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A case of fatal poisoning by rifampicin
Abstract:
The toxicologic findings of a fatal poisoning with rifampicin (Rimactan) are presented. The concentration of rifampicin and its two major metabolites 25-desacetylrifampicin and 3-formylrifamycin in post-mortem blood, urine, bile and liver at about 10 h after ingestion of 14-15 g was determined using a high-performance liquid chromatographic method. The results of the toxicological analyses were compared with findings in fatal and non-fatal intoxications and after therapeutic administration of the drug. Possible explanation for the fatal outcome is given.
Insights
This study details a fatal rifampicin poisoning case. High concentrations of rifampicin and its metabolites were found in post-mortem samples, explaining the lethal outcome.
Area of Science:
- Toxicology
- Pharmacokinetics
Background:
- Rifampicin is a crucial antibiotic for treating tuberculosis.
- Overdose cases are rare but can be life-threatening.
Observation:
- A fatal poisoning case involving a large rifampicin (Rimactan) overdose (14-15 g) was analyzed.
- Post-mortem toxicological analysis was performed approximately 10 hours after ingestion.
Findings:
- High-performance liquid chromatography (HPLC) quantified rifampicin and its metabolites (25-desacetylrifampicin, 3-formylrifamycin) in blood, urine, bile, and liver.
- Concentrations were compared to therapeutic and other toxicological cases.
- Elevated levels of rifampicin and metabolites were identified as the cause of the fatal outcome.
Implications:
- This case highlights the severe toxicity of massive rifampicin overdose.
- Understanding toxicokinetics is vital for managing such poisoning events.
- Establishes reference concentrations for post-mortem forensic toxicology.