<prompt> Sulfa drug used in inflammatory bowel disease includes:SulfasalazineSulfamethoxazoleSulfinpyrazoneSulphadoxine  <response>: the azo bond is split by colonic bacteria to release 5ASA and sulfa pyridine .the former exes a local antiinflammatory effect ESSENTIALS OF MEDICAL PHARMACOLOGY SEVENTH EDITIION KD TRIPATHI PG NO 683 