phenytoin

An anticonvulsant drug, C₁₅H₁₂N₂O₂, used also in the form of its sodium salt to treat epilepsy.

An anticonvulsant drug, 5,5-diphenylimidazolidine-2,4-dione, used in the treatment of epilepsy

an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative