Isoguvacine hydrochloride (1,2,3,6-tetrahydro-4-pyridinecarboxylic acid hydrochloride) is a GABA receptor agonist. Isoguvacine hydrochloride binds to rat synaptic cortical membranes and activates α1β2γ2S, α2β2γ2S, α3β2γ2S, α5β2γ2S, and ρ1 subunit GABAA receptors.