About Met XL 12.5 Met XL 12.5 contains Metoprolol Succinate (12.5mg) which is an antihypertensive agent belonging to the beta-blocker class. Met XL 12.5 is approved for treating hypertension, angina, supraventricular tachycardia, ventricular tachycardia, congestive heart failure, and the prevention of migraine headaches. Met Xl 12 . 5 MG Tablet XL is a heart medicine that contains Metoprolol. It is used to treat hypertension (high blood pressure), angina pectoris (chest pain caused when your heart muscle does not get enough oxygen-rich blood), and arrhythmia (irregular heartbeat). Met XL 12 . 5 Tablet is used to manage high blood pressure and heart conditions such as angina. It contains Metoprolol, a beta-blocker that helps reduce heart rate and blood pressure, improving heart function and reducing the risk of heart attacks and strokes. Uses of Met Xl 12 . 5 MG Met XL 12 . 5 tablet is used to treat high blood pressure mainly, along with certain heart conditions such as angina (chest pain) and heart failure.