The generic name of the drug, Betalox Extended-Release Tablets, is Metoprolol Tartrate Extended-Release Tablets, and one and a half tablets a day can be broken up and taken with warm boiled water. Metoprolol succinate extended-release tablets, clinically, are mainly used for the treatment of hypertension, angina pectoris, myocardial infarction, heart failure and other diseases. Different types of diseases, the specific use of drugs is also different. Patients can choose to take betalactam extended-release tablets one and a half a day can be broken by hand in the morning, and served with warm boiled water. Taking drugs need to pay attention to can not chew, crushed to take, at the same time pay attention to daily diet scientific nutrition. Symptomatic bradycardia or hypotension, cardiogenic shock, allergy to the drug is prohibited. Taking the drug may cause slow heart rate, lower blood pressure, nausea, arthralgia and other adverse reactions, patients need to follow the doctor’s instructions for proper use, such as the emergence of adverse reactions in time to consult a doctor. The dosage of the drug need to listen to the doctor’s advice to take correctly, to avoid private use of the drug adverse reactions.