Can Botox Treat Migraines?

What This Means

Botox (onabotulinumtoxinA) is FDA-approved to prevent headaches in adults with chronic migraine — 15 or more headache days a month, each lasting four hours or longer (Allergan, Inc., 2011). It is not approved for occasional or episodic migraine, and clinical trials have not shown it to work in that group. In controlled trials, it modestly reduced how many headache days patients had compared with placebo (Dodick et al., 2010). Whether it is a reasonable option depends on migraine frequency, what has already been tried, and a clinical evaluation.

Migraine treatment splits into two categories: medication taken during an attack to stop it, and preventive treatment meant to reduce how often attacks happen in the first place. Botox falls into the second category. It is a preventive, not a rescue treatment, and it will not stop a migraine that has already started.

The FDA approval, granted in October 2010, is specific to chronic migraine: headaches on 15 or more days a month, with at least 8 of those meeting migraine criteria, each episode lasting four hours or longer without treatment (Allergan, Inc., 2011). That is a meaningfully higher bar than most people picture when they hear the word "migraine." Someone with 4 or 8 headache days a month — a real and disruptive pattern — does not meet the FDA's chronic migraine definition, and Botox has not been shown to help in that group (American Migraine Foundation, n.d.).

Candidacy

Botox for migraine is generally considered for adults who:

• Have chronic migraine — 15 or more headache days a month, each lasting 4 or more hours, present for at least 3 months
• Have already tried, and not tolerated or responded well to, at least one or two standard oral preventive medications (most insurers require this before authorizing Botox)
• Do not have a condition that rules out botulinum toxin injection, such as a known neuromuscular disorder or an active infection at the planned injection sites

Candidacy is not self-diagnosed. A headache pattern needs to be confirmed against these criteria, usually with a headache diary tracking frequency and duration, before Botox is a reasonable next step (Mayo Clinic Press, n.d.).

Clinical Evaluation

An evaluation for migraine Botox typically includes a headache history covering frequency, duration, and what has already been tried, plus a review for secondary causes of frequent headache, such as medication overuse, sleep disorders, or other neurological conditions that can mimic chronic migraine. The physician also confirms there is no contraindication to botulinum toxin and discusses realistic expectations before any treatment begins.

Available Options

Botox is one of several FDA-approved options for chronic migraine prevention, not the only one. Others include:

• Oral preventives such as topiramate, propranolol, and amitriptyline, generally tried first
• CGRP inhibitors, a newer class of injectable or oral medications approved specifically for migraine prevention
• Botox (onabotulinumtoxinA), injected roughly every 12 weeks at defined sites across the head and neck

These options are not mutually exclusive. Some patients use Botox alongside a CGRP inhibitor or an oral preventive, under a physician's direction.

Benefits, Limitations and Risks

In the PREEMPT trials, Botox reduced headache days by an average of 9.0 per 28-day period, compared with 6.7 for placebo — a statistically significant but modest difference, not a cure (Dodick et al., 2010). It does not eliminate migraines for most patients, and the full benefit typically is not clear until after the second treatment cycle, roughly six months in.

Reported side effects include neck pain, the most common at around 9% of patients; a temporary increase in headache days after the first injection cycle in roughly 4 to 5%; and eyelid or brow drooping, known as ptosis, in around 4%, which resolves as the toxin wears off. Less commonly, the toxin can spread beyond the injection site and cause difficulty swallowing or breathing, which requires prompt medical attention (Cleveland Clinic, n.d.; Mayo Clinic Press, n.d.). These risks, and the realistic range of benefit, should be part of any pre-treatment discussion.

What the Evidence Shows

The evidence does establish that, in adults meeting the chronic migraine definition, Botox produces a statistically significant reduction in headache-day frequency compared with placebo, sustained across repeated treatment cycles in the PREEMPT clinical program (Dodick et al., 2010).

The evidence does not establish that Botox works for episodic migraine, defined as fewer than 15 headache days a month, that it eliminates migraines entirely, or that any individual patient will respond the way the trial averages suggest. Some patients see a meaningful reduction in headache days; others see little change, and that difference generally is not predictable in advance.

