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- W2601256495 abstract "The number of new psychoactive substances (NPS) introduced through the online recreational drugs market increases continuously. This report from the Swedish STRIDA project describes analytically confirmed intoxications involving the novel fentanyl analogs acrylfentanyl, 4-chloroisobutyrfentanyl (4Cl-iBF), 4-fluoroisobutyrfentanyl (4F-iBF), and tetrahydrofuranfentanyl (THF-F), and cyclopentylfentanyl in a drug product.Patients with suspected NPS exposure presenting in emergency departments (ED) or intensive care units (ICU) in Sweden and requiring hospital care are invited to the STRIDA project. NPS analysis of serum and urine samples was performed by multi-component liquid chromatography-mass spectrometry. Data on clinical features were retrieved from telephone consultations with the Swedish Poisons Information Centre and from medical records.Between April and October 2016, eleven intoxications involving acrylfentanyl (8 cases), acrylfentanyl together with 4Cl-iBF (1), 4F-iBF (1), and THF-F (1) were analytically confirmed. Patients were aged 19-51 (median 28) years and 91% were men. Six (55%) were monitored at the ED, and five admitted to the ICU. Typical clinical features were decreased consciousness, respiratory depression, and miosis. In 8 cases, the antidote naloxone was administered to counter the opioid effects. The 4F-iBF positive patient eventually died of brain edema. The serum acrylfentanyl concentration (n = 8) ranged 0.5-2.1 (median 0.9) ng/mL, and in urine (n = 9) 0.2-10.5 (mean 4.6, median 5.2) μg/mmol creatinine. For 4Cl-iBF, 4F-iBF, and THF-F (n = 1 each), higher serum (5-45 ng/mL) and urine (11-136 μg/mmol creatinine) concentrations were found. Other NPS (e.g., flunitrazolam) and/or classical drugs were detected in five cases. In early 2016, nasal sprays with a claimed content of acrylfentanyl brought to hospital by patients or obtained by test purchase were demonstrated to instead contain fentanyl.Potentially life-threatening opioid toxicity was seen in 11 acute intoxications involving the fentanyl analogs acrylfentanyl, 4Cl-iBF, 4F-iBF, and THF-F, which are available through open Internet trading. All patients were supported with acute and intensive hospital care, and naloxone was effective to reverse the opioid symptoms. One patient died of brain edema." @default.
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- W2601256495 date "2017-03-28" @default.
- W2601256495 modified "2023-10-14" @default.
- W2601256495 title "Intoxications involving acrylfentanyl and other novel designer fentanyls – results from the Swedish STRIDA project" @default.
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- W2601256495 doi "https://doi.org/10.1080/15563650.2017.1303141" @default.
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