of migraine preventive drugs do you generally prescribe your patients?

Of the older medications, most are epilepsy medicines, beta blockers, antidepressants, or cardiac medications such as angiotensin receptor blockers (candesartan). Of the newer medications, I use 1 of the 4 injectable monoclonal antibodies (mAbs), or 1 of the 2 gepants.

Older migraine preventive medication

Anticonvulsants (epilepsy medications)

Anticonvulsants are used for the treatment of several conditions, including epilepsy and pain control, but some can help reduce migraine attacks. These medicines, like all drugs, have the potential to cause side effects, especially topiramate; this medicine often causes paresthesia or tingling in the extremities as well as trouble with speech and memory, kidney stones, pancreatitis, and weight loss. The weight loss side effect of this drug has made it more appealing for some patients who had previously gained 10 to 15 pounds taking antidepressant medication to treat their migraine. I personally thought it was the most effective of all the preventive migraine medications if the patient could tolerate it.

Beta Blockers

Beta blockers cause the heart rate to decrease and also lower blood pressure. Most of my migraine patients are healthy females in their 20s and 30s and, when taking a beta blocker, can get short of breath when they exercise. These medications can also cause some depression and gastrointestinal issues and raise cholesterol levels.

Antidepressants

The type of antidepressants that I normally prescribe for migraine prevention are the tricyclic antidepressants. The one that has the best data in the literature and is often prescribed is amitriptyline (Elavil); I prefer a cousin to this medicine, nortriptyline. I prescribe tricyclics because many of my migraine patients have 2 other comorbid problems: depression and trouble staying asleep at night. Amitriptyline tends to cause drowsiness and can help patients sleep. It can also cause dry mouth, trouble urinating (especially in men), constipation, weight gain, and can slow patients down mentally, so it should not be prescribed to elderly patients. These antidepressants should be prescribed in very low doses and taken an hour before bedtime. The dose should be increased gradually over several weeks to help reduce adverse events. The best dose for migraine is often lower than the antidepressant dose, so sometimes a depressed patient needs 2 types of antidepressants. The typical dose for migraine prevention is about 50 to 75 mg. For depression, it is about 150 mg.

The patient would then need to increase their dose gradually for a month and remain on the target dose for at least another month. At the end of 2 months, they would have some idea whether it was working for them. If it was not, I might increase the dose even further. It is important to set expectations with patients at the beginning of treatment and tell them it is going to take 2 to 3 months to see if it works.  If it does not work, I tell them, we will have to try another one, and that is going to take 2 or 3 months as well, until we can switch to the newer medications, which start to work in the first month, often in the first few days. 

Why wouldn’t we just start with the newer preventives? Insurance companies require patients to fail, on average, 2 categories of the older medications before they will pay for the newer ones. Medicare usually only covers the older generic medications.

New migraine preventive medications

Monoclonal Antibodies

mAbs that block CGRP for the prevention of migraine, such as erenumab, fremanezumab, galcanezumab, and eptinezumab, target either the CGRP ligand itself or block the receptor to CGRP. This class of medication became available about 5 years ago. The first one approved was erenumab (Aimovig). It was tried by a lot of headache specialists, many neurologists, and then some general physicians once it came to market. It is the only one in its class that grabs the ligand CGRP and prevents it from docking on its receptor. Recently, 5-year safety data indicated it is extremely safe with only a few side effects, (it has been shown to cause some constipation and hypertension). It does, however, tend to lower the number of migraine days per month by about 40% to 50%. At the beginning of erenumab’s availability, researchers took patients that had 8 to 22 days of migraine per month and put them in double-blind, placebo-controlled, randomized trials. They found that some patients' migraine days went down gradually to 10 to 12 days from 20 migraine days per month. Erenumab works quickly, and most patients improve within 2 weeks.

Fremanezumab (AJOVY™) was the second mAb approved, followed pretty quickly by the third, galcanezumab (Emgality™). All 3 of these mAbs are administered once a month by a subcutaneous injection from an autoinjector. If a patient takes 3 fremanezumab injections in 1 day, they do not have to repeat that dose for 3 months. The upside of these 3 treatments is that the patient can self-administer the medication at home with few, if any, adverse events; the downside is they are expensive medications, costing about $600 per month. 

Shortly thereafter, a fourth mAb, eptinezumab (VYEPTI™), was brought to market. Unlike the other 3 mAbs, it is administered as an intravenous infusion. The patient must come to an office or infusion center for a 30-minute intravenous infusion, which is not as convenient as treating themselves with an autoinjector at home. Eptinezumab is a strong medication that is often prescribed when other treatments are not effective. Each of the 4 mAbs has its own possible adverse events, but these are few and usually mild. The mAbs have a half-life of about 28 to 32 days; it takes 5 to 6 months after an injection for these mAbs to be metabolized by the reticuloendothelial system. 

Gepants

The gepants are small molecule CGRP receptor blockers with much shorter half-lives than mAbs. They work by blocking the CGRP receptor so the CGRP ligand cannot dock there and cause vasodilation and increased pain transmission. Gepants have half-lives of 6 to 12 hours and can be used to treat a migraine acutely. Several drug companies studied the effects of taking a gepant every day or every other day, showing it can also be used as a migraine preventive medication. Ubrogepant (Ubrelvy®) was the first gepant to receive approval from the US Food and Drug Administration (FDA), but it was authorized only for acute care. Rimegepant (Nurtec®) was the second gepant approved, initially for acute treatment and later becoming the first gepant approved for migraine prevention. The same tablet can be used for acute care or for prevention. Preventive treatment consists of one 75 mg oral disintegrating tablet taken every second day. It works quite well as a preventive and has very few side effects. Nausea and abdominal discomfort occur in < 3% of patients. Some patients prefer to take a pill every other day over having an injection once per month or once every 3 months. It makes more sense for a woman of childbearing potential to take a drug with very short half-life vs one that lasts for 5 to 6 months in case she decides to become pregnant (or unexpectedly becomes pregnant).

A third gepant, atogepant (Qulipta™), was later approved, but only for prevention. It is available in 3 different strengths: 10 mg, 30 mg, and 60 mg. I tend to prescribe the 60-mg strength, and the dose is 1 pill every day. 

If you compare rimegepant, which is taken once every other day, and atogepant, taken once daily, the latter tends to have slightly more side effects of nausea, drowsiness, and constipation, whereas rimegepant has been shown to have fewer side effects in double-blind, randomized studies. Like all gepants, it is quite effective and fast acting. 

The goal of preventive medications is to decrease the frequency, severity, and duration of migraine attacks. Effective treatment can increase responsiveness to acute migraine therapy and improve the quality of life in patients suffering from migraine. Every patient is different and thus the side effects they experience vary. With time and patience, most patients find the relief from migraine they have been desperately seeking through the preventive medicines discussed above. This is a good time to have migraine, if you can get in to see a knowledgeable doctor and your insurance company cooperates. When I started my neurology practice 51 years ago, we had few preventives, and none approved by the FDA. Now we have several older, approved preventives—4 newer mAbs, and 2 newer gepants—as well as several devices, which we will discuss in the future.