PEG-POLYACETAL DIBLOCK AND TRIBLOCK COPOLYMERS AND PHARMACEUTICAL COMPOSITIONS

摘要

This invention relates to block copolymer delivery vehicles comprising a polyethyleneglycol-polyacetal, and to controlled release pharmaceutical compositions comprising the delivery vehicle and an active agent. The block copolymers of the invention may be thermogel block copolymers. The pharmaceutical compositions may be in the form of a topical, syringable, or injectable formulation for local controlled delivery of the active agent.