Acupuncture combined with medication for opioid use disorder in adults: a protocol for systematic review and meta-analysis.

introductionOpioid use disorder (OUD) is a worldwide health problem. Clinical trials indicated that acupuncture combined with medication is effective in OUD, however, there are different conclusions presented by previous trials. This study is designed to evaluate the efficacy and safety of acupuncture combined with medication in OUD. METHODS AND ANALYSIS: PubMed, CENTRAL, Embase, Web of Science, CINAHL, PsycINFO, ProQuest Dissertation and Theses, AMED, OpenGrey, Clinicaltrials.gov and who.int/trialsearch will be searched in September 2019 without a language restriction. Randomised controlled trials (RCTs) and quasi-RCTs which included participants with OUD receiving acupuncture therapy combined with medication versus control group will be included in this study. Two reviewers will independently screen studies, extract data, assess risk of bias by the Cochrane risk of bias assessment tool and assess quality of evidence by Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach. Any disagreements will be arbitrated by the third reviewer. Data synthesis and analysis will be conducted by using RevMan V.5.3. Subgroup analyses, sensitivity analysis, meta-regression and reporting bias assessment will be conducted if necessary and appropriate. ETHICS AND DISSEMINATION: On account of the nature of this systematic review and meta-analysis, ethical approval is not required. The results will be published in a peer-reviewed journal. PROSPERO REGISTRATION NUMBER: CRD42019123436.