noun. a drug (trade names Calan and Isoptin) used as an oral or parenteral calcium blocker in cases of hypertension or congestive heart failure or angina or migraine.
1. Noun, singular or mass Interactions may occur with verapamil and diltiazem, and grapefruit juice may cause problems as well. 2. Noun, plural Examples of calcium channel blockers include verapamil**, diltiazem and nifedipine 1.
