Direct evidence indicating that a GABA-mimetic stimulates acid secretion through central mechanisms.

Acid secretagogue effects of central and peripheral baclofen were compared in the rat. Intravenously (0.1-1.0 mg/kg) and intracerebroventricularly (0.1-1.0 micrograms) administered baclofen augmented acid output to the same degree in a dose-dependent manner. GABA microinjected into the lateral hypothalamus (200 and 400 micrograms) significantly increased acid output. These support the proposal that baclofen stimulates acid secretion through central mechanisms and also the possible role of GABA in central regulation mechanisms of acid secretion.