Mesalamine is a medication primarily used to treat inflammatory bowel diseases, such as ulcerative colitis and Crohn's disease. It works by reducing inflammation in the intestines, helping to alleviate symptoms like abdominal pain and diarrhea. Mesalamine is available in various forms, including tablets, capsules, and rectal suppositories. This drug is often prescribed as part of a long-term treatment plan to maintain remission and prevent flare-ups of these conditions. While generally well-tolerated, some patients may experience side effects, such as headaches or gastrointestinal discomfort. Regular monitoring by a healthcare provider is recommended during treatment.