Corticosteroids are a class of medications that mimic the effects of hormones produced by the adrenal glands, particularly cortisol. They are commonly used to reduce inflammation and suppress the immune system in various medical conditions, such as asthma, arthritis, and allergies. These medications can be administered in several forms, including pills, injections, and topical creams. While effective for treating many conditions, corticosteroids can have side effects, especially with long-term use, such as weight gain, high blood pressure, and increased risk of infections.