Nifedar is also known as nifedipine extended-release tablets.2 It comes in a 20mg dose in one tablet, and when taken orally, you should not break and take half of the tablet, because when the nifedipine extended-release tablets are broken, the molecular structure of the medication is destroyed, and it does not work as an extended-release. It is mainly used to treat various kinds of high blood pressure and angina pectoris. Firstly as a blood pressure lowering drug, the usual oral dosage is 1-2 tablets/dose, 2 times/day. Secondly as a drug for angina pectoris, especially for variant angina pectoris, because it relieves and prevents coronary artery spasms, inhibits myocardial contractility and reduces myocardial oxygen consumption. In addition this drug can not be broken, except that it needs to be swallowed whole, and it can not be chewed. Patients with low blood pressure, as well as patients with hepatic and renal insufficiency, need to be used with caution, pregnant women and women breastfeeding patients are prohibited.