water intoxication and olanzapine toxicity in association with schizophrenia
AI-generated summary
A 37-year-old Aboriginal male prisoner with a long history of treatment-resistant schizophrenia died at the Darwin Correctional Precinct. He was on high-dose olanzapine (15mg twice daily) and zuclopenthixol when he developed acute water intoxication and died from a seizure. Toxicology revealed olanzapine concentration of 0.40mg/L, consistent with fatal overdose cases. He had reported excessive thirst and consumed large quantities of water in weeks before death. The coroner found his death resulted from combined water intoxication and olanzapine toxicity, with the precise mechanism difficult to separate. Care was deemed appropriate despite his rare presentation of psychogenic polydipsia (excessive water drinking), not yet well-recognised in custodial settings. Resuscitation attempts were hampered by excessive pulmonary fluid. The coroner found no causative failures in medical care but noted the Top End Health Service appropriately implemented improvements.
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