Effect of Atropine and Methiamide on Vagally Induced Gastric Acid Secretion and Gastrin Release in Anesthetized Cats

Abstract
Gastrin release and HCl secretion was induced by electrical vagal stimulation in anesthetized cats. Both atropine (0.1-0.3 mg/kg) and methiamide (4-20 mg/kg) inhibited the HCl secretion (by .apprx. 60 and .apprx. 80%). Neither atropine (0.2-2 mg/kg) nor methiamide (20 mg/kg) inhibited the vagally induced gastrin release. Possible explanations of the atropine resistance of the vagal gastrin release mechanism are discussed.