Sulf 1000 Tablet 10's is used to treat bowel diseases (ulcerative colitis, Crohn's disease), skin-related problems (psoriasis), and chronic joint diseases (rheumatoid arthritis, ankylosing spondylitis) in children and adults. It contains Sulfasalazine, which works as an inflammation reducer by acting locally, inhibiting the formation of a chemical known as prostaglandins, that control pain and inflammation. Thus, it helps reduce the inflammation of the intestine, skin, and joints. In some cases, you may experience a sore throat, a fever, unexplained bruising, or ringing in your ears (tinnitus). Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.