The generic name of Baixin Tong Controlled-Release Tablets is Nifedipine Controlled-Release Tablets, which is a calcium antagonist that can reduce the entry of calcium ions into the cells through slow calcium channels, so as to achieve the efficacy of dilation of the large blood vessels, reduce the tension of coronary artery smooth muscle and prevent vasospasm. Nifedipine can specifically act on the smooth muscle cells of myocardium, coronary arteries and peripheral resistance vessels to dilate coronary arteries, and can also reduce the tension of coronary artery smooth muscle and prevent vasospasm, which can play a role in increasing the blood flow of stenotic blood vessels and improving the oxygen supply. Nifedipine can also reduce peripheral resistance and blood pressure by reducing the tension of arterial smooth muscle. This product is adapted to the treatment of hypertension, coronary heart disease, chronic stable angina pectoris. Adverse reactions such as edema and headache may occur after the use of this product. Heart failure and severe aortic valve stenosis in patients with systolic blood pressure <90mmHg, gastrointestinal tract severe stenosis of patients with caution, allergy in this product, cardiogenic shock, pregnancy within 20 weeks and lactating women are prohibited. Patients who want to use nifedipine controlled release tablets are advised to go to a regular hospital and consult a professional doctor to avoid blind use of medication.