The efficacy of nifedipine tablets mainly includes the following aspects: First, the role of lowering blood pressure, nifedipine tablets as a kind of antihypertensive drugs, has a strong antihypertensive effect, and the effect is rapid. Especially for the elderly, the effect of lowering blood pressure is better, and for patients with hypertension who often drink alcohol also has a significant antihypertensive effect; Second, improve the coronary spasm, there are some coronary heart disease mechanism is due to coronary spasm caused by insufficient blood supply to the heart, calcium antagonists can effectively lift the coronary spasm, restore blood supply to the heart muscle, in order to play a role in relieving angina; Third, the role of anti-atherosclerosis, because calcium is involved in the pathological process of atherosclerosis As calcium is involved in the pathological process of atherosclerosis, nifedipine can reduce the inward flow of calcium ions and help prevent the occurrence of atherosclerosis; iv.