Isoptin

Isoptin (Verapamil Hydrochloride): Comprehensive Clinical Monograph for the Management of Hypertension, Angina Pectoris, and Cardiac Arrhythmias 1. Introduction: What is Isoptin? Its Role in Modern Cardiology Alright, let’s cut through the noise. Isoptin is the brand name for verapamil hydrochloride, and it belongs to the class IV calcium channel blockers—specifically, the phenylalkylamine subclass. This distinction matters because unlike dihydropyridines (amlodipine, nifedipine) which are primarily vasoselective, Isoptin has significant negative chronotropic and dromotropic effects on the sinoatrial and atrioventricular nodes.