Betalucil is the trade name, the generic name of the drug is metoprolol, temporary tachycardia can be short-term oral metoprolol, coronary heart disease and hypertension patients may need long-term oral metoprolol. Metoprolol mainly through the inhibition of beta receptors to play the role of slowing down the heart rate, lowering blood pressure, for temporary tachycardia, such as anxiety-induced tachycardia, can be short-term oral metoprolol treatment. For patients with coronary artery disease and high blood pressure, lifelong oral medication is required, and metoprolol needs to be taken orally for a long period of time. Metoprolol belongs to the western prescription drugs, indications include hypertension, coronary artery disease, tachyarrhythmia, etc. The adverse reactions of the drug are tachycardia, dizziness, nausea, vomiting, dyspnea, etc. Cardiogenic shock, severe bradycardia, second-degree and third-degree atrioventricular block, sick sinus node syndrome, bronchial asthma, allergy for the drug components of the patient is prohibited.