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Does Topamax (topiramate) cause hair loss?

Medically reviewed by Leigh Ann Anderson, PharmD. Last updated on March 13, 2025.

Official Answer by Drugs.com

Yes, Topamax (topiramate) has been shown to cause hair loss (alopecia) in studies, but it is not a common side effect.

Hair loss has been reported in 1% to 4% of children ages 6 to 16 years of age, and in 3% to 4% of patients older than 16 years of age.

Higher daily doses (400 mg/day) of topiramate were associated with greater rates of hair loss than lower doses (50 mg/day) in both age groups.

Hair loss with topiramate has also been reported in case reports in the scientific literature.

Hair loss is a common side effect reported with other antiepileptic agents such as valproic acid and carbamazepine, and may cause cosmetic, social and compliance consequences for patients.

What has the FDA approved topiramate to treat?

Topiramate is used to help prevent seizures, either used alone or with other seizure medicines, in certain forms of epilepsy in patients 2 years of age and older. It is approved for migraine prevention in patients 12 years and older.

Common brand names for topiramate or extended-release topiramate include:

Generic topiramate is available as an oral tablet, capsule or extended-release capsule in various strengths and may be less expensive than brand names. If preferred, ask your doctor if a generic formulation is possible for your condition.

Related questions

Which side effects can I expect with topiramate?

The most common side effects (≥10% and more frequent than placebo) reported in epilepsy studies in both adults and children include:

In migraine studies in adults and children, side effects (incidence ≥5% and more frequent than placebo) were:

Related: View topiramate side effects, warnings and drug interactions (in more detail)

This is not all the information you need to know about topiramate for safe and effective use and does not take the place of talking to your doctor about your treatment. Review the full patient information for topiramate and discuss this information and any questions you have with your doctor or other health care provider.

References

Read next

Best time to take Topamax (topiramate): morning or night?

Topamax (topiramate) is approved to be taken alone or with other medicines to control certain types of seizures and for the prevention of migraine headaches. When taken twice a day, the medicine is usually taken in the morning and evening. When increasing your dose at the start of treatment, your dose may be taken only at night for one week. Follow your healthcare providers directions exactly. Topamax can cause drowsiness and dizziness, so do not drive or perform other hazardous activities until you are aware of its effects.

Continue reading

Topamax for migraines: how long should you take it?

You can usually stay on Topamax (topiramate) to help prevent your migraine headaches as long as the treatment is needed and remains safe for you. You and your doctor will decide how long you stay on treatment. This will be based on how well it is working for you and any side effects you may experience. Continue reading

How long does it take for Topamax to start working?

It may take 8 to 12 weeks for you to see the full effect of Topamax on your migraine headaches. In clinical studies, some people had fewer headaches after 4 weeks of treatment. In the treatment of epilepsy, Topamax is also started slowly and the dose is increased over a 6-week period. Continue reading

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