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Meaning of calcium blocker

cal'cium block"er

Pronunciation: [key]
— Pharm. Pharm.
  1. any of a group of drugs that prevent the influx of calcium into excitable tissues such as smooth muscle of the heart or arterioles, used in the treatment of angina, hypertension, and certain arrhythmias. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.