Modified release dosage forms
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United States of America Patent
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Issued Date -
Dec 2, 2004
app pub date -
May 28, 2004
filing date -
Sep 28, 2001
priority date (Note) -
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Abstract
A dosage form comprises: (a) a core comprising at least one active ingredient; and (b) a molded shell which surrounds the core, wherein the shell provides a predetermined time delay of greater than one hour for the onset of dissolution of the active ingredient upon contacting of the dosage form with a liquid medium and the delay is independent of the pH of the liquid medium. The weight of the shell may be at least 50 percent of the weight of the core, and the shell may have a thickness of about 500-4000 microns, or be substantially free of pores having a diameter of 0.5 to 5 microns.
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