heart and blood vessel disorders
Drug Treatment of Coronary Artery Disease
Calcium channel blockers
Calcium channel blockers prevent blood vessels from narrowing (constricting) and can counter coronary artery spasm. All calcium channel blockers reduce blood pressure. Some of these drugs, such asverapamilanddiltiazem, may also reduce the heart rate. This effect can be useful to many people, especially those who cannot take beta-blockers or who do not get enough relief from nitrates. 