Mesalamine affects a substance in the body that causes inflammation, tissue damage, and diarrhea. Mesalamine is used to treat ulcerative colitis, proctitis, and proctosigmoiditis. Mesalamine is also used to prevent the symptoms of ulcerative colitis from recurring. Mesalamine may also be used for purposes not listed in this medication guide.
Asacol is a drug that is available only by prescription and treats moderate active ulcerative colitis among adults. It belongs to a class of medicines known as aminosalicylates. Asacol works by reducing swelling in the colon. It may also be used to treat mild to moderate Crohn's disease. Asacol affects substances in the body that cause inflammation, diarrhea, as well as tissue damage.