575 IntroductIon Anti-epileptic medications can be divided into two major groups. The traditional antiepileptic drugs, which were released for use prior to 1978, are Phenobarbital, Phenytoin, Primidone, Clonazepam, Ethosuximide, Carbamazapine and Valproate. There was a 15-year period from 1978 to 1993, when no new antiseizure drug was approved for use. Since 1993, an additional eight new anti-e...