Pentasa is a medication primarily used to treat inflammatory bowel diseases, such as ulcerative colitis and Crohn's disease. It contains the active ingredient mesalamine, which helps reduce inflammation in the intestines, providing relief from symptoms like abdominal pain and diarrhea. Pentasa is available in various forms, including tablets and granules, allowing for flexible dosing. It works by delivering the medication directly to the affected areas of the gastrointestinal tract, promoting healing and maintaining remission. Regular use can help manage flare-ups and improve the quality of life for those with these chronic conditions.