Yizhi capsule for vascular dementia - PubMed (original) (raw)
Review
Yizhi capsule for vascular dementia
T X Wu et al. Cochrane Database Syst Rev. 2007.
Abstract
Background: Vascular dementia (VD) is a syndrome or diagnosis that has different causes and clinical manifestations relating to several different vascular mechanisms and changes in the brain. Some traditional Chinese herbal medicines were developed for treating VD. DH: Yizhi capsule is one such herbal concoction which is reported to improve clinical symptoms significantly. The efficacy and adverse effects of Yizhi capsule need to be reviewed systematically and assessed critically to inform clinical practice and guide the continued search for new treatment regimens.
Objectives: To assess the effectiveness and possible adverse events of 'Yizhi capsule' in treating vascular dementia.
Search strategy: The Cochrane Dementia and Cognitive Improvement Group's Specialised Register was searched on 18 September 2006 using the terms yi-zhi, "yi zhi" and yizhi. This database contains trial references from major health care databases and ongoing trial database and is up to date. In addition the review authors searched a variety of Chinese databases.
Selection criteria: Randomised, placebo controlled trials in which patients with vascular dementia were treated with 'Yizhi capsule' were included.
Data collection and analysis: Two authors independently assessed trial quality and extracted data. We telephoned study authors for missing information as to whether treatment allocation was randomised and other methodological details.
Main results: No studies were found that met the inclusion criteria. We identified nine references to trials which included the term 'Yizhi capsule' in the description of the interventions. Two study authors were contacted by telephone and we discovered that the allocation methods they had used were not actually randomised. Four references were describing the same study. Three studies were excluded because 'positive drugs' were used as a control.
Authors' conclusions: There is no evidence from randomised controlled trials to support or proscribe against the use of 'Yizhi capsule' as a treatment for vascular dementia.
Conflict of interest statement
None known.
Update of
- doi: 10.1002/14651858.CD005382
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References
References to studies excluded from this review
Chen 1997 {published data only}
- Chen K, Chen KJ, Zhou WQ, Chui N, Tu RS, Gao P, et al. Yizhi Capsule in the treatment of senile vascular dementia, a randomized trial [Clinical Study of Effect of Yizhi Capsule on Senile Vascular dementia]. Chinese Journal of Integrated traditional Chinese and Western Medicine 1997;17(7):393‐7. - PubMed
Qiao 2004 {published data only}
- Qiao QZ, Zhang ZQ, Liu HR, Chang ZY. Effect of fushen yizhi capsule on the blood lipid and hemorheology in elderly patients with vascular dementia. Chinese Journal of Clinical Rehabilitation 2004;8(31):6962‐3.
Wang 2000 {published data only}
- Wang XF, Wang KP, Wang FJ. Yizhi Zaizao capsule in the treatment of vascular dementia with 50 cases. Modern Journal of Integrated Traditional Chinese and Western Medicine 2000;9(14):1373‐4.
Wang 2002 {published data only}
- Wang FJ, Lu SJ, Dong Z. Yizhi TOngluo capsule in the treatment of vascular dementia. Modern Journal of Integrated Tradtional Chinese and Western Medicine 2002;11(4):295‐7.
Yan 2001 {published data only}
- Yan XP, Wang H, Zhang TZ. Clinical observation on effect of Tongmai Yizhi capsule in treating vascular dementia. Chinese Journal of Integrated Tradetional Chinese and Western Medicine 2001;21(8):573‐5. - PubMed
Zhang 2004 {published data only}
- Ji LJ, Zhang MZ. Qiangpi Bujin Huayu. Yizhi capsule in the treatment of multi‐infarct dementia. Journal of Fujian College of TCM 2004;14(1):1‐3.
- Ji LJ, Zhang MZ. Qiangpi Bujin Huayu. Yizhi capsule in the treatment of multi‐infarct dementia. Journal of Fujian College of TCM 2004;14(4):1‐3.
- Ji LJ, Zhang MZ. Qiangpi Bujin Huayu. Yizhi capsule in the treatment of multi‐infarct dementia. Journal of Fujian College of TCM 2004;14(5):1‐3.
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