Mesalamine (5-ASA) for Ulcerative Colitis and Crohn's: Basics
Content note: Educational content aligned with publicly available patient materials from the Crohn's & Colitis Foundation and other major IBD education sources. IBDPal is not affiliated with or endorsed by the Foundation. Last reviewed June 2026. Not individual medical advice.
Educational use only. IBDPal does not provide medical advice, diagnosis, or treatment. Always consult your gastroenterologist or IBD care team for personal decisions.
Mesalamine (5-aminosalicylic acid, or 5-ASA) is a foundational medication for many people with ulcerative colitis and sometimes Crohn's disease involving the colon. It acts mainly on the lining of the bowel rather than suppressing the entire immune system like steroids.
Forms you may see
- Oral tablets or capsules
- Rectal suppositories or enemas for distal colitis
- Combination oral plus topical therapy in some plans
Adherence matters
Missing doses during remission is a common reason symptoms return. Use pill reminders or IBDPal medication tracking if helpful.
When to call your team
Worsening blood, pain, or fever despite mesalamine needs reassessment. Do not assume the medication failed without a visit and labs.
Related: immunosuppressants, ulcerative colitis hub.
Read the full interactive version on ibdpal.org.