Overview of Cochrane reviews on Chinese herbal medicine for stroke.

Background: Stroke is a major health issue worldwide. Since Chinese herbal medicine is widely used for the treatment of stroke, there is a need to evaluate its efficacy as an alternative treatment option. The aim of this paper is to carry out an overview of Chinese herbal medicine for the treatment of stroke by summarizing and evaluating all existing Cochrane reviews.

Methods: The Cochrane Database of Systematic Reviews was searched from its inception date to August 2019 using "stroke" and "herbal medicine" or "traditional medicine" as search terms. For the methodological quality assessment of the Cochrane reviews, the Assessment of Multiple Systematic Reviews (AMSTAR) tool was used.

Results: Eight Cochrane reviews that evaluated the efficacy of herbal medicine for the treatment of stroke were included in this overview. There were 71 randomized controlled trials, with 5770 patients in total. The AMSTAR scores of the Cochrane reviews included in this study ranged from 9 to 11 with a mean score of 10. Three reviews met all the 11-item criteria of the AMSTAR. All reviews presented potential efficacy of herbal medicine for stroke treatment in terms of improvement of neurological deficit.

Conclusion: This overview reveals the potential efficacy of herbal medicines for the treatment of stroke in terms of neurological deficit improvement. However, due to the high risk of bias in the reviews' studies, an affirmative conclusion for the recommendation of herbal medicine for clinical practice could not be drawn.