Metoprolol tartrate tablets are a beta-blocker commonly used in clinical practice, especially in cardiovascular medicine, which can block sympathetic nerve activity, slow down heart rate, and at the same time can lower blood pressure, and are mostly used clinically for the treatment of hypertension, angina pectoris, arrhythmia, hyperthyroidism and other diseases. In the process of taking it, the following points should be noted: 1. Pay attention to the changes in heart rate, the drug has the effect of suppressing heart rate, and after taking it, it is easy to have a slow heart rate or even fainting. 2. Patients with chronic obstructive pulmonary disease should be used with caution, because metoprolol can lead to bronchial smooth muscle contraction and induce the onset of bronchial asthma, and patients with chronic obstructive pulmonary disease are prone to respiratory distress after using it. 3. The process of stopping the drug should Gradually reduce the dosage until it is discontinued, and not directly stop it suddenly.