Diacerein is primarily used in the treatment of osteoarthritis. It helps reduce pain and inflammation in the joints, particularly in the knees and hips. Unlike fast-acting pain relievers, diacerein works slowly over several weeks and has a disease-modifying effect, meaning it may help slow down the progression of joint damage. It is commonly prescribed for long-term management of symptoms in patients who cannot tolerate nonsteroidal anti-inflammatory drugs (NSAIDs). Diacerein also promotes the synthesis of proteoglycans in cartilage, supporting joint structure and function. It is often used as part of a broader treatment plan that includes physical therapy and lifestyle changes.