Sublingual fentanyl spray and methods of treating pain

  • US 8,835,460 B2
  • Filed: 05/15/2013
  • Issued: 09/16/2014
  • Est. Priority Date: 01/25/2006
  • Status: Active Grant
First Claim
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1. A sublingual formulation comprising discrete liquid droplets of an effective amount of fentanyl or a fentanyl derivative selected from the group consisting of sufentanil, carfentanil, lofentanil and alfatenil, a free base or a pharmaceutically acceptable salt thereof, in a pharmaceutically acceptable liquid carrier;

  • said droplets having a mean diameter of from about 30 to about 70 microns.

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