• Hye Won Lee, Ji Hee Jun, Ki-Jung Kil, Byong-Seob Ko, Choong Hwan Lee, and Myeong Soo Lee.
• KM Convergence Research Division, Korea Institute of Oriental Medicine, Republic of Korea.
• Maturitas. 2016 Mar 1; 85: 19-26.

AbstractDanggui Shaoyao San (DSS), a traditional herbal prescription, has long been used to treat menopause-related symptoms, including dysmenorrhea. We conducted a systematic review of randomized controlled trials to evaluate the efficacy of DSS for dysmenorrhea. We searched the following electronic databases through October 2015: PubMed; EMBASE; the Cochrane Library; AMED; five Korean databases (KoreaMed, DBPIA, OASIS, RISS, and KISS); three Chinese databases (CNKI, Wan Fang Database, and VIP), and one Japanese database (CiNii). The Cochrane criteria were used to assess the risk of bias for the individual studies. All randomized clinical trials (RCTs) of DSS or modified DSS were included. Data from all articles were extracted by two independent reviewers. Meta-analysis was used to pool the data. A total of 746 potentially relevant studies were identified, and four RCTs met our inclusion criteria. All of the included RCTs had a high risk of bias across their domains. Three RCTs showed favourable effects of DSS on response rate compared with conventional medicine, and a meta-analysis showed that DSS had superior effects compared to analgesics (RR: 1.31, 95%CI, 1.06-1.63, I(2)=73%). One RCT showed a beneficial effect of DSS on pain compared with placebo control. Our systematic review and meta-analysis provided suggestive evidence of the superiority of DSS over analgesics or placebo for dysmenorrhea. The quality of evidence for this finding was low to moderate because of a high risk of bias. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

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