The purpose of this technical report is to provide an analysis of the available information on N,N-diethyl-2-[[4-(1-methylethoxy)phenyl]methyl]-5-nitro-1H-benzimidazole-1-ethanamine (commonly known as isotonitazene), an opioid analgesic that has recently emerged on the drug market in Europe, to support a risk assessment of the substance that has been requested by the European Commission in accordance with Article 5c of Regulation (EC) No 1920/2006 (as amended).

[Explanatory note: In the interests of public health protection the EMCDDA is releasing this report before formal copy editing and page layout in the EMCDDA house style. The final report will be available in due course.]