| abstract |
(57) [Summary] (Modified) [Objective] To provide an orally-administered inflammatory bowel disease therapeutic preparation which selectively and reliably and effectively releases a drug. A composition containing a therapeutic agent for inflammatory bowel disease is a copolymer comprising at least one structural unit represented by general formula (I) and at least one structural unit represented by general formula (II). An orally-administered preparation coated with a certain colon-degradable polymer or a film-forming composition containing the polymer. [In the formula, R represents a divalent organic group; R 1 represents a sugar residue that is decomposed or assimilated in the large intestine; R 2 represents a hydrocarbon residue, a polyalkylene glycol group, a polyester group, a polyamide group, or the like. X 1 and X 2 represent O, NH or S respectively; |