Mezavant XL is a brand name for the medication mesalazine (also known as mesalamine), which is primarily used in the treatment of ulcerative colitis, a chronic inflammatory bowel disease. It belongs to a class of drugs known as aminosalicylates, which work by reducing inflammation in the colon and rectum, thereby alleviating symptoms such as diarrhea, rectal bleeding, and abdominal pain. Mezavant XL is formulated as an extended-release tablet, designed to release the active ingredient slowly over time, allowing for once-daily dosing. This can improve patient compliance and convenience compared to medications that require multiple daily doses. It is important for patients to follow their healthcare provider's instructions when taking Mezavant XL to ensure its effectiveness and to minimize potential side effects.