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Hydrogel-Driven Drug Dosage Form

  • US 20020015731A1
  • Filed: 12/20/2000
  • Published: 02/07/2002
  • Est. Priority Date: 12/23/1999
  • Status: Abandoned Application
First Claim
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1. A controlled release drug dosage form comprising a core and a coating around said core wherein:

  • (a) said core comprises a drug-containing composition and a water-swellable composition, each occupying separate regions within said core;

    (b) said drug-containing composition comprises a drug, a swelling agent, and a drug-entraining agent;

    (c) said coating is water-permeable, water-insoluble, and has at least one delivery port therethrough;

    (d) said swelling agent has a swelling ratio of at least 3.5; and

    (e) said drug-entraining agent comprises at least 15 wt % of said drug-containing composition.

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