Prednisone is a prescription medicine used to treat acute asthma, arthritis, allergic reactions, respiratory illness, and many other conditions. Learn about dosage, side effects, warnings, and more. 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 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. Prednisone is a drug used for suppressing the immune system and inflammation such as asthma, severe psoriasis, lupus, ulcerative colitis, Crohn's disease, and several types of arthritis. Side effects, drug interactions, dosage, and pregnancy and breastfeeding safety information are provided. Learn about the side effects of prednisone, from common to rare, for consumers and healthcare professionals. 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 prescription corticosteroid (steroid) used to reduce inflammation, suppress an overactive immune system, and treat endocrine and metabolic disorders. Prednisone is a steroid medication that treats a wide range of health conditions including asthma, allergic reactions, arthritis and inflammatory bowel disease. Prednisone oral tablet is a prescription steroid that treats various conditions involving inflammation. Learn about uses, side effects, and more. Learn about prednisone usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives.