申请人:Merck & Co., Inc.
公开号:US20020136744A1
公开(公告)日:2002-09-26
The present invention is related to a drug delivery device, that is pH insensitive, for the sustained in situ production and release of a dispersion, in an environment of use, which comprises
a) a compressed core prepared from an admixture comprising
i) a therapeutically effective amount of a beneficial agent that has a solubility profile that is dependent on the pH level of the environment of use;
ii) a water swellable polymer which upon hydration forms gelatinous microscopic particles; and
iii) a pH modulator; and
b) a water insoluble, water impermeable polymeric coating comprising a polymer and a plasticizer, which surrounds and adheres to the compressed core, said water insoluble, water impermeable polymeric coating having at least one aperture.
本发明涉及一种药物输送装置,该装置对pH值不敏感,用于在使用环境中持续原位生产和释放分散体,包括:a)从混合物中制备的压缩核心,该混合物包括i)治疗有效量的有益药物,其溶解度取决于使用环境的pH水平;ii)水肿胀聚合物,其在水合后形成凝胶状的微观颗粒;和iii)pH调节剂;以及b)水不溶性、水不渗透的聚合物涂层,包括聚合物和可塑剂,该涂层包围并粘附在压缩核心上,该水不溶性、水不渗透的聚合物涂层具有至少一个孔。