Metoprolol tartrate can be taken for up to 1~2 weeks or for a long time, but there is no clear regulation on how long it can be taken at most, so you can use it under the guidance of your doctor in combination with your physical condition. Metoprolol tartrate is a beta-blocker, used for the treatment of supraventricular tachyarrhythmia, for myocardial ischemia, acute myocardial infarction can also play a certain preventive and therapeutic role, can also be used to alleviate cardiovascular disease caused by arrhythmia and chest pain. Generally, patients can take the drug for at most 1~2 weeks or for a long period of time. However, the specific dosage and time of taking the drug is not clearly defined, and when using the drug, it is necessary to combine the individual’s physical fitness and the severity of the disease, and the professionals to formulate a suitable program of treatment. Adverse effects such as headache, dizziness and bradycardia may occur while taking Metoprolol Tartrate. Since this drug may cause damage to kidney function and liver function, as well as angina pectoris attack, it is not suitable for patients with severe hepatic impairment, renal impairment and decompensated cardiac insufficiency.