Sulfasalazine is a prescription medication used to treat symptoms of ulcerative colitis (a chronic inflammatory condition that causes swelling and sores in the lining of the large intestine). This medication is prescribed as both a treatment for ulcerative colitis and a preventative measure against the painful symptoms that occur during a flare-up.
In addition to its use as a treatment for ulcerative colitis, sulfasalazine may be prescribed to adults or children who have been diagnosed with rheumatoid arthritis and have not responded well to other medications.