For the most part, felodipine extended-release tablets are suitable for all types of hypertensive patients, especially those with stable angina. However, felodipine extended-release tablets are a calcium channel blocker with its contraindications and adverse effects. 1. All types of hypertension: Felodipine extended-release tablets have a selective inhibitory effect on the smooth muscle of blood vessels, which can reduce the resistance of peripheral vasculature, so that blood pressure can be reduced. It is generally applicable to patients with all types of hypertension. 2. Stabilized angina: Felodipine extended-release tablets are usually able to dilate coronary artery blood vessels, which can increase the perfusion and oxygen supply of cardiac myocytes in the heart, and at the same time reduce myocardial oxygen consumption, which can relieve the spasm of blood vessels, and is suitable for the treatment of stabilized angina pectoris. 3. Contraindications: patients with allergic reaction to the components of felodipine extended-release tablets, severe hypotension, aortic stenosis are prohibited. 4. Adverse reactions: some patients may have ankle edema. Facial flushing, headache, panic, dizziness, fatigue and other symptoms may occur. It is recommended to use the drug under the supervision of a physician.