Forensic Science International
Volume 198, Issue 1 , Pages 118-120, 20 May 2010

A reduction in blood morphine concentrations amongst heroin overdose fatalities associated with a sustained reduction in street heroin purity

  • Shane Darke

      Affiliations

    • National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
    • Corresponding Author InformationCorresponding author. Tel.: +61 2 9385 0333; fax: +61 2 9385 0222.
    • ,
  • Johan Duflou

      Affiliations

    • National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
    • Department of Forensic Medicine, Sydney South West Area Health Service, NSW, Australia
    • School of Medical Sciences, University of New South Wales, NSW, Australia
    • Central Clinical School, University of Sydney, NSW, Australia
    • ,
  • Michelle Torok

      Affiliations

    • National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia

Received 6 December 2009; received in revised form 19 January 2010; accepted 22 January 2010. published online 17 February 2010.

Abstract 

To determine the effects of a sudden and sustained reduction in heroin purity on the toxicology of heroin overdose, 959 consecutive heroin overdose cases autopsied at the NSW Department of Forensic Medicine (1/1/1998–31/12/2006) were analysed. There was a significant reduction in blood morphine concentration across the study period (β=−0.07), declining from a median of 0.50mg/L in the years 1998–2000 prior to 0.40mg/L in the period 2001–2006. There was no significant change in the proportion of alcohol positive cases, but the proportion of benzodiazepine positive cases increased across time (OR 1.11), as did methadone positive cases (OR 1.12). The decline in blood morphine concentrations remained significant after controlling for these factors (β=−0.07). In determining toxic and lethal morphine concentrations, the fact that the toxicology of overdose is responsive to changes in the opioid street market needs to be borne in mind.

Keywords: Toxicology, Opioids, Overdose, Morphine, Purity

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PII: S0379-0738(10)00040-X

doi:10.1016/j.forsciint.2010.01.015

Forensic Science International
Volume 198, Issue 1 , Pages 118-120, 20 May 2010

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