Metoprolol Succ ER (the common abbreviation for Metoprolol Succinate ER and a generic form of Toprol XL) is an extended release formulation of the drug metoprolol, which is used for the treatment of angina or hypertension and to reduce mortality/hospitalization in patients with heart failure who are already receiving cardiac and diuretic medications. At PatientsLikeMe,… Continue reading See What Other Patients Are Saying About Metoprolol Succ ER