The generic name for Betaloc is metoprolol tartrate; 25 mg of metoprolol tartrate is usually taken 1 to 2 times a day, with specific usage and dosage depending on the indication for treatment. Metoprolol tartrate is a beta-adrenergic receptor blocker, clinically, it is commonly used in the treatment of angina pectoris, myocardial infarction, hypertension, hypertrophic cardiomyopathy, cardiac arrhythmia, hyperthyroidism and other diseases. For the treatment of hypertension, 100~200mg/dose, 1~2 times a day. For the treatment of acute myocardial infarction, 25~50mg/dose every 6~12 hours for 24~48 hours, then 50~100mg/dose orally twice a day. For the treatment of angina pectoris 50~100mg/dose, 2 times a day. For the treatment of arrhythmia, hypertrophic cardiomyopathy, and hyperthyroidism, usually 25～50mg/dose 2～3 times a day, or 100mg/dose 2 times a day. The main adverse effects of metoprolol tartrate include fatigue, headache, dizziness, coldness in the extremities, bradycardia, abdominal pain, nausea, vomiting, diarrhea and constipation; it is contraindicated in patients with hypersensitivity to the drug components, in patients with cardiogenic shock, in patients with morbid sinus node syndrome, in patients with second- and third-degree atrioventricular block, and in patients with acute myocardial infarction. It should be noted that the dosage of metoprolol tartrate should be adjusted frequently according to the condition, so when using the drug, it must be carried out under the guidance of specialists, and make relevant monitoring records and regular follow-up.