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Drug Alcohol Depend. 2002 Feb 1;65(3):283-90.

Retention rate and illicit opioid use during methadone maintenance interventions: a meta-analysis.

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  • 1Pharmacology Unit (Institut Municipal d'Investigacio Mèdica-IMIM), Carrer Doctor Aiguador 80, E-08003, Barcelona, Spain. mfarre@imim.es

Abstract

The efficacy of methadone maintenance in opioid addiction was assessed in terms of programme retention rate and reduction of illicit opioid use by means of a meta-analysis of randomised, controlled and double blind clinical trials. The results were compared with interventions using buprenorphine and levo-acetylmethadol (LAAM). Trials were identified from the PubMed database from 1966 to December 1999 using the major medical subject headings 'methadone' and 'randomised controlled trial'. Data for a total of 1944 opioid-dependent patients from 13 studies were analysed. Sixty-four percent of patients received methadone, administered either as fixed or adjusted doses. Thus, 890 patients received > or = 50 mg/day (high dose group) and 392 were given < 50 mg/day (low dose group). Of 662 controls, 131 received placebo, 350 buprenorphine (265 at doses > or = 8 mg/day and 85 at doses < 8 mg/day) and 181 LAAM. High doses of methadone were more effective than low doses in the reduction of illicit opioid use (odds ratio [OR] 1.72, 95% confidence interval [CI] 1.26--2.36). High doses of methadone were significantly more effective than low doses of buprenorphine (< 8 mg/day) for retention rates and illicit opioid use, but similar to high doses of buprenorphine (> or = 8 mg/day) for both parameters. Patients treated with LAAM had more risk of failure of retention than those receiving high doses of methadone (OR 1.92, 95% CI 1.32--2.78). It is proposed that in agonist-maintenance programmes, oral methadone at doses of 50 mg/day or higher is the drug of choice for opioid dependence.

PMID:
11841899
[PubMed - indexed for MEDLINE]
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