Methylprednisolone is used to treat pain and swelling that occurs with arthritis and other joint disorders. This medication may also be used to treat various conditions such as blood disorders, severe allergic reactions, certain cancers, eye conditions, skin/intestinal/kidney/lung diseases, and immune system disorders. It decreases your immune systemâ€˜s response to these conditions and reduces symptoms such as swelling, pain, and allergic-type reactions. Talk to your doctor about the risks and benefits of methylprednisolone, especially if it is to be injected near your spine (epidural). Rare but serious side effects may occur with epidural use. Methylprednisolone is a corticosteroid hormone.