Felodipine extended-release tablets is a kind of drug with vasodilator effect, which can be used in the treatment of coronary heart disease and hypertension. Felodipine extended-release tablets belong to the calcium antagonist, for the peripheral arterial vasculature and coronary arteries have the effect of dilation, the main clinical indications are hypertension and coronary heart disease, in the lowering of blood pressure at the same time can increase the blood supply of coronary arteries. The adverse effects of felodipine extended-release tablets include lower extremity edema, constipation, flushing, tachycardia, etc. In the process of taking the drug, we should pay attention to the adverse effects of the drug, allergic to the components of the drug, low blood pressure, severe aortic stenosis, lactation, pregnancy, women are prohibited. When choosing felodipine extended-release tablets for antihypertensive treatment, it is necessary to use the drug under the guidance of a physician and choose the appropriate dosage.