BUY Thenylfentanyl Powder Thenylfentanyl Powder is a fentanyl analog. It was temporarily placed in the US Schedule I by emergency scheduling
Trefentanil is most similar to short-acting fentanyl analogues such as alfentanil. In comparative studies, trefentanil was slightly more potent and shorter acting than alfentanil as an analgesic, but induced significantly more severe respiratory depression. For this reason trefentanil has not been adopted for clinical use, although it is still used in research.