Betaloc, a drug in the beta-blocker class, can be used to treat hypertension, angina pectoris, myocardial infarction, hypertrophic cardiomyopathy, aortic coarctation, cardiac arrhythmia, hyperthyroidism, cardiac neuroses and other diseases. Betalucil, also known as metoprolol tartrate, belongs to the β-blocker, which can selectively block the β1 receptor to achieve the effect of slowing down the heart rate, weakening myocardial contraction, and lowering blood pressure. It should be noted that the use of this drug is contraindicated in patients with cardiogenic shock, patients with sick sinus node syndrome, patients with II and III degree atrioventricular block, patients with symptomatic bradycardia, and patients with hypotension. In addition, the use of this drug is contraindicated in patients with decompensated heart failure, in patients receiving continuous or intermittent treatment with beta agonists with orthostatic potentiation, and in patients suspected of having an acute myocardial infarction. Adverse reactions such as fatigue, headache, bradycardia, abdominal pain, and nausea may occur with the use of this drug. If you need to use Betalucil, do so under the supervision of a physician.