Bioactive agents are embedded in a cross-linked dextran and coated with a bioresorbable polymer. When implanted in a mammal, the coated cross-linked dextran composition produces controlled release of the embedded bioactive agent. The dosage forms according to certain embodiments of the invention described herein include implants. Although effective systemic levels of medication can be attained via implants, some of the embodiments of the dosage forms described herein are designed for localized delivery.
