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Iontophoretic drug delivery

  • US 5,573,503 A
  • Filed: 04/30/1993
  • Issued: 11/12/1996
  • Est. Priority Date: 10/29/1984
  • Status: Expired due to Term
First Claim
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1. An iontophoretic electrode for delivery of as an ionic drug having a positive charge, comprising:

  • a reservoir containing a positively charged ionic drug compounded with a negatively charged counterion, said reservoir comprised of a hydrophilic polymer, which when hydrated is permeable to said ionic drug, and which is substantially free of competing cations;

    an electrically conductive member comprising a material that is readily oxidizable to form a positively charged ionic species differing from said positively charged ionic drug, when said conductive member is in contact with said reservoir and a positive voltage is applied to said conductive reservoir.

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