Dexone is part of the Corticosteroids class and treats Edema, Multiple Sclerosis, Allergic Conjunctivitis and other conditions. Corticosteroids are used to treat a variety of conditions including skin issues such as eczema and psoriasis, eye inflammation, asthma, gout, allergic conjunctivitis, ulcerative colitis, edema, adrenal insufficiency, and hemorrhoids. They work by blocking substances in the body that cause swelling. Dexone is only available as a brand name drug.