Injectable depot compositions are provided that include a polymer matrix having a plurality of bioerodible, biocompatible polymers wherein wherein each polymer of the plurality of polymers has a specified weight average molecular weight; and the polymer matrix has a broad molecular weight distribution of the plurality of polymers; a solvent having a miscibility in water of less than or equal to 7 wt. % at 25° C., in an amount effective to plasticize the polymer and form a gel therewith; and a beneficial agent. The compositions are have substantially improved the shear thinning behavior and reduced injection force, rendering the compositions readily implanted beneath a patient's body surface by injection.
提供可注射的缓释剂组合物,其包括具有多种可
生物降解、
生物相容性聚合物的聚合物基质,其中多种聚合物中的每一种聚合物具有规定的重均分子量;并且聚合物基质具有多种聚合物的宽分子量分布;一种具有在25℃下
水中溶解度小于或等于7重量%的溶剂,其数量足以使聚合物增塑并与之形成凝胶;以及一种有益的药剂。这些组合物具有明显改善的剪切变薄行为和减少的注射力,使它们可以通过注射轻松地植入病人身体表面下。