New synthetic opioid cyclopropylfentanyl together with other novel synthetic opioids in respiratory insufficient comatose patients detected by toxicological analysis.Clin Toxicol (Phila). 2019 Sep; 57(9):806-812.CT
Introduction: Fentanyl derivatives like cyclopropylfentanyl have recently appeared on the recreational drug market. Cyclopropylfentanyl is probably a highly potent opioid, but human toxicological data are not available so far. Similar to other fentanyl derivatives the most serious acute health risk due to the use of cyclopropylfentanyl is likely to be respiratory depression. In case of overdose, this may lead to apnoea, respiratory arrest and death. In this paper, we present three cases of severe intoxication with cyclopropylfentanyl.