The effect of chinese herbal medicine Banxia Baizhu Tianma Decoction for the treatment of vertebrobasilar insufficiency vertigo: A systematic review and meta-analysis of randomized controlled trials ☆

•Banxia Baizhu Tianma Decoction may improve the clinical efficacy and significantly speed up the blood flow velocity of the vertebrobasilar artery in vertebrobasilar insufficiency vertigo.•This meta-analysis was the most comprehensive and recent and applied the summary of findings using the grades of evidence from GRADE System.•Herbal formulae are based on the individual’s TCM pattern diagnosis.