Fentanyl and Carfentanil

Heroin laced with fentanyl and carfentanil has appeared in illegal drug markets and is extremely dangerous for humans.


  • Used for pain management for Stage 4 cancer patients.
  • Ten times more potent than heroin.
  • Lethal dose of pure fentanyl is about the size of a few grains of salt.
  • From 2014 to 2015, fentanyl encounters more than doubled in the U.S. (from 5,343 to 13,882).


  • Now present in illegal U.S. drug markets.
  • 10,000 times more potent than morphine; 100 times more potent than fentanyl.
  • Depresses the central nervous system and ability to breathe.
  • Tiny particles (through nose, mouth, injection) can create life-threatening effects within minutes of exposure.

Photo of 2 milligrams carfentanil next to a penny

Image from Winnipeg Police Service

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