Amlodipine benzenesulfonate is mainly used to lower blood pressure and treat angina pectoris. 1. Amlodipine benzenesulfonate is a calcium channel antagonist, which can inhibit the transmembrane entry of calcium ions into the vascular smooth muscle and myocardium, and can cause vasodilation as well as lowering the afterload of the heart, thus lowering blood pressure and treating angina pectoris. 2. The most important side effects of amlodipine benzenesulfonate are edema, headache, flushing, palpitations, etc. Most of them are related to the dose, and the symptoms will disappear after decreasing or stopping the dose. There may also be gastrointestinal symptoms such as nausea and vomiting, cardiac arrhythmia and hypotension. 3. The drug is heavily metabolized by the liver, and plasma clearance is greatly reduced in patients with hepatic insufficiency, so the dose should be increased slowly when used in patients with severe hepatic insufficiency. Amlodipine benzenesulfonate is a prescription drug and should be used under the supervision of a physician.