Betalactam is used in clinical practice for the treatment of hypertension, angina pectoris, as well as myocardial infarction and heart failure. In addition to its therapeutic effects, it is also a secondary prophylactic drug that can delay the exacerbation of the disease and improve the survival rate of patients. Common adverse reactions to this drug may be hypotension or bradycardia in patients taking the drug, and the oral dose of the drug should be adjusted according to the actual blood pressure and heart rate of the patient. Some patients may also experience bronchospasm while taking this drug, which is not recommended for patients with bronchial asthma or chronic obstructive pulmonary disease. Betalac is also used to treat migraine headaches and can treat atrial premature contractions as well as ventricular premature contractions, with better results for atrial premature contractions.