The prescription drug Lialda® (mesalamine) is approved for only one use (or "indication") -- the treatment of mild-to-moderately active ulcerative colitis. This is a type of inflammatory bowel disease (IBD) that leads to inflammation and sores in the lining of the large intestine and rectum. It commonly causes abdominal pain (stomach pain), diarrhea, and other symptoms.
A healthcare provider may also prescribe Lialda "off-label" for an unapproved use. For example, Crohn's disease is sometimes treated with Lialda, even though the medication is not licensed for this use.
(For more details on the drug's indications, click Lialda Uses. This article offers more information on the effects of the drug and also talks about whether it can be used in children.)