Botox prevents chronic migraine by blocking the chemical messengers that carry pain signals from nerve endings around the head. It is approved only for chronic migraine, which means headache on 15 or more days a month for at least three months, and only after two standard oral preventives have failed or could not be tolerated. Treatment is 31 small injections across the head, neck and shoulders, repeated every 12 weeks, and most patients see clear improvement by the second or third cycle.
What chronic migraine means
Migraine is chronic when a person has headache on 15 or more days a month, for at least three months, with at least eight of those days having migraine features. It is a different condition from occasional migraine. It often develops after years of frequent attacks, sometimes made worse by overuse of the painkillers taken to treat them. Treating each attack as it comes does not work well at this frequency, so the goal shifts to prevention: fewer migraine days in the month, and milder attacks when they happen.
How Botox prevents migraine
Botox is the brand name of onabotulinumtoxinA. Injected in very small amounts into the muscles of the head and neck, it has two effects. The main one is on the nerves: it blocks the release of the chemical messengers that carry pain signals from nerve endings around the head, which appears to stop the cascade that turns a headache into a full migraine. The second is muscle relaxation, which reduces the tension in the temples, forehead, neck and shoulders that triggers attacks for many people.
In the trials that led to approval, people with chronic migraine treated with Botox had around eight to nine fewer headache days a month after six months. People given placebo injections also improved, so the drug's real advantage is smaller than that headline figure. It was consistent enough for the FDA to approve it and for every major insurer to cover it under the right conditions.
Who qualifies
Botox is approved for chronic migraine only. It does not help episodic migraine, tension headache or cluster headache, and it does not treat an attack in progress. To qualify you need:
- Headache on 15 or more days a month for at least three months, documented, ideally in a headache diary.
- A diagnosis of chronic migraine from a physician who has ruled out other causes.
- A trial of at least two standard oral preventives, such as a beta blocker, an anti-seizure medication or an antidepressant used for migraine, that did not work or could not be tolerated.
Those are the criteria every insurer applies before authorizing treatment, and every payer requires prior authorization. Our office assembles the documentation and submits it. Dr. Charley Scheim, the neurologist who performs the injections, reviews your history first to make sure it is complete.
What the treatment involves
Dr. Scheim uses a very fine needle to place 31 small injections across seven muscle groups: forehead, temples, back of the head, neck and upper shoulders. It takes about 15 to 20 minutes. Most patients describe a series of small pinches. You can drive home and go back to work the same day, and some soreness or a mild headache for a day or two afterward is common.
Injections are repeated every 12 weeks. The effect wears off gradually, so stretching the gap usually means the migraines creep back before the next appointment. The first cycle is rarely the full picture: most patients see clear improvement by the second or third cycle, which is why insurers authorize an initial course of two cycles and then look for evidence that it is working before continuing.
What patients report
The people who do best describe fewer migraine days, and milder attacks that are easier to treat when they do happen. Many mention better sleep and more reliable concentration at work, and relief at no longer taking a daily preventive pill with its own side effects. Botox does not cause drowsiness, weight gain or the mental fog some oral preventives do, and there is no risk of dependence.
It is not for everyone. Some people get little benefit, and we say so after the second cycle rather than continuing indefinitely. For them there are other options, including the newer CGRP-targeting preventives, which we discuss on our Botox for migraines page and in clinic.
Talk to a neurologist who does this every week
At AffordaHealth, Botox for chronic migraine is performed by Dr. Charley Scheim, a neurologist with more than 20 years of experience in headache and chronic pain, at both our Davie and Boynton Beach clinics. If you are managing 15 or more headache days a month, book an appointment online. You can also call either clinic and the front desk will check your coverage first. Our headache treatment page covers the other options we offer.
Questions patients ask
How many headache days do I need to qualify for Botox?
Fifteen or more headache days a month for at least three months, with at least eight of them having migraine features. Insurers also require that you have tried at least two standard oral preventive medications first.
Does insurance cover Botox for migraine?
Medicare, Aetna, Blue Cross Blue Shield and Cigna cover it for chronic migraine, and every payer requires prior authorization. Our office prepares and submits the documentation before your first treatment.
How long does Botox take to work for migraine?
Some improvement can appear after the first cycle, but most patients see the clear benefit by the second or third cycle, which is why the initial authorization usually covers two cycles 12 weeks apart.
Who performs the injections at AffordaHealth?
Dr. Charley Scheim, DO, a neurologist with more than 20 years of experience in headache and chronic pain. Treatment is available at both the Davie and Boynton Beach clinics.