Betalucil is the trade name for metoprolol tartrate and can be taken together with enalapril maleate folic acid tablets. Metoprolol tartrate is a beta receptor antagonist and enalapril is an angiotensin-converting enzyme inhibitor. Both drugs can lower blood pressure, but the mechanism of action is different, and the combination can enhance the efficacy. Enalapril maleate folic acid tablets are used for the treatment of essential hypertension accompanied by elevated plasma homocysteine levels, which may reduce the incidence of cardiovascular and cerebrovascular adverse events. The main adverse effects include cough, angioneurotic edema, dizziness, and headache. It is contraindicated in those who are allergic to the product and used with caution in those with severely impaired renal function. Metoprolol tartrate is used in small doses for tachyarrhythmias; prevention and treatment of myocardial ischemia, acute myocardial infarction, arrhythmias and chest pain, and in larger doses to lower blood pressure and improve cardiac function in elderly patients with chronic congestive heart failure. Common adverse reactions include fatigue, headache, dizziness, chills in the extremities, bradycardia, abdominal pain, nausea, vomiting, diarrhea and constipation. It is contraindicated in people who are allergic to the product and in patients with severe peripheral vascular disease accompanied by a risk of gangrene. Two drugs at the same time to take the superposition of antihypertensive effect, headache, dizziness and other adverse reactions may be aggravated, such as the need for joint use of drugs, it is recommended to consult a specialist, under the guidance of the doctor to take medication, the use of medication after the emergence of discomfort, prompt medical attention, so as to avoid misunderstanding of the condition.