For those who want to put those Fentanyl and Norfentanyl levels in context:
“Overdose results in respiratory depression which is reversible with naloxone. Sudden death can also occur because of cardiac arrest or severe anaphylactic reaction. The estimated lethal dose of fentanyl in humans is 2 mg. The recommended serum concentration for analgesia is 1–2 ng/ml and for anaesthesia it is 10–20 ng/ml. Blood concentrations of approximately 7 ng/ml or greater have been associated with fatalities where poly-substance use was involved. While fatalities have been reported after therapeutic use, many deaths have occurred as a result of the misuse of pharmaceutical products. Both used and unused fentanyl patches have been injected, smoked, snorted or taken orally with fatal consequences.”
For those who want to put those Fentanyl and Norfentanyl levels in context:
ReplyDelete“Overdose results in respiratory depression which is reversible with naloxone. Sudden death can also occur because of cardiac arrest or severe anaphylactic reaction. The estimated lethal dose of fentanyl in humans is 2 mg. The recommended serum concentration for analgesia is 1–2 ng/ml and for anaesthesia it is 10–20 ng/ml. Blood concentrations of approximately 7 ng/ml or greater have been associated with fatalities where poly-substance use was involved. While fatalities have been reported after therapeutic use, many deaths have occurred as a result of the misuse of pharmaceutical products. Both used and unused fentanyl patches have been injected, smoked, snorted or taken orally with fatal consequences.”
https://www.emcdda.europa.eu/publications/drug-profiles/fentanyl
Cotinine is a metabolite of Nicotine.