Betalucil is composed of metoprolol, there is no better drug between ivabradine and metoprolol, it depends on the specific indications. Ivabradine mainly inhibits ion channels, inhibits the inward flow of sodium ions, slows down myocardial conduction, thus exerting the effect of lowering the heart rate. Metoprolol mainly inhibits β-receptors, slowing down the heart rate and lowering blood pressure. Clinically, both ivabradine and metoprolol can be used in the treatment of heart rate control, but ivabradine has no negative inotropic effect while controlling the heart rate, and can be used to control the ventricular rate in patients with heart failure. Metoprolol has negative inotropic effects while controlling the ventricular rate and cannot be used in the treatment of patients with acute heart failure. Adverse effects of ivabradine include bradycardia, dyspnea, angioedema, palpitations, etc. It is contraindicated in patients with acute myocardial infarction, allergy to the drug components, cardiogenic shock, sick sinus node syndrome, and unstable angina. Adverse effects of Metoprolol include hypotension, dizziness, bradycardia, stomach upset, constipation, etc. It is contraindicated in patients with allergy to the drug components, second and third degree atrioventricular block, severe bradycardia, cardiogenic shock, hypotension and bronchial asthma. Ivabradine and metoprolol have their own characteristics, and should be used under the guidance of a physician when used clinically.