<prompt> The antiepilectic drug which does not produce enzyme induction isPhenobarbitoneSodium valproatePhenytoin sodiumCarbamazepine  <response>: The four major enzyme-inducing AEDs carbamazepine, phenytoin, phenobarbital and primidone stimulate the metabolism and reduce the serum concentration of most other concurrently administered AEDs, most notably valproic acid , tiagabine , ethosuximide , lamotrigine , topiramate , REF : KD TRIPATHI 8TH ED. 