Diclofenac is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. It works by inhibiting enzymes in the body that contribute to inflammation and pain, making it effective for conditions like arthritis, muscle pain, and menstrual cramps. Available in various forms, including tablets, gels, and injections, Diclofenac is often prescribed for both acute and chronic pain management. While generally effective, it may cause side effects such as stomach upset or increased risk of heart issues, so it is important to use it under medical supervision.