The efficacy and safety of yukmijihwang-hwan (Liuweidihuang-wan) for type 2 diabetes mellitus without complications A protocol for systematic review and meta-analysis

Background: This systematic review and meta-analysis of randomized controlled trials (RCTs) will aim to assess the efficacy and safety of Yukmijihwang-hwan for type 2 diabetes without complications. Methods: To identify eligible studies, we will perform a systematic search of the following electronic databases: MEDLINE (PubMed), EMBASE, the Cochrane Central Register of Controlled Trials, China National Knowledge Infrastructure, Citation Information by NII, Korean Information Service System, Korean Medical Database, Oriental Medicine Advanced Searching Integrated System, and ScienceON. Search terms will include "Type 2 Diabetes" for participants as well as "Yukmijihwang-tang" or "Liuwei dihuang tang" for interventions. Two independent researchers will perform data extraction and assessment using Cochrane's risk of bias tool, with disagreements being resolved through discussions with a third researcher. Results: This study will evaluate the antidiabetic effects of Yukmijihwang-hwan from 3 perspectives (blood glucose level, insulin resistance, and beta-cell function) as well as its safety by reviewing the reported adverse effects. Conclusion: This systematic review will provide evidence regarding the antidiabetic efficacy and safety of Yukmijihwang-tang in type 2 diabetes mellitus.