Norvasc blocks the transport of calcium into the smooth muscle cells lining the coronary arteries and other arteries of the body. In a class of medications called calcium channel blockers. Norvasc is used for the treatment and prevention of angina resulting from coronary artery spasm. Norvasc is used for the treatment and prevention of angina resulting from coronary artery spasm. Norvasc blocks the transport of calcium into the smooth muscle cells lining the coronary arteries and other arteries of the body. Amlodipine is used to treat high blood pressure or angina. Amlodipine controls high blood pressure or angina.