The antihypertensive effect of felodipine extended-release tablets is stable and can be used in the treatment of most hypertension, but the efficacy of the drug varies to some extent among different patients. Felodipine extended-release tablets belong to the calcium antagonist class of antihypertensive drugs, peripheral arterial vessels and coronary arteries have a dilating effect, can be used in the treatment of hypertension and coronary heart disease patients, especially when the two diseases exist in combination, it is more suitable for the choice of such drugs felodipine extended-release tablets. Felodipine extended-release tablets are suitable for most of the patients with high blood pressure, the effect of lowering blood pressure is stable, for patients with severe hypertension need to be used in conjunction with other drugs, but different patients have different reactions to the drug, and it is not suitable for the treatment of all patients with high blood pressure. The adverse reactions of felodipine extended-release tablets include dry stools, lower limb edema, tachycardia, facial flushing, etc. It is forbidden for patients with allergy to the drug components, severe aortic stenosis and cardiogenic shock. Felodipine extended-release tablets in the clinical treatment of hypertension, should be used under the guidance of a physician.