This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epilepsy, Subject name: Pharmacology
Which antiepileptic drug does not act via inhibition of sodium channels? 
Select and explain. 
A. Vigabatrin, B. Carbamazepine, C. Lamotrigine, D. Phenytoin
A: Vigabatrin
Answer: A: Vigabatrin 
Explanation: Ans. (A) Vigabatrin(Ref: KDT 8/e p448)Vigabatrin inhibits the metabolism of GABA by inhibition of GABA transaminase enzyme. It has no effect on Na+ channels.