<prompt> The antiepileptic drug which does not produce enzyme induction is -PhenobarbitoneSodium valproatePhenytoinPrimidone  <response>: Ans. is b i.e., Sodium valproate o Most of the anticonvulsants are enzyme inducers except valproate which is an inhibitor. Note : Valprate is an enzyme inhibitor overall but it induces metabolism of carbamazepine: Valproate and carbamazepine induce each other;s metabolism 