Bayxin Tong is composed of nifedipine controlled-release tablets, which are capable of exerting antihypertensive effects about 6 hours after the first dose. Nifedipine controlled-release tablets are calcium antagonists, the main indications are hypertension, coronary heart disease and stable angina pectoris, due to the use of extended-release technology, the release of the drug is relatively slow, it takes about 6 hours after the first dose of the drug to reach a stable concentration of blood pressure, to play a role in lowering blood pressure, and the efficacy of the drug lasts for 24 hours or so, once a day to take the drug can be. Nifedipine controlled-release tablets are prescription drugs, the adverse effects of the drug are tachycardia, lower limb edema, dry stools, facial flushing, etc. For the drug component allergy, cardiogenic shock, there is a KOCK vesicle, within 20 weeks of pregnancy, breastfeeding women and patients taking rifampicin are prohibited. Patients with hypertension should choose nifedipine controlled-release tablets under the guidance of a physician, choose the appropriate dose, do not self-medicate to avoid adverse consequences.