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    • 4. 发明授权
    • Dual control sustained release drug delivery systems and methods for
preparing same
    • 双重控制缓释药物递送系统及其制备方法
    • US5656296A
    • 1997-08-12
    • US476490
    • 1995-06-07
    • Sadath U. KhanPhyllis YingRussell U. NesbittMahdi B. FawziJay Weiss
    • Sadath U. KhanPhyllis YingRussell U. NesbittMahdi B. FawziJay Weiss
    • A61K9/20A61K9/28A61K9/32A61K9/24
    • A61K9/2013A61K9/2846A61K9/2866
    • The present invention pertains to a dual control sustained release drug delivery system which comprises a core and a porous coating layer over the core, wherein the coated core comprises (A) a core comprising in percentages by weight of the core composition (a) a medicament present in an amount from about 60% to about 90%; (b) an edible material having a melting point from about 25.degree. C. to about 100.degree. C. selected from the group consisting of (i) fatty acids having an iodine value from about 1 to about 10, (ii) natural waxes, (iii) synthetic waxes, and (iv) mixtures thereof, present in an amount from about 5% to about 40%; and (B) a porous coating layer over the core comprising in percentages by weight of the coating layer composition (a) a pH-independent water-insoluble polymer present in an amount from about 40% to about 80%; and (b) a water-soluble film forming polymer present in an amount from about 20% to about 60%.
    • 本发明涉及一种双重控制缓释药物递送系统,其包含核心上的核心和多孔涂层,其中涂覆的核心包含(A)核心组合物(a)的重量百分比的核心,药物 以约60%至约90%的量存在; (b)熔点约25℃至约100℃的可食用材料,其选自(i)碘值约1至约10的脂肪酸,(ii)天然蜡, (iii)合成蜡,和(iv)其混合物,其量为约5%至约40%; 和(B)核心上的多孔涂层,其包含重量百分比的涂层组合物(a),其以约40%至约80%的量存在; pH非依赖性水不溶性聚合物; 和(b)以约20%至约60%的量存在的水溶性成膜聚合物。