Diclofenac sodium is widely used as a nonsteroidal anti-inflammatory drug (NSAID) to alleviate pain, reduce inflammation, and manage fever. It is commonly prescribed for conditions such as arthritis, including osteoarthritis and rheumatoid arthritis, to improve joint mobility and reduce stiffness. Additionally, it is effective in treating acute pain caused by injuries, dental procedures, or postoperative recovery. In some cases, it is applied topically in gel or patch form to target localized pain, such as muscle strains or sprains. It is also used to manage migraine attacks and menstrual cramps due to its pain-relieving properties. However, it should be used with caution due to potential side effects, particularly on the gastrointestinal system and cardiovascular health.