Calcium antagonists include amlodipine, levamlodipine, felodipine, nifedipine, etc. There is no one drug that is best, it depends on which calcium antagonist is most suitable for the patient. Calcium ion antagonists are used to dilate peripheral blood vessels and have a dilating effect on coronary arteries, which has the effect of lowering blood pressure and improving blood supply to the myocardium. There are several varieties of calcium ion antagonists in the clinic, such as amlodipine, levoclodipine, etc., all of which can be used individually in the treatment of patients with hypertension, and they are especially suitable for patients with hypertension accompanied by coronary artery disease. Adverse effects of calcium antagonists include lower limb edema, dry stools, flushing, tachycardia, etc. They are contraindicated in patients with allergy to drug components, hypotension, and severe aortic stenosis. If you need to use calcium antagonists, they should be used under medical supervision.