Patent ID: 6294201
Filing Date: 2001-09-25
Classification: A61K,A61P

Abstract:
Osmotic drug release system comprising:(a) a shell comprising a material that is water-permeable but inpermeable to the components of the core, with at least one opening, and(b) a core, comprising15 to 35% in weight of a pharmaceutically active substance20 to 50% in weight of xanthan10 to 30% in weight of a vinyl pyrrolidone--vinyl acetate copolymerwherein additional components selected from a group consisting of other hydrophilic expandable polymers, osmotically active additives and pharmaceutically acceptable additive materials may also be contained in said core so that the sum of the core components totals 100% in weight, wherein the percent in weight figures refer to the total weight of the core components.