Furanyl fentanyl (Fu-F) is an opioid analgesic that is an analog of fentan and has been sold online as a designer drug.It has an ED50 value of 0.02mg/kg in mice. Furanylfentanyl, or as it could be found in the Internet, Fu-F is an analogous substance to popular research chemical Fentanyl. Fu-F drug represents a powerful opioid research chemicals and available for sale for research and forensic purposes. Comparing Furanylfentanyl with Fentanyl, it is not so potent (Fentanyl is considered 5 times stronger).
Among Furanylfentanyl side effects users observe nausea and depression. Remember to follow Furanylfentanyl dosage to avoid negative Furanylfentanyl effects. If you choose a light dose you can experience effects similar to Butyrfentanyl. In case of Furanylfentanyl bad trip or overdosing there is a risk for life.