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Evidence-Based Complementary and Alternative Medicine
Volume 2013 (2013), Article ID 706125, 18 pages
http://dx.doi.org/10.1155/2013/706125
Review Article

Tianma Gouteng Yin as Adjunctive Treatment for Essential Hypertension: A Systematic Review of Randomized Controlled Trials

1Department of Cardiology, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
2School of Life Sciences, Tsinghua University, Beijing 100084, China
3Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada L8S 4L8

Received 11 December 2012; Revised 28 March 2013; Accepted 31 March 2013

Academic Editor: Aiping Lu

Copyright © 2013 Jie Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Tianma Gouteng Yin (TGY) is widely used for essential hypertension (EH) as adjunctive treatment. Many randomized clinical trials (RCTs) of TGY for EH have been published. However, it has not been evaluated to justify their clinical use and recommendation based on TCM zheng classification. Objectives. To assess the current clinical evidence of TGY as adjunctive treatment for EH with liver yang hyperactivity syndrome (LYHS) and liver-kidney yin deficiency syndrome (LKYDS). Search Strategy. 7 electronic databases were searched until November 20, 2012. Inclusion Criteria. RCTs testing TGY combined with antihypertensive drugs versus antihypertensive drugs were included. Data Extraction and Analyses. Study selection, data extraction, quality assessment, and data analyses were conducted according to the Cochrane standards. Results. 22 RCTs were included. Methodological quality was generally low. Except diuretics treatment group, blood pressure was improved in the other 5 subgroups; zheng was improved in angiotensin converting enzyme inhibitors (ACEIs), calcium channel blockers (CCBs), and “CCB + ACEI” treatment groups. The safety of TGY is still uncertain. Conclusions. No confirmed conclusion about the effectiveness and safety of TGY as adjunctive treatment for EH with LYHS and LKYDS could be made. More rigorous trials are needed to confirm the results.