Amlodipine is a dihydropyridine calcium-channel blocker, with a long duration of action, used for the treatment of hypertension and angina pectoris. Amlodipine influences the myocardial cells, the cells within the specialized conducting system of the heart, and the cells of vascular smooth muscle. Administration of Amlodipine results primarily in vasodilation, with reduced peripheral resistance, blood pressure and afterload, increased coronary blood flow and a reflex increase in coronary heart rate. This in turn results in an increase in myocardial oxygen supply and cardiac output.