Postmortem changes of triazolam concentrations in body tissues.

Area of Science:

• Forensic Toxicology
• Pharmacokinetics
• Postmortem Analysis

Background:

• Accurate postmortem toxicological analysis is critical for determining drug ingestion and cause of death.
• Understanding drug distribution and degradation in various tissues after death is essential for reliable interpretation of results.
• Triazolam, a benzodiazepine, requires specific tissue analysis due to potential postmortem redistribution.

Purpose of the Study:

• To investigate postmortem changes in triazolam concentrations in rat tissues.
• To identify the most suitable tissue samples for reliable toxicological analysis of triazolam.
• To assess the impact of postmortem interval and storage conditions on triazolam levels in different tissues.

Main Methods:

• Rats were administered triazolam (5 mg/kg) orally and sacrificed.
• Tissue samples (spleen, abdominal muscle, liver, kidney, blood, lung, thigh muscle, brain) were collected at 0, 1, and 2 days postmortem.
• Triazolam concentrations were quantified using gas chromatography with a nitrogen phosphorus detector (GC-NPD).

Main Results:

• Triazolam concentrations significantly increased in the spleen, abdominal muscle, liver, and kidney postmortem.
• Slight increases in triazolam levels were observed in blood and lung tissues.
• No significant changes in triazolam concentration were detected in thigh muscle and brain tissues.
• Thigh muscle concentrations remained similar to initial blood samples, suggesting limited diffusion.

Conclusions:

• Postmortem diffusion of triazolam from the stomach into surrounding tissues occurs.
• Thigh muscle and brain tissue analysis, alongside blood, is recommended for accurate diagnosis of triazolam ingestion.
• These findings aid in optimizing postmortem toxicological strategies for triazolam.