<prompt> Vigabatrin acts through -decreasing GABA uptake at synaptic cleftIncreasing GABA uptake at synaptic cleftGABA transaminase inhibitorGABA transacetylase inhibitor  <response>: Ans. is c i.e., GABA transaminase inhibitor Vigabatrin g vinyl GABA It is a newer anti - convulsant which is an inhibitor of enzyme GABA transaminase; it thus increases GABA concentration at synapse. It is mainly used in patients with refractory epilepsy visual field defects and behavioural changes restricts its use. 