The ingredient in Bosu is Bisoprolol Fumarate, and the drug should be tapered off gradually, not abruptly. Bisoprolol fumarate belongs to the beta-blocker, can be used for the treatment of hypertensive tachyarrhythmia, the process of taking if you need to reduce the dose, if you take half a tablet, can be reduced to 1/4, it is recommended that every two weeks to reduce the dose of two weeks to reach the minimum maintenance amount of two weeks, you can gradually stop the drug. Bisoprolol fumarate belongs to the western prescription drugs, the adverse effects of the drug are bradycardia, headache, dizziness, wheezing, etc. Cardiogenic shock, allergy to the drug components, second and third-degree atrioventricular block, severe bradycardia, bronchial asthma, peripheral vascular diseases of the patient is prohibited, the specific use of the medication should be in accordance with the doctor’s instructions.