PROBLEM TO BE SOLVED: To provide a method for producing a medicine that can be conveyed to a human small intestine in the state of holding a medical drug on a carrier.SOLUTION: There is provided a method for producing a medicine in which a medical drug is held by a carrier, in which a polymer formed by polymerizing monomer components containing unsaturated carboxylic acid based monomer and polyoxyalkylene group-containing unsaturated monomer is used as the carrier, solution of the polymer and the medical drug are mixed under the presence of a cationic crosslinking agent, and crystallized medicine is recovered.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】医薬を担体に保持した状態でヒトの小腸に輸送することができる薬剤を製造する方法を提供すること。【解決手段】医薬が担体に保持されてなる薬剤の製造方法であって、担体として不飽和カルボン酸系単量体およびポリオキシアルキレン基含有不飽和単量体を含有する単量体成分を重合させてなる重合体を用い、当該重合体の溶液と医薬とを陽イオン架橋剤の存在下で混合し、析出した薬剤を回収することを特徴とする薬剤の製造方法。【選択図】なし