Rheumac Gel is a topical analgesic formulated to relieve pain and inflammation associated with musculoskeletal conditions like arthritis, sprains, and strains. The gel contains the active ingredient diclofenac, a powerful nonsteroidal anti-inflammatory drug (NSAID) that works by blocking the production of pain-causing chemicals in the body. To use, apply a thin layer of Rheumac Gel to the affected area and gently massage until absorbed. Follow the instructions on the packaging or consult your healthcare professional for proper dosage, and avoid applying the gel to open wounds or irritated skin.