<prompt> Which of the following antiepileptic agent does not act Na channel modulation?VigabatrinPhenytoinValproateLamotrigne  <response>: 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 8TH ED. 