Pharmaceutical preparation containing camptothecin-based polymeric derivative

摘要

The present invention addresses the problem of providing a pharmaceutical preparation, i.e., a pharmaceutical preparation composition, which contains a polymerized camptothecin derivative comprising a polymer carrier and a camptothecin derivative bonded to the polymer carrier and capable of associating in an aqueous solution to exhibit a nano-particle formation property, and which has improved pharmaceutical stability. Particularly, the present invention addresses the problem of providing a pharmaceutical preparation which has an excellent associative aggregation formation property that is an important factor and also has excellent storage stability in terms of chemical stability.A pharmaceutical preparation containing a block copolymer comprising a polyethylene glycol segment and a poly(glutamic acid) segment linked to each other, wherein the poly(glutamic acid) segment contains a glutamic acid unit having a camptothecin derivative bonded thereto; and a pharmaceutical preparation containing at least one additive selected from the group consisting of arginine, histidine and sodium chloride.