Sustained-release compositions for parenteral administration

摘要

Sustained-release compositions comprising a macrolide compound, a surfactant, a co-solvent, and a solvent. The sustained-release compositions of this invention may be parenterally administered to animals, and are useful for preventing or treating helminth, acarid or arthropod endo- or ectoparasitic infection or infestation in warm-blooded animals for prolonged periods of time.