Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease inflammation in conditions such as asthma, COPD, and rheumatologic diseases. [3] It is also used to treat high blood calcium due to cancer and adrenal insufficiency along with other corticosteroids. [3] It is taken by mouth. [3] Corticosteroid medicines include cortisone, hydrocortisone and prednisone, among others. They help treat rashes, inflammatory bowel disease, asthma and several other conditions. But corticosteroids also may have serious side effects. Prednisone belongs to a group of medicines called corticosteroids. It has anti-inflammatory effects and can regulate the body’s metabolism and immune response. Prednisone is a corticosteroid (cortisone-like medicine or steroid). It works on the immune system to help relieve swelling, redness, itching, and allergic reactions. This medicine is available only with your doctor's prescription. Learn about the side effects of prednisone, from common to rare, for consumers and healthcare professionals. Prednisone is a steroid medication that treats conditions like asthma, allergic reactions, arthritis, inflammatory bowel disease and adrenal, blood or bone marrow conditions. Prednisone is used to treat allergic disorders, ulcerative colitis, psoriasis and arthritis. Learn about side effects, interactions and indications.