Multilayered controlled release pharmaceutical dosage form
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United States of America Patent
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Mar 7, 1995
Grant Date -
N/A
app pub date -
Mar 23, 1994
filing date -
Mar 23, 1994
priority date (Note) -
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Abstract
This invention is directed to a multilayered controlled release pharmaceutical dosage form. More particularly the dosage form is adapted for water soluble drugs and comprises a plurality of coated particles wherein each has multiple layers about a core containing a drug active whereby the drug containing core and at least one other layer of drug active is overcoated with a controlled release barrier layer and preferably an outer layer of additional drug is adapted for immediate release to preferably provide one immediate releasing layer and at least two controlled releasing layers of a water soluble drug from the multilayered coated particle.
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