Sublingual fentanyl spray and methods of use to treat pain

  • US 9,642,797 B2
  • Filed: 02/12/2016
  • Issued: 05/09/2017
  • Est. Priority Date: 01/25/2006
  • Status: Active Grant
First Claim
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1. A sublingual formulation comprising from about 0.1% to about 0.9% by weight fentanyl, a free base or a pharmaceutically acceptable salt thereof, or a derivative thereof, from about 20% to about 60% by weight ethanol and from about 4% to about 6% by weight propylene glycol.

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