Baixin Tong is nifedipine controlled-release tablets, which should be purchased from regular pharmacies or medical institutions to avoid buying shoddy drugs. Nifedipine controlled-release tablets belong to the calcium antagonist, belong to the long-acting preparation, the main indication is hypertension, can be used for most of the patients with hypertension treatment, especially hypertension with coronary heart disease patients. When buying nifedipine controlled-release tablets, you should go to the regular drugstore or medical institutions to ensure that the drugs are genuine, and avoid buying drugs from irregular drugstores, so as not to buy shoddy or fake drugs, which will affect the treatment of hypertensive patients. The adverse reactions of nifedipine controlled-release tablets include palpitations, flushing, constipation, etc. They are contraindicated in patients with severe hypotension and allergy to drug ingredients. Patients with high blood pressure should take nifedipine controlled-release tablets orally under the guidance of a physician, and follow the doctor’s instructions to choose the appropriate dosage and time of taking.