PROBLEM TO BE SOLVED: To provide a medicine or a tablet, or a granular binder which has sufficient binding power even used by a little amount, and can obtain sufficient eluting efficiency with unchanged appearance and power of a granular agent or a tablet even if stored for a long period.SOLUTION: The medicine or tablet, or the granular binder is characterized by containing a copolymer obtained by copolymerizing polyvinyl alcohol having an average degree of polymerization of 200 to 1,300 with at least one polymerizable vinyl monomer which is selected from the group consisting of an unsaturated carboxylic acid, its salt thereof and an ester of the unsaturated carboxylic acid in a weight ratio of from 6:4 to 9:1.COPYRIGHT: (C)2011,JPO&INPIT【課題】少量で十分な結合力を有し、しかも長期保存した場合でも、顆粒剤や錠剤の外観、強度とも変わらず、十分な溶出性を得ることができる、医薬、又は錠剤若しくは顆粒剤の結合剤を提供する。【解決手段】平均重合度200以上1300以下のポリビニルアルコールと、不飽和カルボン酸、それらの塩、及び不飽和カルボン酸のエステルからなる群より選ばれる少なくとも1種の重合性ビニル単量体とを重量比で6:4~9:1の割合で共重合させて得られる共重合体を含むことを特徴とする医薬、又は錠剤若しくは顆粒剤の結合剤。【選択図】なし
