What is Topamax? Topamax is a brand of topiramate used under certain circumstances to: Prevent migraine headaches in adults as well as children ages 12 years and older. Treat epilepsy* in adults as well as children ages 2 years and older with: o          partial-onset seizures o          generalized tonic-clonic seizures o          seizures linked to Lennox-Gastaut syndrome […]