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Abuse deterrent transdermal formulations of opiate agonists and agonist-antagonists

  • US 8,481,560 B2
  • Filed: 04/04/2011
  • Issued: 07/09/2013
  • Est. Priority Date: 04/02/2010
  • Status: Active Grant
First Claim
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1. An abuse-resistant patch for transdermally delivering an opioid to a subject, comprising:

  • (a) a backing layer;

    (b) a first layer underlying the backing layer, the first layer comprising;

    an opioid antagonist or opioid antagonist prodrug which is not transdermally delivered at therapeutic levels when the patch is used for transdermally administering the opioid to the subject;

    wherein the backing layer is substantially impermeable to the opioid antagonist or opioid antagonist prodrug of the first layer;

    (c) a second layer underlying the first layer, the second layer comprising;

    (i) an opioid selected from the group consisting of;

    an opioid agonist, an opioid agonist prodrug, an opioid agonist-antagonist and an opioid agonist-antagonist prodrug;

    (ii) a pressure sensitive adhesive;

    wherein the second layer is adapted to be in diffusional communication with the skin of the subject to transdermally administer a therapeutically effective amount of the opioid to the subject; and

    (d) a barrier layer located between the first and second layer, the barrier layer comprising;

    a water-insoluble polymeric material and a water-soluble polymer;

    wherein the release ratio is between about 1;

    60 and about 60;

    1 after the patch has been placed in ethanol, water or a phosphate buffer having a pH of about 6.5 for greater than about 30 seconds.

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