The generic name of Betalucil is Metoprolol Tartrate (Succinate) Tablets, and the effect of taking it before or after meals is not particularly significant, and most of the clinical requirements are to apply it on an empty stomach before meals. Metoprolol tartrate (succinate) tablets before meals on an empty stomach, can make the drug in the day the efficacy of the drug is maintained in a stable state, try to avoid and food together, easy to cause utilization increased, resulting in bradycardia symptoms. Indications: It is mainly used to control hypertension, angina pectoris, myocardial infarction, hypertrophic cardiomyopathy, aortic coarctation, arrhythmia, hyperthyroidism, and cardiac neurosis. Adverse reactions: fatigue, headache, dizziness, cold extremities, bradycardia, palpitations, diarrhea, nausea, vomiting, constipation, etc. may occur after use. Contraindications: cardiogenic shock, sick sinus node syndrome, second- and third-degree sinusoventricular block, severe heart failure, those who are receiving b-agonist therapy; suspected myocardial infarction is contraindicated; there is a significant bradycardia, hypotension is contraindicated; there is a serious peripheral vascular disease is contraindicated; allergic to the product is contraindicated. The occurrence of serious cardiac rhythm abnormalities, gastrointestinal reactions or systemic allergic symptoms during the use of the drug, you need to stop using the drug in a timely manner, seek medical attention and observation.