Pharmaceutical tablets releasing the active substance after a definite period of time
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United States of America Patent
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Nov 7, 1995
Grant Date -
N/A
app pub date -
May 24, 1994
filing date -
May 24, 1994
priority date (Note) -
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Abstract
Pharmaceutical tablets releasing the active substance after a definite period of time, consisting of: a core containing the active substance and polymeric substances which swell and/or gel and/or erode on contact with water or with aqueous liquids; a layer applied externally to said core, suitable to prevent the immediate release of the active substance contained in the core and to allow the release of said active substance after a definite period of time, consisting of natural and/or synthetic polymeric materials of the class of the hydrophilic polymers which erode and/or gel and/or dissolve in an aqueous medium; a possible gastroresistant and enterosoluble coating.
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