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An aminosalicylate is an anti-inflammatory medicine related to 5-aminosalicylic acid, also called 5-ASA or mesalamine. These medicines act mainly on the lining of the intestine rather than through broad systemic immune suppression. The group includes mesalamine, sulfasalazine, olsalazine, and balsalazide. Formulations are designed to release active medicine in different parts of the colon or rectum.
read more about aminosalicylate ...Aminosalicylates are commonly used to induce and maintain remission in mild to moderate ulcerative colitis. Oral treatment is used for more extensive colonic disease, while suppositories or enemas target inflammation in the rectum or left side of the colon. Combined oral and rectal treatment can be used when greater local coverage is needed. Their role in Crohn disease is limited and depends on the drug, disease location, and clinical guidance.
The exact mechanism is not fully defined, but 5-aminosalicylic acid reduces several inflammatory pathways within the intestinal lining. It affects prostaglandins, leukotrienes, cytokines, nuclear signaling, and activity of inflammatory cells. The effect is largely topical, so delivery of active medicine to the inflamed bowel segment is important. Different coatings, carriers, and prodrugs control where release occurs.
Products include immediate-release, delayed-release, extended-release, and multimatrix oral formulations as well as rectal suppositories and enemas. Tablets or capsules should be swallowed, opened, or divided only according to their specific instructions. Sulfasalazine is converted by colonic bacteria into 5-aminosalicylic acid and sulfapyridine. Adherence can be challenging because some regimens involve several tablets or both oral and rectal therapy.
Possible effects include headache, nausea, abdominal pain, diarrhea, rash, and worsening colitis-like symptoms from acute intolerance. Rare risks include kidney injury, pancreatitis, liver injury, blood disorders, myocarditis, pericarditis, or severe skin reactions. Sulfasalazine can cause additional effects related to its sulfapyridine component, including reversible reduction in sperm count and impaired folate absorption. Kidney function is evaluated before treatment and periodically during therapy.
Yes. Mesalamine is 5-aminosalicylic acid and is the active anti-inflammatory component delivered by several ulcerative-colitis products.
No. They are chemically related to salicylates but are formulated mainly for local anti-inflammatory action in the bowel. Their uses and dosing differ from aspirin.
Mesalamine-containing products can rarely cause kidney injury and are substantially eliminated through the kidneys. Baseline and periodic renal-function testing helps identify problems.
Yes. Mesalamine suppositories and enemas deliver medicine directly to the rectum or distal colon. The selected form depends on the location of inflammation.
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Sulfasalazine. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK557809/. Date Accessed August 6, 2026.
Ulcerative Colitis. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK459282/. Date Accessed August 6, 2026.
Mesalamine Suppositories: Prescribing Information. DailyMed. https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=efa9d039-ae1f-4cd6-98f2-e87a901dfaeb. Date Accessed August 6, 2026.
Mesalamine. LiverTox (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK547995/. Date Accessed August 6, 2026.