Betalucil extended-release tablets for metoprolol extended-release tablets, patients with atrial fibrillation after the improvement of the condition of timely consultation, under the guidance of the doctor can gradually reduce the amount of the front one and a half a day, the present improvement can be eaten one a day. Metoprolol extended-release tablets are slow-release preparations, after taking the drug to maintain a stable 24 hours to play a role in the oral one and a half patients such as the condition of the stability of the patient, you can gradually reduce the dose, take a piece a day, but the specific dosage to follow the doctor’s instructions. Metoprolol extended-release tablets for Western prescription drugs, the mechanism of action of the drug is to inhibit the beta receptor, can be used for atrial fibrillation patients to control the ventricular rate treatment. The adverse effects of the drug include dizziness, bradycardia, abdominal pain, constipation, wheezing, etc. It is contraindicated in patients who are allergic to the components of the drug, second and third degree atrioventricular block, severe bradycardia, cardiogenic shock, and so on. Atrial fibrillation patients taking metoprolol extended-release tablets, if you need to adjust the dosage, be sure to follow the doctor’s instructions, avoid self-adjustment.