21-(Acetyloxy)-17-hydroxypregn-4-ene-3,20-dione, commonly known as cortisone acetate, is a synthetic corticosteroid widely used in the pharmaceutical industry to treat inflammatory and autoimmune conditions. It serves as an active pharmaceutical ingredient in various formulations, including topical creams and ointments for skin disorders like eczema and dermatitis to reduce itching, redness, and swelling; eye drops for ocular inflammation; and oral tablets for systemic conditions such as asthma, arthritis, and chronic inflammatory diseases. By mimicking the action of cortisol, it suppresses immune responses and alleviates inflammation. Additionally, it may be employed as an intermediate in the synthesis of other steroid-based therapies.