Chitosan biopolymer for the topical delivery of active agents
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United States of America Patent
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N/A
Issued Date -
Nov 6, 2003
app pub date -
Sep 9, 2002
filing date -
Dec 22, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a carrier base for the topical delivery of an active agent comprising a high viscosity chitosan biopolymer. The invention further relates to a method of controlling the release of an active agent from a carrier base, comprising as a carrier base a high viscosity chitosan; providing the active agent; and mixing the active agent and the chitosan. Preferably, the carrier base comprises a high viscosity chitosan having a molecular weight of at least about 100,000 Dalton, more preferably at least about 250,000 Dalton and most preferably at least about 300,000 Dalton. In other preferred embodiments the chitosan has a concentration of at least about 2 weight %.
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