Metoprolol, sold under the brand names Lopressor and Toprol-XL among others, is a medication used to treat angina, high blood pressure and a number of conditions involving an abnormally fast heart rate. [5] Metoprolol tartrate is the immediate-release version of metoprolol, a commonly prescribed cardioselective beta blocker. Used for blood pressure or heart problems, metoprolol tartrate works by slowing the heart and reducing the force of its contractions. This reduces blood pressure and relieves the stress on the heart muscle. Metoprolol may worsen the symptoms of heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort, dilated neck veins, extreme fatigue, irregular breathing or heartbeat, swelling of the face, fingers, feet, or lower legs, trouble breathing, or weight gain. Metoprolol Tablets Metoprolol (Lopressor®) is a medication that lowers your blood pressure and heart rate, making it easier for your heart to pump blood to the rest of your body. It treats high blood pressure. It also prevents chest pain or further damage after a heart attack. It’s a type of beta-blocker. Lopressor (Metoprolol Tartrate) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Metoprolol tartrate is a β1-selective adrenergic blocking agent (β-blocker). Easy-to-read patient tips for metoprolol-tartrate covering how it works, benefits, risks, and best practices. Metoprolol is used to treat angina (chest pain) and hypertension (high blood pressure). Learn about side effects, interactions and indications. Find patient medical information for Metoprolol (Lopressor, Toprol XL, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Metoprolol tartrate tablets should be taken with or immediately following meals. The usual initial dosage is 100 mg daily in single or divided doses. Adjust dosage at weekly (or longer) intervals until optimum blood pressure reduction is achieved. In general, the maximum effect of any given dosage level will be apparent after 1 week of therapy.