Controlled release parasitic formulations and method

摘要

Controlled release formulations useful in controlling endoparasitic infestation in animals over a prolonged period of time are comprised of an anthelmintic agent intimately dispersed throughout a copolymeric matrix derived from the condensation of about 60 to about 95 weight percent of lactic acid and about 40 to about 5 weight percent of glycolic acid, said copolymeric matrix being substantially free of polymerization catalyst.