Coroner's Finding: GEAR David Richmond
Deceased
David Richmond Gear
Demographics
34y, male
Date of death
1999-12-31
Finding date
2001-10-05
Cause of death
Mixed methadone and thioridazine toxicity
AI-generated summary
A 34-year-old man died in prison from mixed methadone and thioridazine toxicity. He was on methadone maintenance (110mg daily) for opioid addiction and was prescribed thioridazine 100mg nightly for depression. Post-mortem toxicology showed toxic methadone levels (1.9mg/L) and therapeutic thioridazine despite stable dosing for months. The coroner accepted expert evidence that both drugs contributed to death, with thioridazine potentially causing cardiac arrhythmia and methadone causing respiratory depression during sleep. Medical management was not criticised—methadone maintenance is appropriate for high-risk relapse patients, and thioridazine's cardiac risks were not widely known in 1999. Subsequent knowledge about thioridazine-induced arrhythmias led to the drug being discontinued at the prison. No preventable errors in prescribing or administration were identified.
AI-generated summary and tagging — may contain inaccuracies; refer to original finding for legal purposes.
Drugs involved
Contributing factors
- Methadone blood level in toxic range (1.9mg/L)
- Thioridazine cardiotoxicity with risk of arrhythmia
- Combined sedative and CNS depressant effects of both drugs
- REM sleep-related respiratory muscle paralysis
- Possible underlying cardiomyopathy suggested by enlarged flabby heart chambers
- Prior ECG abnormalities in 1998 potentially predisposing to arrhythmia
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