<prompt> Vigabatrin acts by:GABA receptor inhibitorGlutamate receptor inhibitorGABA transaminase inhibitorGABA transport inhibitor  <response>: Ref: Katzung, 14th ed. pg. 431-32 VIGABATRIN is GABAergic drug acts by inhibiting enzyme GABA transaminase. This enzyme inhibition causes increased level of GABA in the neuron. Use: DOC in infantile spasm Tuberous sclerosis Simple and complex partial seizure Contraindicated in absence seizure, Myoclonic seizure, Pre-existing visual field defect. Side effect: Visual field defect due to peripheral retinal atrophy, weight gain, amnesia GABA uptake transport inhibitor: TIAGABINE 