Lopressor (Metoprolol Tartrate) - Pills

Metoprolol is used alone or in combination with other medications to treat high blood pressure. It also is used to prevent angina (chest pain) and to treat heart attacks. Extended-release (long-acting) metoprolol also is used in combination with other medications to treat heart failure. Metoprolol is in a class of medications called beta-blockers. It works by slowing the heart rate and relaxing the blood vessels so the heart does not have to pump as hard.