Mesalazine
（重定向自PENTASA）
![](/Images/godic/202502/02/Mesalazine_structure.svg3642.png")
![](/Images/godic/202502/02/5-amino-2-hydroxybenzoic_acid_200.svg3642.png")
![Herstellung von 5-Aminosalicylsäure](/Images/godic/202502/02/Synthesis_5-Aminosalicylic_acid.svg3642.png")
![Capsules de Pentasa, 250 mg, des USA.](/Images/godic/202502/02/000863lg_Pentasa_250_mg3642.jpg")
Mesalazine (INN, BAN), also known as mesalamine (USAN) or 5-aminosalicylic acid (5-ASA), is an aminosalicylate anti-inflammatory drug used to treat inflammatory bowel disease, including ulcerative colitis, inflamed anus or rectum, and to maintain remission in Crohn's disease.