| abstract |
A delivery system for agents, such as therapeutic agents, or other substances includes a biodegradable polymer and the agent or substance. The delivery system is coated with a barrier substance that decreases the quantity of the agent release from the system, compared to the quantity of the agent release from a system not coated with the substance, in the forty-eight hours period immediately subsequent to the parenteral injection or implantation of the system into a living person or annimal. |