| Study (year) | Study design | Inclusion criteria | Herbs | Overall bias |
| Du, 2009 [23] | RCT | HD | Tufulin, chuanxiong, baizhi, baixianpi, difuzi, kushen, jingjie, xixin, danggui, chantui | High |
| Du et al., 2004 [24] | RCT | HD | Tufulin, chuanxiong, baixianpi, difuzi, heshouwu, kushen, jingjie, xixin, danggui | High |
| Gao and Ye, 2012 [25] | RCT | HD | Tufulin, dahuang, baixianpi, difuzi, heshouwu, fangfeng, taoren, mahuang, danshen, jixueteng | High |
| Guo et al., 2009 [26] | RCT | HD | Dahuang, chuanxiong, danshen, baixianpi, difuzi, honghua, kushen, xixin, mahuang, danggui | High |
| Jia et al., 2012 [27] | RCT | HD | Dahuang, chuanxiong, baizhi, baixianpi, difuzi, zaojiaoci, kushen, xixin, danggui, chantui, jixueteng | High |
| Jia, Li and Fei, 2012 [28] | RCT | HD | Dahuang, chuanxiong, baizhi, baixianpi, difuzi, zaojiaoci, kushen, xixin, danggui, chantui, jixueteng | High |
| Lan, 2017 [29] | RCT | HD | Dahuang, chuanxiong, danshen, baixianpi, difuzi, honghua, kushen, xixin, mahuang, danggui | High |
| Lin, 2014 [30] | RCT | HD | Dahuang, chuanxiong, baizhi, baixianpi, difuzi, zaojiaoci, kushen, xixin, danggui, chantui, jixueteng | High |
| Shen, 2014 [31] | RCT | HD | Tufulin, danshen, baixianpi, quanxie, difuzi, heshouwu, kushen, xixin, shechuangzi, mahuang, danggui, wugong, chantui, biejia | High |
| Wang et al., 2013 [32] | RCT | HD | Dahuang, chuanxiong, baixianpi, difuzi, chishao, kushen, xixin, shechuangzi, juhua, danggui, chantui | High |
| Wen, 2007 [33] | RCT | HD | Tufulin, chuanxiong, baijili, difuzi, wushaoshe, jingjie, xixin, danggui, jixueteng | High |
| Yao, 2015 [34] | RCT | HD | Tufulin, baixianpi, difuzi, kushen, jingjie, chantui | High |
| Yu et al., 2017 [35] | RCT | HD | Tufulin, chuanxiong, baixianpi, difuzi, kushen, jingjie, zisuye, danggui, jixuecao, chantui | High |
| Zhang et al., 2014 [36] | RCT | HD | Tufulin, difuzi, baixianpi, kushen, chantui, jingjie | High |
| Zhang et al., 2012 [37] | RCT | HD | Baizhi, baijili, fangfeng, songjie, qianghuo, guizhi, jingjie, xixin, shechuangzi, mahuang, cangzhu, tanxiang, chantui | High |
| Zhao, 2011 [38] | RCT | HD | Wujiapi, baizhi, baijili, shenjincao, fangfeng, peilan, songjie, qianghuo, weilingxian, guizhi, taozhi, haitongpi, jingjie, xixin, shechuangzi, mahuang, zisuye, huaizhi, cangzhu, tanxiang, chantui, huoxiang | Some |
| Zheng, 2016 [39] | RCT | HD | Chuanxiong, shengdihuang, difuzi, chishao, fangfeng, kushen, mahuang, danggui, chantui | High |
|
|