Diclo Denk 100mg Rectal Suppositories is a nonsteroidal anti-inflammatory drug (NSAID) which relieves pain and reduces inflammation (swelling). It is used to treat mild to moderate pain in conditions such as migraine, headaches, muscle aches, dental pain and athletic injuries. It is also used to treat pain, swelling and stiffness from osteoarthritis or rheumatoid arthritis, ankylosing spondylitis and menstrual cramps.