Betalucil extended release tablets, known generically as Metoprolol succinate extended release tablets, can be broken and taken, but not chewed or crushed. Metoprolol succinate extended-release tablets belong to the beta-blocker, because of the extended-release technology, the drug can be slowly released after taking the drug, 24 hours to maintain the efficacy of the drug, once a day to take the drug can be, preferably in the morning to take, can be broken to take but can not be chewed or crushed. Metoprolol succinate extended-release tablets belong to the western prescription drugs, clinically used in the treatment of hypertension and coronary heart disease, at the same time can be used for tachyarrhythmia control. The adverse reactions of Metoprolol Succinate Extended-Release Tablets include dizziness, bradycardia, nausea, cold extremities, hypotension, dyspnea, etc. It is contraindicated in patients with allergy to drug components, II degree III degree atrioventricular block, cardiogenic shock, severe bradycardia, hypotension, and bronchial asthma. Metoprolol succinate extended-release tablets should be used under the supervision of a physician to choose the appropriate dose and mode of administration.