The generic name of Betalucel is Metoprolol. It is recommended to take the drug on an empty stomach before meals to increase the proportion of drug absorption and utilization. However, in case of severe gastrointestinal adverse effects serious, it can be taken after meals. Metoprolol is recommended to be taken on an empty stomach before meals to increase the degree of drug utilization if there are no associated adverse reactions. If symptoms such as abdominal pain, nausea, vomiting, diarrhea, etc. occur and are clearly an adverse drug reaction, it can be taken after meals. Metoprolol is used in the treatment of hypertension, angina pectoris, myocardial infarction, hypertrophic cardiomyopathy, aortic coarctation, arrhythmia, hyperthyroidism, cardiac neurosis and so on. In recent years, it is also used in the treatment of heart failure, which should be used under the guidance of experienced physicians. Adverse reactions: cold extremities, bradycardia, palpitations, abdominal pain, nausea, vomiting, diarrhea and constipation, etc. ContraindicationsPregnant women, women in labor and delivery should not use. The presence of hypotension, cardiogenic shock, etc. is prohibited. Sick sinus node syndrome, high conduction block and other cardiac arrhythmias are prohibited. Incompensated heart failure is prohibited. The drug is contraindicated in case of hypersensitivity to the components of the drug. The drug needs to be used under the guidance of a clinician, unauthorized use is prohibited.