Controlled release pharmaceutical compositions for the oral administration containing nifedipine as active substance
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United States of America Patent
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Feb 16, 1999
Grant Date -
N/A
app pub date -
Sep 9, 1997
filing date -
Sep 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Controlled release pharmaceutical compositions for the oral administration of nifedipine are disclosed which comprise an amorphous coprecipitate of nifedipine and polyvinylpyrrolidone with suitable excipients. The release rate may be varied from 8 to 24 hours by varying the amounts of the cellulose derivative, the carboxypolymethylene and the lactose.
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