Nifedipine tablets belong to the calcium channel blocker, it has obvious vasodilator effect, can reduce the patient’s blood pressure, and also can play the role of anti-angina. However, it can reflexively excite the sympathetic nerves, so some patients may experience rapid heartbeat during the process of taking this drug. This drug is mainly used for the treatment of hypertension, angina pectoris and peripheral vascular diseases, such as Raynaud’s syndrome. Patients are generally advised to choose the extended-release dosage form or the controlled dosage form, which is relatively more stable in terms of blood concentration and has a longer duration of lowering blood pressure. In the case of nifedipine tablets, which are short-acting preparations, patients should take them at least twice a day, which may also cause high and low blood pressure.