Topiramate. Molecular model of the anti-epilepsy drug Topiramate (brand name Topamax), an anticonvulsant drug that decreases abnormal excitement in the brain. It is prescribed for a variety of conditions, but it is mainly used to treat epilepsy in both children and adults and is indicated for the treatment of Lennox-Gastaut syndrome in children. The drug is also used in the prevention of migraines and headaches. Possible side effects of Topiramate include drowsiness, weight loss, coordination problems, and fatigue. Atoms, represented as tubes, are colour-coded: carbon (green), hydrogen (white), nitrogen (blue), sulphur (yellow) and oxygen (red).