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Coroner's Finding: Steer, Marianne

Deceased

Marianne Steer

Demographics

56y, female

Date of death

2017-09-23

Finding date

2020-05-19

Cause of death

combined drug toxicity (methadone, diazepam, amitriptyline and mirtazapine); pulmonary hypertension and damaged lungs contributed

AI-generated summary

Marianne Steer, 56, died from combined drug toxicity involving methadone, diazepam, amitriptyline, and mirtazapine. She had a long history of substance dependence and had voluntarily ceased methadone treatment five months prior to death. She obtained methadone illegally and injected it intravenously—a highly dangerous practice she had engaged in for years. The coroner found her death accidental, not intentional. While her treating doctors had prescribed diazepam and other CNS depressants, the primary cause was the illicitly obtained methadone combined with prescribed medications. The coroner noted that although prescribing practices warrant general scrutiny, there was insufficient causal connection to warrant formal investigation of her own doctors' decisions. Key clinical lesson: methadone takeaway prescriptions require strict adherence to guidelines; supervised dosing should be the norm, with takeaway doses only exceptional.

AI-generated summary and tagging — may contain inaccuracies; refer to original finding for legal purposes.

Contributing factors

  • intravenous injection of illicitly obtained methadone
  • concurrent use of multiple CNS depressants
  • chronic obstructive pulmonary disease with pulmonary hypertension
  • long history of substance dependence
  • diversion and misuse of take-away methadone dose
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This page reproduces or summarises information from publicly available findings published by Australian coroners' courts. Coronial is an independent educational resource and is not affiliated with, endorsed by, or acting on behalf of any coronial court or government body.

Content may be incomplete, reformatted, or summarised. All court orders for redaction and non-publication are respected; documents with technically defective redaction have been excluded from the database entirely. Always refer to the original court publication for the authoritative record.

Copyright in original materials remains with the relevant government jurisdiction. AI-generated summaries and tagging are for educational purposes only, may contain inaccuracies, and must not be treated as legal documents. We welcome feedback for correction —