<prompt> Drug used in generalized tonic clonic seizure:PhenytoinNa ValproateCarbamazepineDiazepam  <response>: Ans. b Sodium ValproateRef. KDT 6th ed. 407-408 Given the choices the answer will be Na Valproate According to Harrisons 19th ed. the current recommendable drug for GTCS is LAMOTRIGINE 