Loading page
Loading page
Loading substance route
Classified as habit-forming. As an extremely potent opioid and fentanyl analog, it carries significant potential for psychological addiction.
As an opioid classified as habit-forming, physical dependence is expected with regular use.
Specific lethal dose is unknown but expected to be extremely low given the drug's extreme potency. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics.
Potentially serious respiratory depression can occur during use and may be life-threatening, particularly given the extreme potency of this fentanyl analog.
4-Fluorobutyrfentanyl emerged as a designer drug sold online as part of the broader wave of synthetic opioid analogs appearing in illicit markets. Structurally, it is an analog of butyrfentanyl and is closely related to 4-fluorofentanyl, representing one of numerous modifications to the fentanyl…
Became a controlled substance in October 2015 as part of China's efforts to restrict synthetic opioid production and distribution.
Classified as a Schedule I controlled substance under federal law since February 1, 2018. This designation indicates high abuse potential with no accepted medical use.
Sweden's public health agency recommended classification as a hazardous substance on August 18, 2014. This designation restricts sale and possession under Swedish drug control legislation.