Which antiepileptic drug does not act inhibition of sodium channels?: (A) Vigabatrin, (B) Carbamazepine, (C) Lamotrigine, (D) Pheriytoin
Answer is A. It is an inhibitor of GABAtransaminase, the enzyme which degrades GABA. Anticonvulsant action may be due to increase in synaptic GABA concentration Ref: KD TRIPATHI 8thh ed.