| abstract |
This invention relates to a drug composition with a controlled drug release rate. The drug composition comprises: a matrix formed of the following ingredients (a) and (b): (a) a biodegradable, biocompatible high-molecular substance and/or polyvalent metal ions or polyvalent metal ion source, and (b) hyaluronic acid or a salt thereof; and a drug incorporated as an ingredient (c) in said matrix. The drug composition has biodegradability and biocompatibility, permits easy control of a release rate of the drug, and can persistently exhibit its pharmacological effect over a long time. |