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Methadone-related deaths. A ten year overview
Claudia Vignali1, Cristiana Stramesi1, Luca Morini1
1Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Via Forlanini, 12, 27100 Pavia, Italy.
Fatal methadone poisoning cases have significantly increased, accounting for a third of heroin deaths. Underestimated risks and take-home doses contribute to this rise in methadone-related fatalities.
Area of Science:
- Toxicology
- Public Health
- Pharmacology
Background:
- A notable increase in fatal methadone poisoning cases has been observed over the past decade.
- Methadone-related deaths represent approximately one-third of all heroin-related fatalities in the district.
Purpose of the Study:
- To investigate the reasons behind the significant rise in methadone-related deaths.
- To analyze the contributing factors to methadone poisoning in both treated and non-prescribed users.
Main Methods:
- Retrospective analysis of 36 fatal methadone poisoning cases over 10 years.
- Comparison of methadone blood concentrations between patients in maintenance programs and non-prescribed users.
- Review of prescribing practices and take-home dose policies.
Main Results:
- 66.7% of fatalities involved patients in methadone maintenance programs; 33.3% were non-prescribed users.
- Average blood methadone concentration was 1.06 mg/L in maintenance patients versus 0.79 mg/L in non-prescribed users.
- Clinicians often underestimate methadone risks, with take-home doses increasing abuse potential.
Conclusions:
- Methadone-related deaths are a significant public health concern, often linked to underestimation of risks by prescribers.
- Inadequate consideration of opiate tolerance and the widespread availability of take-home doses exacerbate the risk of methadone misuse, abuse, and diversion.
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