Asacol is a medication primarily prescribed for the management of inflammatory bowel disease (IBD). Its active ingredient, mesalamine (also known as 5-aminosalicylic acid or 5-ASA), acts locally on the lining of the gastrointestinal tract to reduce inflammation. Asacol HD delayed-release 800mg tablets are used to treat moderately active ulcerative colitis in adults. Stop using Asacol HD and call your doctor at once if you have severe stomach pain, stomach cramping, bloody diarrhea (may occur with fever, headache, and skin rash). Asacol is a medication used to treat inflammatory bowel disease, including ulcerative colitis and Crohn's disease. It is generally used for mildly to moderately severe disease. Asacol ® HD (mesalamine) delayed-release tablets are available as red-brown, capsule-shaped tablets containing 800 mg mesalamine and imprinted with “WC 800” in black. Asacol tablets are indicated for the treatment of mildly to moderately active ulcerative colitis and for the maintenance of remission of ulcerative colitis. Asacol tablets are contraindicated in patients with hypersensitivity to salicylates or to any of the components of the Asacol tablet. Mesalamine is used to treat and prevent flare-ups of mild to moderately active ulcerative colitis (an inflammatory bowel disease). It works inside the bowels to reduce inflammation and other symptoms of the disease. This medicine is available only with your doctor's prescription. This product is available in the following dosage forms: Asacol (Mesalamine Delayed-Release Tablets) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Asacol® is indicated for the treatment of mildly to moderately active ulcerative colitis in patients 5 years of age and older. Asacol is indicated for the maintenance of remission of mildly to. Mesalazine is sold under various names including Apriso, Asacol, Asacol HD, Canasa, Delzicol, Fivasa, Lialda, Salofalk, Pentasa, Rowasa, Octasa, and Sfrowasa. In Europe, it is sold under the name Salofalk (rectal suppository). [27][28] Asacol™ (mesalazine) is a medicine for the treatment of the inflamed lining of the large bowel (colonic and rectal mucosa).