AGGLOMERATE OF SPHERICAL POLYVALENT-METAL ALGINATE PARTICULATES, CONTROLLED-RELEASE PREPARATION COMPRISING DIFFICULTLY SOLUBLE DRUG SUPPORTED ON SAID AGGLOMERATE, AND PROCESSES FOR PRODUCING THE BOTH

摘要

A process for producing a controlled-release preparation capable of rapidly dissolving out at least 99 % of a difficultly soluble drug having a low dissolution rate above the small intestine, which process comprises supporting a difficultly soluble drug having a low intestinal dissolution rate on an agglomerate of spherical polyvalent-metal alginate particulates wherein the specific surface area of the secondary particle ranges from 1 to 280 m<2>/g.