Catherine Anne Viergever, aged 61, died from a gunshot injury to the head inflicted by her husband on 29 March 2010 at their Mount Macedon home. Contributing factors included sertraline toxicity, benzodiazepine use, and alcohol consumption, which likely decreased her conscious state. The coroner found elevated sertraline levels (0.7 mg/L) along with diazepam and blood ethanol (0.06 g/100mL). Mrs Viergever was breathing during the subsequent house fire, evidenced by carboxyhaemoglobin saturation of 42% and cyanide levels. The clinical lesson is the importance of monitoring medication levels and drug interactions in patients on multiple central nervous system depressants, particularly antidepressants and benzodiazepines, as elevated sertraline combined with alcohol and benzodiazepines significantly impairs consciousness and protective reflexes. No medical intervention could have prevented this outcome.
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