Diclo-denk 100 is a nonsteroidal anti-inflammatory drug (NSAID) used to treat mild to moderate pain in conditions like migraine headaches, osteoarthritis or rheumatoid arthritis, ankylosing spondylitis and menstrual cramps. Diclo-denk may also cause or worsen stomach or intestinal bleeding as in peptic ulcer disease. Taking Diclo-denk during the last 3 months of pregnancy may also harm the unborn baby. Do not breast-feed while taking Diclo-denk.