Controlled release formulations useful in controlling endoparasitic infestation in animals over a prolonged period of time are comprised of fenbendazole 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.
可用于长期控制动物体内寄生虫侵扰的控释制剂由分散在共聚基质中的
芬苯达唑组成,该共聚基质由约 60% 至约 95% 重量百分比的
乳酸和约 40% 至约 5% 重量百分比的
乙醇酸缩合而成。