Transdermal administration of fentanyl and device therefor

  • US 4,588,580 A
  • Filed: 07/23/1984
  • Issued: 05/13/1986
  • Est. Priority Date: 07/23/1984
  • Status: Expired due to Term
First Claim
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1. A process for inducing and maintaining analgesia which comprises administering through an area of intact skin, a skin permeable form of a material selected from the group consisting of fentanyl and its analgetically effective derivatives at an analgetically effective rate and continuing the administration of said material at said rate for an extended period of time at least sufficient to induce analgesia.

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