A pharmaceutical composition or combination drug, which contains, as active ingredients, (a) a coordination compound composed of a block copolymer represented by the following formula I or formula II and cisplatin, and (b) gemcitabine hydrochloride. In the formulae I and II, R 1 , A, R 2 , R 3 , m and n are as defined in the description.一種藥學組成物或組合劑，係含有下述作為有效成分者：(a)由下述式I或式II所表示的嵌段共聚物與順鉑所構成之配位化合物：(上述式I及式II中，R1、A、R2、R3、m、n係如說明書所定義者)；及(b)鹽酸健西他濱。
