Easy-to-read patient tips for metoprolol-tartrate covering how it works, benefits, risks, and best practices. Metoprolol is used for a number of conditions, including angina, acute myocardial infarction, high blood pressure, supraventricular tachycardia, ventricular tachycardia, congestive heart failure, and prevention of migraine headaches. [5] It is an adjunct in the treatment of hyperthyroidism. [18] Both oral and intravenous forms of metoprolol are available for administration. [19] The different. 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. 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 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 (Lopressor) is a beta blocker used to treat chest pain and high blood pressure in adults. It can also lower the risk of death after a heart attack. You take it by mouth, typically once or twice a day, but your dose depends on your condition. Side effects include dizziness, shortness of breath, and it can make you tired. 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 is used to treat angina (chest pain) and hypertension (high blood pressure). Learn about side effects, interactions and indications. Metoprolol tartrate comes as an oral tablet. Metoprolol succinate comes as an extended-release (ER) oral tablet. Metoprolol oral tablets are available as the brand-name drugs Lopressor and Toprol XL.