Prednisone is a synthetic corticosteroid drug that is commonly prescribed to treat a variety of conditions. It works by suppressing the immune system and reducing inflammation in the body. Prednisone is often used to manage autoimmune disorders such as rheumatoid arthritis, lupus, and Crohn's disease, as well as allergic reactions, asthma, and certain types of cancer. It can also be prescribed to alleviate symptoms of skin conditions like eczema and psoriasis. However, prolonged use or high doses of prednisone can lead to various side effects, including weight gain, mood swings, high blood pressure, and increased susceptibility to infections. Therefore, it is important for patients to follow their doctor's instructions carefully and monitor for any adverse reactions while taking prednisone.