Extended, controlled-release pharmaceutical compositions using charged polymers
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United States of America Patent
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Apr 23, 2013
Grant Date -
Nov 13, 2003
app pub date -
Apr 28, 2003
filing date -
Oct 29, 2001
priority date (Note) -
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Abstract
The present invention relates to a delivery system for pharmaceutical compositions relying in part on an ionic interaction to control and facilitate release of the treating agent. More specifically, the invention relates to an extended controlled-release system having an ionic treating agent and an ionic polymer, wherein the polymer is sufficiently ionized to release the treating agent in a controlled manner over an extended period of time and the composition does not require an emulsion system for administering the treating agent.
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