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Fatal intoxication with etonitazepyne, a novel synthetic opioid, highlights challenges in identifying these dangerous drugs in counterfeit medications. Early detection is crucial due to the significant health risks posed by nitazenes.

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Area of Science:

  • Forensic Toxicology
  • Pharmacology
  • Drug Abuse

Background:

  • Benzimidazole opioids, known as nitazenes, are emerging synthetic opioids with increasing recreational use.
  • Limited pharmacological and toxicological data complicates the identification and management of nitazene abuse.
  • Counterfeit medicines containing nitazenes pose a significant risk, often mistaken for legitimate pharmaceuticals.

Purpose of the Study:

  • To report a fatal intoxication case involving etonitazepyne, a nitazene compound.
  • To detail the analytical methodology used for identifying and quantifying etonitazepyne in biological samples and seized tablets.
  • To underscore the challenges in detecting nitazenes and the public health threat of counterfeit drugs.

Main Methods:

  • Development and application of a liquid chromatography-tandem mass spectrometry (LC-MSMS) method.
  • Analysis of biological samples (femoral blood, vitreous fluid) obtained during autopsy.
  • Toxicological screening of seized tablets suspected to contain etonitazepyne.

Main Results:

  • Etonitazepyne was identified and quantified in autopsy samples, with a femoral blood concentration of 0.32 ng/mL.
  • The analytical method successfully confirmed etonitazepyne in counterfeit tablets mistaken for oxycodone.
  • The detected blood concentration was within the lower range of previously reported fatal etonitazepyne cases.

Conclusions:

  • This case highlights the critical need for robust analytical methods to detect emerging synthetic opioids like nitazenes.
  • Counterfeit medications containing potent substances like etonitazepyne present a severe and often underestimated health risk.
  • Delayed identification of etonitazepyne due to lack of information and access to samples underscores challenges in forensic investigations.