Multi-layer preparation in film form, consisting of hydrophilic polymers, for the rapid release of active ingredients
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United States of America Patent
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Sep 28, 2010
Grant Date -
Mar 6, 2008
app pub date -
Oct 31, 2007
filing date -
Nov 11, 1999
priority date (Note) -
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Abstract
A multilayer preparation in the form of films of hydrophilic polymers for rapid release of substances present in the film layers into liquid surroundings is characterized in that adjacent layers differ from one another in that in each case one layer is soluble in a nonaqueous solvent in which the respective adjacent layer is insoluble or only slightly soluble.
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