HUMIDITY-RESISTANT DRUG FORMULATIONS AND METHODS OF PREPARATION THEREOF
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United States of America Patent
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Issued Date -
May 12, 2011
app pub date -
Mar 10, 2009
filing date -
Mar 10, 2008
priority date (Note) -
Abandoned
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Abstract
The invention relates to a pharmaceutical composition of a humidity-sensitive core comprising an active ingredient or pharmaceutically acceptable salt thereof; a coating over the core, the coating containing a cationic polymer; and an additional coating over the cationic polymer-containing coating, with the additional coating including an acidifying agent. Also, methods for preparing such compositions wherein a cationic polymer containing coating is applied over a humidity-sensitive core that contains the active ingredient or pharmaceutically acceptable salt thereof; and then an additional coating is applied over the cationic polymer containing coating.
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