Transdermal and transmucosal preparations
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United States of America Patent
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Issued Date -
Jul 19, 2007
app pub date -
Feb 22, 2005
filing date -
Oct 7, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Transdermal and transmucosal preparations are often insufficiently absorbed. Thus, there is a need for additives that can enhance the transdermal and/or transmucosal absorption of various drugs. The present invention provides compositions for enhancing transdermal and/or transmucosal absorption, comprising a hydroxyapatite and essential ingredients. The hydroxyapatite has a maximum particle size of 1 .mu.m or less, preferably 0.1 .mu.m or less, and the content of the hydroxyapatite relative to a drug to be formulated ranges from 0.1 to 1000 weight percent.
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