Polymeric implants, preferably containing a mixture of PEG and PLG, for controlled release of active agents

摘要

Polymeric devices for controlled release of an active agent of interest are provided. The active agent is provided within a biodegradable polymer system to supply a polymeric device for controlled release of the active agent. The polymer system is a copolymer or a polymer blend comprising a hydrophobic component and a hydrophilic component, and the polymer system does not form a hydrogel when contacted with, or immersed in an aqueous system, for example when the device is implanted in a subject. When the device is administered to a subject, for example, when it is implanted, the device releases the active agent in a controlled fashion without a lag period, or with a minimal lag period. Methods for producing the polymeric devices are also provided, as are methods of using the polymeric devices to provide for controlled release of an active agent in a subject. Preferred hydrophobic component is a PLG. Preferred hydrophilic Components are a PEG or a methoxyPEG. Preferred peptides are LHRH, goserelin, leuprolide.