Details for Patent: 6,881,208

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Summary for Patent: 6,881,208

Title:	Method and device for transdermal electrotransport delivery of fentanyl and sufentanil
Abstract:	The invention provides an improved electrotransport drug delivery system for analgesic drugs, namely fentanyl and sufentanil. The fentanyl/sufentanil is provided as a water soluble salt (eg, fentanyl hydrochloride) dispersed in a hydrogel formulation for use in an electrotransport device (10). In accordance with one aspect of the invention, the concentration of fentanyl/sufentanil in the donor reservoir (26) solution is above a predetermined minimum concentration, whereby the transdermal electrotransport flux of fentanyl/sufentanil is maintained independent of the concentration of fentanyl/sufentanil in solution. In accordance with a second aspect of the present invention, the donor reservoir (26) of the electrotransport delivery device (10) is comprised of silver and the donor reservoir (26) contains a predetermined "excess" loading of fentanyl/sufentanil halide to prevent silver ion migration with attendant skin discoloration. In accordance with a third aspect of the present invention, a transdermal electrotransport delivered dose of fentanyl/sufentanil is provided which is sufficient to induce analgesia in (eg, adult) human patients suffering from moderate-to-severe pain associated with major surgical procedures.
Inventor(s):	Phipps; Joseph B. (Maple Grove, MN), Southam; Mary (Portola Valley, CA), Bernstein; Keith J. (Somerville, NJ), Noorduin; Henk (Bergen op Zoom 4615 HM, NL)
Assignee:
Application Number:	08/465,492
Patent Claim Types: see list of patent claims	Use; Delivery; Device; Formulation;

Drugs Protected by US Patent 6,881,208

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