Amlodipine benzenesulfonate can exert antihypertensive effect 1~2 hours after taking the drug, and the effect can last for 24 hours. Amlodipine benzenesulfonate belongs to the calcium antagonist, 1~2 hours after oral administration of the drug can play a role in lowering blood pressure, but it takes 6~12 hours for the concentration to reach its peak, and the effect of one dose of the drug can last for 24 hours. However, it takes 7-8 days for amlodipine benzenesulfonate to exert its antihypertensive effect in a sustained and stable manner. Amlodipine benzenesulfonate is a western prescription drug, the adverse effects of the drug are lower extremity edema, tachycardia, flushing, dry stools, etc. It is forbidden for patients who are allergic to the components of the drug, or who have low blood pressure. Clinical selection of amlodipine benzenesulfonate to lower blood pressure, according to the characteristics of the patient’s condition to choose the right drug, and under the guidance of the physician to use the drug, pay attention to the adverse effects of the drug in the process of taking the drug.