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calcium channel blocker definition

calcium channel blocker

any of a class of drugs, including nifedipine, diltiazem, and verapamil, that relax vascular and other smooth muscle tissue by preventing calcium ions from entering their cells, used to treat headaches, high blood pressure, angina pectoris, heart failure, etc.
sometimes written calcium-channel blocker cal′cium-chan′nel blocker

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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