A comparison of methadone, buprenorphine and alpha2 adrenergic agonists for opioid detoxification: A mixed treatment comparison meta-analysis

ObjectivesThe aim of this systematic review was to compare the efficacy of methadone, buprenorphine, clonidine and lofexidine for opioid detoxification. Mixed treatment comparison meta-analyses were used to synthesise the data as it is designed for data-sets where limitations in standard pairwise meta-analyses make comparisons difficult to interpret.Data sourcesA systematic search was conducted using the following databases: CENTRAL, CINAHL, Embase, HMIC, Medline and PsycINFO.Review methodsRCTs that included opioid dependent participants over a mean age of 16 receiving opioid detoxification using buprenorphine, methadone, clonidine or lofexidine were included in the systematic review. Included studies were quality assessed and the completion of treatment data was extracted by the author and a research assistant independently. Mixed treatment comparison methods were used to synthesise the data.ResultsThere were 23 RCTs included in the systematic review (and 20 included in the meta-analysis) comprising a total of 2112 participants. Buprenorphine and methadone were ranked as the most effective methods of opioid detoxification followed by lofexidine and clonidine respectively.ConclusionBuprenorpine and methadone appear to be the most effective detoxification treatments. While the analysis suggests buprenorphine is the most effective method of detoxification there is some uncertainty on whether it is more effective than methadone and requires further research to confirm this result.