| Noun | 1. | calcium-channel blocker - any of a class of drugs that block the flow of the electrolyte calcium (either in nerve cell conduction or smooth muscle contraction of the heart); has been used in the treatment of angina or arrhythmia or hypertension or migraineCardizem, diltiazem - a calcium blocker (trade name Cardizem) used in treating hypertension or angina or heart failure nifedipine, Procardia - calcium blocker (trade name Procardia); appears to increase the risk of recurrent heart attacks Calan, Isoptin, verapamil - 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 | |