The duration of Metoprolol Succinate Extended-Release Tablets needs to be considered in the context of the specific condition and may need to be maintained for a long period of time, but may also need to be discontinued if the cause of the condition is removed. Metoprolol succinate tablets are mainly used to treat cardiac arrhythmias as well as cardiac insufficiency, and many patients may require long-term medication as the cause of their condition cannot be removed. However, some patients may be able to lift the cause of the disease, such as electrolyte disorders can be induced by frequent premature beats and other arrhythmias, if the electrolyte disorders have been corrected premature beats and other arrhythmias, can be gradually recovered, this time, Metoprolol succinate extended-release tablets may only need to be short-term use of the drug, or even 1-2 weeks of use can be discontinued. However, sudden discontinuation of Metoprolol Succinate Tablets may lead to rebound phenomenon, which may make the heart beat too fast, and may need to be discontinued gradually by reducing the dosage under normal circumstances. Metoprolol succinate tablets may have certain side effects, such as the use of the drug may lead to slow heart rate, or even serious conduction block, may also lead to dizziness, headache, depression, sleep disorders, and other side effects, the occurrence of serious adverse reactions, the need to stop the drug in a timely manner. For patients with cardiogenic shock and severe atrioventricular block need to be prohibited. Therefore, Metoprolol succinate extended-release tablets need to be used under medical supervision.