Metoprolol Tartrate Tablet is a beta-blocker, which is mainly used for the treatment of high blood pressure, angina pectoris, myocardial infarction, hypertrophic heart disease, arrhythmia and other diseases. Taking the drug may cause adverse reactions such as slowed heart rate, decreased blood pressure, dizziness, nausea and constipation. It is contraindicated in pregnant and breastfeeding women and may cause fetal growth retardation, or bradycardia and other adverse reactions. The use of this drug is contraindicated in hypotension, significant bradycardia (heart rate <45/min), cardiogenic shock, severe heart failure, and severe peripheral vascular disease. The above drugs are recommended to be used under the guidance of a doctor or pharmacist, and should not be used on their own to avoid adverse reactions.