A solid pharmaceutical composition for release of a biologically active substance into a desired aqueous environment, containing a core and an outer layer, said core comprising between 17 and 93% by weight of the biologically active substance, between 0.01 and 7% by weight of a water swellable polymer material and between 0 and 83% of one or more accessory ingredients, relative to the total weight of the core; and the outer layer comprising between 25 and 75% by weight of the biologically active substance, between 25 and 75% by weight of a material for enabling rapid dispersion of the outer layer into the aqueous environment and 0 to 50% by weight of one or more accessory ingredients, relative to the total weight of the outer layer. The composition is preferably formulated as a bolus for veterinary use.
一种用于将
生物活性物质释放到所需
水环境中的固体药物组合物,包含一个内核和一个外层,相对于内核总重量,所述内核由 17% 至 93% 的
生物活性物质、0.相对于内核的总重量,外层包括 25% 至 75% 的
生物活性物质、25% 至 75% 的可使外层快速分散到
水环境中的材料以及 0% 至 50% 的一种或多种辅助成分。组合物最好配制成兽用栓剂。