Gallopamil (Methoxyverapamil), a methoxy derivative of Verapamil, is a phenylalkylamine calcium antagonist. Gallopamil acts on the vascular system and the heart and nodal structure[1]. Gallopamil inhibits acid secretion in a concentration-dependent manner with an IC50 of 10.9 μM[2]. Ca2+
[1]. Brogden RN, et al. Gallopamil. A review of its pharmacodynamic and pharmacokinetic properties, and therapeutic potential in ischaemic heart disease. Drugs. 1994 Jan;47(1):93-115. [2]. Sewing KF, et al. Calcium channel antagonists verapamil and gallopamil are powerful inhibitors of acid secretion in isolated and enriched guinea pig parietal cells. Pharmacology. 1983;27(1):9-14.