gabazine gabazine gabazine (sr-95531) is a drug that acts as an antagonist at gabaa receptors. it is used in scientific research and has no role in medicine, as it would be expected to produce convulsions if used in humans. gabazinegabazine bromideclinical dataatc codenoneidentifiers iupac name 2-(3-carboxypropyl)-6-(4-methoxyphenyl)-2,3-dihydropyridazin-3-iminium bromide cas number104104-50-9 ypubchem cid107895chemspider4925141 yunii99460mg420chemblchembl303580 ycomptox dashboard (epa)dtxsid40908798 chemical and physical dataformulac15h18brn3o3molar mass368.226 g·mol−13d model (jsmol)interactive image smiles .c(=o)(o)cccn1n=c(c=cc1=)c1=cc=c(c=c1)oc inchi inchi=1s/c15h17n3o3.brh/c1-21-12-6-4-11(5-7-12)13-8-9-14(16)18(17-13)10-2-3-15(19)20;/h4-9,16h,2-3,10h2,1h3,(h,19,20);1h ykey:gfzhnfogcmeyta-uhfffaoysa-n y (verify) gabazine binds to the gaba recognition site of the receptor-channel complex and acts as an allosteric inhibitor of channel opening. the net effect is to reduce gaba-mediated synaptic inhibition by inhibiting chloride flux across the cell membrane, and thus inhibiting neuronal hyperpolarization. while phasic (synaptic) inhibition is gabazine-sensitive, tonic (extrasynaptic) inhibition is relatively gabazine-insensitive. gabazine has been found to bind to and antagonize α4βδ subunit-containing gabaa receptors, which may represent the ghb receptor.