Bosulol is a beta-blocker, which can be used to treat cardiac arrhythmias, especially atrial precontractions. In addition, it is also a first-line, long-acting antihypertensive drug, which can also be used to treat hypertension and improve myocardial blood supply deficiency. For patients with coronary artery disease and angina pectoris, it can be used as a secondary prevention drug, and patients are advised to take it for a long time. Some patients may also have heart failure, and these drugs can help reverse left ventricular remodeling and slow down the progression of heart failure. If patients want to stop taking this drug, they must be careful to gradually reduce the dosage and stop taking it. In addition to this, it is not recommended that patients take the drug in a single dose that is too large, but also require a gradual increase in the oral dose that is relatively safest. Some patients may experience bradycardia while taking this medication. This drug is not recommended for people with bronchial asthma, or chronic obstructive pulmonary disease or low blood pressure.