Seloken XL Tablet, which contains Metoprolol Succinate, is categorized as a beta-blocker medication. It is prescribed for the treatment of conditions such as high blood pressure (hypertension), angina (chest pain caused by heart-related issues), and irregular heart rhythms (arrhythmia). Additionally, it is used to prevent migraines as well as future heart attacks and strokes. Lopressor is another name for Metoprolol Succinate.