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Methadone dose and heroin use during maintenance treatment
J R Caplehorn1, J Bell, D G Kleinbaum
1Department of Public Health, University of Sydney, Australia.
Addiction (Abingdon, England)
|January 1, 1993
Summary
Higher methadone doses correlate with reduced heroin use in patients undergoing maintenance treatment. Increasing methadone dosage by 1 mg may decrease the odds of heroin use by 2%.
Area of Science:
- Addiction medicine
- Pharmacology
- Public health
Background:
- Opioid maintenance therapy (OMT) is a cornerstone in treating opioid use disorder.
- Methadone is a widely used medication for OMT.
- Understanding the dose-response relationship is crucial for optimizing treatment outcomes.
Purpose of the Study:
- To investigate the association between prescribed methadone dosage and ongoing heroin use.
- To quantify the impact of methadone dose on treatment adherence.
Main Methods:
- Retrospective cohort study of 62 patients in an Australian OMT program.
- Longitudinal data analysis using Zeger & Liang's method (1986).
- Urine drug screens and methadone dosage data collected over a maximum of two years.
Main Results:
- A 2% reduction in the relative odds of heroin use for every 1 mg increase in methadone dose.
- Patients on 40 mg methadone had 2.2 times the odds of heroin use compared to those on 80 mg.
- Findings remained significant after accounting for patient characteristics and sample collection time.
Conclusions:
- Higher methadone maintenance doses are associated with decreased heroin use.
- This suggests a dose-dependent effect of methadone in reducing illicit opioid consumption.
- Optimizing methadone dosage may improve treatment efficacy in OMT programs.