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Sudden death and benzodiazepines

O H Drummer1, D L Ranson

  • 1Department of Forensic Medicine, Victorian Institute of Forensic Medicine, Monash University, Southbank, Australia.

The American Journal of Forensic Medicine and Pathology
|December 1, 1996
PubMed
Summary
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Benzodiazepine toxicity caused 16 deaths over 5 years, primarily through suicide. Flunitrazepam may pose a higher risk of fatal misuse compared to other benzodiazepines.

Area of Science:

  • Forensic Toxicology
  • Clinical Pharmacology

Background:

  • Examined 16 deaths linked to toxic benzodiazepine concentrations over a 5-year period.
  • Excluded cases with co-ingested substances like ethanol to isolate benzodiazepine effects.

Observation:

  • All cases underwent comprehensive macroscopic, microscopic, and toxicological examinations.
  • Preexisting natural diseases were present in 11 cases; 5 deaths were solely attributed to benzodiazepines.
  • Suicide was the cause of death in 14 out of 16 cases.

Findings:

  • Nitrazepam and temazepam were the most frequently detected benzodiazepines.
  • Oxazepam and flunitrazepam were also prevalent.
  • Established minimum toxic femoral blood concentrations for 7-aminonitrazepam (0.5 mg/L), 7-aminoflunitrazepam (0.2 mg/L), and oxazepam (2 mg/L).

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Implications:

  • Findings suggest flunitrazepam may have a higher inherent toxicity upon misuse compared to other benzodiazepines.
  • Highlights the critical role of forensic toxicology in determining drug-related fatalities.
  • Informs public health strategies regarding benzodiazepine prescription and misuse, particularly in Australia.