- calcium blocker, 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 migraine
--1 is a kind of medicine, medication, medicament, medicinal drug
--1 has particulars:diltiazem, Cardizem; nifedipine, Procardia; verapamil, Calan, Isoptin