Betalucil, also known as metoprolol, is taken by mouth two to three times a day for regular tablets and once a day for extended-release tablets, depending on your doctor’s instructions. Metoprolol is a beta-blocker, clinically used in the treatment of patients with coronary heart disease, and has the effect of lowering blood pressure, hypertension also belongs to the indications of Metoprolol. Metoprolol is divided into ordinary tablets and extended-release tablets, ordinary tablets work faster, but the duration of action is shorter, you need to take the drug 2~3 times a day. Extended-release tablets last longer and can be taken once a day. When taking metoprolol, you should start with a small dose, observe the therapeutic effect of the drug as well as adverse reactions, monitor the heart rate and blood pressure, and gradually increase the dose of the drug. The adverse reactions of metoprolol include stomach discomfort, constipation, dizziness, hypotension, bradycardia, dyspnea, cold limbs and so on, and allergy to the components of the drug, bronchial asthma, severe bradycardia, cardiogenic shock, and second-degree third-degree AV block are prohibited for patients. Patients are prohibited. The exact dosage should be used under the guidance of a cardiologist.