Felodipine extended-release tablets are a kind of drugs for the treatment of hypertension, with the effect of dilating blood vessels. Felodipine extended-release tablets have an inhibitory effect on such calcium ions, which can limit the inward flow of calcium ions, so that the arterial vasculature plays a diastolic role, dilate the peripheral blood vessels, reduce blood pressure, the main clinical indications are hypertension and coronary heart disease. The main clinical indications are hypertension and coronary heart disease. Felodipine extended-release tablets is a kind of drug with slow-release technology, the drug can be released slowly, and the drug can be taken once a day to achieve stable blood pressure lowering effect, which belongs to the long-acting preparations. Adverse effects of felodipine extended-release tablets include flushing, constipation, lower extremity edema, tachycardia, etc. It is contraindicated for patients who are allergic to the drug components, hypotension, or cardiogenic shock. When taking felodipine extended-release tablets to lower blood pressure, use the drug under the guidance of a doctor.