Tubasal

4-Aminosalicylic acid, also known as para-aminosalicylic acid (PAS) and sold under the brand name Paser among others, is an antibiotic primarily used to treat tuberculosis.[2] Specifically it is used to treat active drug resistant tuberculosis together with other antituberculosis medications.[3] It has also been used as a second line agent to sulfasalazine in people with inflammatory bowel disease such as ulcerative colitis and Crohn's disease.[3 ... [wikipedia]