Prednisone is a common steroid that can cause immediate and long-term side effects. Learn when these side effects typically start and how to manage them. 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 cost, uses, and more for prednisone. It’s a generic prescription tablet that treats inflammatory and autoimmune conditions in adults and children. 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] Prednisone is in a class of medications called corticosteroids. It works to treat patients with low levels of corticosteroids by replacing steroids that are normally produced naturally by the body. Prednisone is a steroid medication that treats a wide range of health conditions including asthma, allergic reactions, arthritis and inflammatory bowel disease. Prednisone is used to treat allergic disorders, ulcerative colitis, psoriasis and arthritis. Learn about side effects, interactions and indications. Taking prednisone? Learn how it works and key tips for safe use. Stay informed and manage your health confidently. Overview: Prednisone is used to treat a variety of inflammatory, autoimmune, and hormonal conditions. It works by suppressing the body’s immune response and reducing inflammation. Common side. Prednisone is a powerful medication that belongs to a class of drugs called corticosteroids. It works by mimicking the effects of natural hormones produced in your body to reduce inflammation and suppress immune system responses.