Dihydropyridine calcium antagonists are used to dilate the smooth muscle of arteries and reduce peripheral resistance, and are used in the treatment of hypertension and coronary heart disease. Dihydropyridine calcium antagonists belong to a type of antihypertensive drugs, which contains a relatively large number of drugs, common drugs are amlodipine, nimodipine, nicardipine and lasidipine and other drugs, these drugs can dilate the smooth muscle of the arteries, reduce peripheral resistance, so used in the treatment of hypertension, coronary heart disease, cardiac arrhythmia and other diseases. Dihydropyridine calcium antagonists are not to be used privately and need to be used under medical supervision. Common adverse reactions of dihydropyridine calcium antagonists are headache, flushing, tachycardia, etc. Contraindications are severe aortic stenosis and hypersensitivity to calcium antagonists in patients prohibited and so on.