What is Carfentanil?

Carfentanil is a synthetic opioid drug approximately 10,000 times more potent than morphine and 100 times more potent than fentanyl, which itself is 50 times more potent than heroin. Usually used as a tranquilizing agent for elephants and other large mammals, the strength of the drug presents a serious risk in even very small quantities. The drug can be inhaled or absorbed through the skin, and extreme caution should be used when handling. It is often mixed with heroin and other street drugs.

Carfentanil can come in several forms, including powder, blotter paper, tablets, patch, and spray. Some forms can be absorbed through the skin or accidentally inhaled. Due to the strength of the drug, if exposure is suspected call emergency services immediately, as the drug works very quickly. The lethal dose range is unknown for humans.

Overdose Prevention Resources


  • Respiratory Depression or Arrest
  • Drowsiness
  • Disorientation
  • Sedation
  • Pinpoint Pupils
  • Clammy Skin

**Onset of symptoms usually occurs within minutes of exposure.  Call 911 immediately if you think you or a family member has been exposed to Carfentanil.