This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Which antiepileptic drug does not act inhibition of sodium channels? \nSelect and explain. \nA. Vigabatrin, B. Carbamazepine, C. Lamotrigine, D. Pheriytoin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]