Metoprolol tartrate is a beta-blocker, if you suffer from coronary heart disease, hypertension, chronic heart failure, arrhythmia, etc., usually need to take long-term medication, if only used for sudden cardiac arrhythmia, the heart rhythm back to normal can be discontinued, the specifics of the doctor’s orders. 1. patients with coronary heart disease, myocardial infarction, heart failure and other diseases, often choose metoprolol tartrate, the drug can slow down the heart rate, reduce cardiac oxygen consumption, reduce the cardiac load, the effect of the above diseases is better, can be taken over a long period of time, there is no obvious harm. 2. If there is no underlying disease, but only sudden rapid arrhythmia, such as supraventricular tachycardia, sinus tachycardia, etc., and accompanied by palpitations (rapid heartbeat, often accompanied by panic), dizziness and other symptoms, the drug can be discontinued after the heart rhythm returns to normal. If patients taking metoprolol tartrate for a long time, it is not recommended to stop the drug suddenly to avoid danger, if you want to adjust the drug must be under the guidance of a doctor.