Recovery and Next Steps

There is no real recovery period. The injections take about 15 to 20 minutes, delivered across roughly seven sites in the forehead, temples, back of the head, neck, and shoulders, and most people return to normal activity the same day. Mild soreness or bruising at the injection sites can occur.

Because the full effect builds over the first one to two cycles, the standard next step is a follow-up appointment around 12 weeks later to assess response and decide whether to continue, adjust dosing, or add another preventive.

Orlando Considerations

For migraine-specific Botox, look for a physician who follows the FDA-labeled injection protocol of 155 units across 31 sites, rather than a cosmetic-only injector, since the migraine protocol differs from cosmetic dosing and placement. Most insurers require documentation of headache frequency and prior preventive medications tried before authorizing coverage — bringing a headache diary to the first visit speeds that process along.

Frequently Asked Questions

Is Botox for migraine the same as cosmetic Botox?

It is the same drug, onabotulinumtoxinA, but a different protocol. The FDA-approved migraine regimen uses 155 units injected across 31 sites in seven head and neck areas, compared with the smaller doses used for cosmetic lines and wrinkles (American Migraine Foundation, n.d.).

How long does it take to work for migraine?

Some patients notice a change after the first cycle, but clinical trial data point to the full effect typically emerging after the second treatment cycle, around six months in (Dodick et al., 2010).

Does insurance cover Botox for migraine?

Often, yes, for documented chronic migraine after other preventives have been tried, unlike cosmetic Botox, which insurance does not cover. Prior authorization requirements vary by plan.

What if Botox doesn't fully stop my migraines?

Botox reduces headache frequency for many patients but does not eliminate migraines for most. If the response is limited, a physician may adjust the approach, add a CGRP inhibitor or oral preventive, or investigate other causes of frequent headache.

Is Botox for migraine safe?

It is generally well tolerated in clinical trials, with side effects that are usually mild and temporary — most commonly neck pain or eyelid drooping. Rare but serious reactions, including difficulty swallowing or breathing, have been reported and require prompt medical attention (Cleveland Clinic, n.d.).

This article is for general education and does not replace personalized medical advice. Individual results vary. Treatment options are discussed after a medical evaluation.

Medically reviewed by Kenny Chantasi, DO.

References

Allergan, Inc. (2011). BOTOX (onabotulinumtoxinA) prescribing information [Package insert]. U.S. Food and Drug Administration. https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/103000s5236lbl.pdf

American Migraine Foundation. (n.d.). Botox for migraine. Retrieved September 10, 2026, from https://americanmigrainefoundation.org/resource-library/botox-for-migraine/

Cleveland Clinic. (n.d.). Botox for migraines: How it works, side effects & injection sites. Retrieved September 10, 2026, from https://my.clevelandclinic.org/health/treatments/botox-for-migraines

Dodick, D. W., Turkel, C. C., DeGryse, R. E., Aurora, S. K., Silberstein, S. D., Lipton, R. B., Diener, H.-C., & Brin, M. F. (2010). OnabotulinumtoxinA for treatment of chronic migraine: Pooled results from the double-blind, randomized, placebo-controlled phases of the PREEMPT clinical program. Headache: The Journal of Head and Face Pain, 50(6), 921–936. https://pubmed.ncbi.nlm.nih.gov/20487038/

Mayo Clinic Press. (n.d.). Mayo Clinic Q and A: Botox for migraines. Retrieved September 10, 2026, from https://mcpress.mayoclinic.org/migraine/mayo-clinic-q-and-a-botox-for-migraines/

Last medically reviewed: September 10, 2026

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• Botox in Orlando: What to Know Before Your First Treatment
• Botox vs Dysport Differences Explained
• Does Insurance Cover Botox?
• How Long Does Botox Last?

More questions answered on the PrimeCell patient blog, or see frequently asked questions.

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PrimeCell is a physician-led practice in Orlando. Candidacy for any procedure is determined at an in-person evaluation.