| 摘要 |
Disclosed is a drug complex of a drug having a hydroxyl group, which is capable of controlling the rate of the release of the drug therefrom in blood, the drug complex being represented by the following formula (1): A-B-C (1) wherein A represents at least one carrier selected from the group consisting of saccharides each having a car- boxyl group, polyethylene glycols each having a carboxyl group, aliphatic carboxylic acids each having a carboxyl group, and derivatives thereof each having a carboxyl group; B represents at least one spacer comprised of a compound having a amino group and a carboxyl group; C represents at least one drug having a hydroxyl group, wherein the carrier A is bonded to the spacer B through an amide bond formed between the carboxyl group of the carrier A and the amino group of the spacer B; and the spacer B is bonded to the drug C through an ester bond formed between the carboxyl group of the spacer B and the hydroxyl group of the drug C. The drug complex of the present invention is capable of not only surely controlling the rate of release of the drug therefrom, but also enhancing the transferability of the drug to target tissues and the pharmacological effect of the drug.
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