Nifedipine controlled-release tablets are usually taken for one day to normalize blood pressure. Clinically, nifedipine controlled-release tablets can diastole vascular smooth muscle, reduce myocardial metabolism and oxygen consumption, and at the same time can make the peripheral resistance lower. The systolic and diastolic blood pressure are reduced, reduce the afterload of the heart, in the clinic is mainly used for various types of hypertension and angina pectoris treatment. Nifedipine controlled-release tablets are rapidly absorbed through the gastrointestinal tract after taking, and the time to reach the peak blood concentration is about 1.6~4 hours, while the time to maintain the minimum effective blood concentration will be up to 12 hours. Therefore, after taking the drug, the blood pressure can be reduced to normal within one day. However, it is not possible to stop taking the drug, and it needs to be taken for a long time. After taking nifedipine controlled-release tablets, you may experience symptoms such as flushing, nausea, loss of appetite and other discomforts. Pregnant women and children should be prohibited from taking it, and secondly, it should be used with caution for people with low blood pressure, severe aortic stenosis, and liver and kidney insufficiency during the process of taking it. Due to the condition of the need to take nifedipine controlled release tablets for treatment, it is recommended to consult the cardiovascular internal medicine department, after the doctor’s comprehensive assessment of the condition to determine the dosage of the drug, and learn the precautions.