Calcium-channel-blocker definition

Any of a class of drugs that inhibit the movement of calcium ions across the cell membranes of cardiac and smooth muscle and are used to treat cardiovascular disorders.

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.

Any of a class of drugs that inhibit the movement of calcium ions across the cell membranes of cardiac and smooth muscle and are used to treat cardiovascular disorders.