Nifedipine extended-release tablets is a commonly used clinical drug, the main treatment of diseases include the following: 1, hypertension, as a calcium antagonist can prevent extracellular calcium ions into smooth muscle cells, with the effect of diastolic blood vessels, so as to achieve the purpose of lowering blood pressure. The effect of hypotension on the elderly and patients with hypertension who often drink alcohol is better, and the drug has less effect on blood sugar, if the patient is combined with diabetes, often does not affect the metabolism of blood sugar. 2, treatment of coronary heart disease to improve blood supply to the heart, as a calcium ion antagonist can diastolic coronary arteries, increasing the blood supply to the heart. Especially for coronary artery spasm caused by angina pectoris or myocardial infarction effect is better, can effectively release the spasm of the coronary artery, restore the blood supply to the heart, to achieve the purpose of treatment of coronary heart disease.