Does Botox Really Work for Migraines?

The first reaction is almost always the same. Isn’t that the wrinkle thing?

Same medication, different job. Botox has been approved for chronic migraine since 2010, and the version used for headaches goes to different places, in a different pattern, for an entirely different reason.

Here are the questions patients actually ask us about it, answered in order.

Not by relaxing muscles, which is what most people assume.

Botox works on the nerve endings themselves. It interferes with the release of the chemical messengers that carry pain signals, including CGRP, the same protein that newer migraine medications target. Blocking those signals at the source makes it harder for an attack to get started.

That makes it a preventive treatment. It won’t do anything for a migraine you already have. What it does is lower the number of attacks that happen in the first place.

The approval came out of a pair of large trials known as PREEMPT, which studied people with chronic migraine.

People receiving Botox had roughly eight to nine fewer headache days a month by the end of the study period.

In the longer follow-up, around 70 percent of patients had their headache days cut by at least half.

That’s a real effect, and it’s also a realistic one. Botox reduces how often migraines happen. It doesn’t make them stop.

Botox is approved specifically for chronic migraine, meaning 15 or more headache days a month for at least three months.

If you get six or eight migraines a month, even severe ones, that’s episodic migraine, and Botox isn’t approved for it. Insurance won’t cover it, and most providers won’t offer it. There are other preventive options built for that group, including CGRP medications.

A fair number of people do turn out to qualify once they start tracking. Headache days blur together, and it’s common to guess low.

Shorter than most people expect. The injections themselves take about 15 minutes.

The protocol calls for 31 injections across seven areas of the head and neck: forehead, temples, the back of the head, the neck, and the upper shoulders. They follow a fixed pattern, which is part of why the treatment works as consistently as it does.

The needle is very small. Most people describe a quick pinprick or a light pressure, sometimes a brief sting in the more sensitive spots along the hairline. There’s no sedation and no recovery time. You drive yourself home and go back to your day.

Treatment is repeated every 12 weeks.

Some people feel a difference within two to four weeks of the first round. Others feel nothing at all after the first one.

That’s the part worth preparing for. In the studies, results built with each cycle, and patients who continued past the first treatment generally did better than the first round alone would have predicted.

Stopping after one round is the most common way people conclude Botox didn’t work for them. Give it two or three cycles, which is roughly six to nine months, before making that call.

The practical version: keep tracking your headache days through the first year. It’s the only reliable way to tell whether it’s working, and insurance usually wants to see that data to keep approving treatment.

Most are mild and temporary. Soreness at the injection sites for a day or two. Neck stiffness, which is the most commonly reported one, usually in the first week. Occasionally a mild headache right after treatment.

A small number of people get temporary drooping of an eyelid or eyebrow, which happens when the medication spreads slightly beyond where it was placed. It resolves on its own, typically within a few weeks.

Serious problems are rare. The labeling carries a warning that the medication can spread beyond the injection area, and although that’s uncommon at the doses used for migraine, anyone who develops trouble swallowing, speaking, or breathing after treatment should be seen right away.

Less than you’d think, because the pattern is different. Migraine treatment spreads injections across the back of the head, the neck, and the shoulders, areas cosmetic treatment doesn’t touch.

There is overlap at the forehead and temples, so some people do notice their forehead looks smoother. Most consider that a side benefit. If it’s a concern, say so at your appointment.

It won’t help an attack that’s already underway. You’ll still need something for acute treatment.

It isn’t a cure, and it isn’t permanent. The effect wears off over about 12 weeks, which is why treatment repeats on that schedule.

And it doesn’t work for everyone. Some patients see very little benefit after a fair trial. That’s a reason to move on to something else, and there are more options now than there were five years ago.

Most insurance plans cover Botox for chronic migraine, including Medicare, once the criteria are met. That generally means a documented diagnosis, a record of other preventive medications you’ve tried, and prior authorization before the first treatment.

Our office handles the authorization paperwork. If you have commercial insurance, a manufacturer savings program can reduce what’s left over.

We wrote a separate post walking through coverage in detail, including what to do if your plan says no.