Dilantin

Phenytoin, marketed under the brand name Dilantin among others, is one of the oldest and most widely utilized antiepileptic drugs in clinical neurology. It is a hydantoin derivative, classified as a Group 1 sodium channel blocker according to the ILAE classification. For decades, it has served as a cornerstone therapy for focal (partial-onset) and generalized tonic-clonic seizures. Its role extends beyond epilepsy into areas like neuropathic pain and certain cardiac arrhythmias, though these are secondary applications.