Ibuprofen Denk 600mg tablet is used to relieve mild to moderate pain from a headache, menstrual periods, muscle ache, common cold, toothache, or a backacahe. This medicine works by reducing the activity of a chemical in the body that causes pain and swelling. Ibuprofen Denk 600 is also used to reduce fever. It is also used to relieve pain associated with the inflammation, swelling and stiffness of the joints caused by rheumatoid arthritis and osteoarthritis.