Pharmacology General cb7ae76e Most toxic antiepileptic drug is ? A Phenytoin B Valproate C Carbamazepine D Lamotrigine High-Yield Explanation Ans. is'c' i.e., Carbamazepine(Ref: <a href=" in a pubmed indexed journal, regarding toxicity of anticonvulsant drugs shows answer is carbamazepine.</li>40.0 % toxicity.