Nifedipine controlled-release tablets have the effect of dilating peripheral blood vessels and coronary arteries, improving myocardial ischemia in coronary heart disease, lowering blood pressure, and treating coronary heart disease and chronic stable angina. Nifedipine controlled release tablets are calcium channel blockers, which can dilate coronary arteries, reduce the tension of coronary artery smooth muscle, prevent vasospasm, and also increase peripheral resistance and blood pressure. Clinically, it is mainly used in the treatment of primary hypertension, coronary heart disease and chronic stable angina. When patients are treated with nifedipine controlled-release tablets, adverse reactions such as edema and headache may occur. During the period of medication, blood pressure should be monitored regularly, attention should be paid to the condition of non-variation, and the emergence of serious or persistent discomfort should be promptly consulted. In addition, patients should strictly comply with the dosage prescribed by the doctor, and should not increase the dosage without authorization, so as to avoid the overdose of drugs and the occurrence of blood pressure drop, coma and other serious symptoms. Nifedipine controlled-release tablets should be prohibited for cardiogenic shock, within 20 weeks of pregnancy and lactating women. In addition, if Nifedipine Controlled-Release Tablets are to be used together with other drugs, the doctor should be consulted in advance to avoid drug interactions. Nifedipine controlled-release tablets are prescription drugs, patients should follow the doctor’s instructions to use medication, not to use on their own, so as not to cause damage to the body.