Topiramate, brand name Topamax, belongs to a class of drugs known as Carbonic anhydrase inhibitor anticonvulsants. Topiramate is used in medicine to treat seizures in certain patients. Topiramate may be used alone or in combination with other medication. Topiramate may be also be prescribed by physicians to prevent migraines. Topiramate mainly functions by affecting chemicals in the brain that assist to reduce seizure activity and prevent migraines.