Chinese herbal medicine for the treatment of obesity-related hypertension.

Objectives. To assess the clinical evidence of Chinese herbal medicine (CHM) for obesity-related hypertension. Search Strategy. Electronic databases were searched until January, 2013. Inclusion Criteria. We included randomized clinical trials (RCTs) testing CHM against nondrug therapy and conventional western medicine, or combined with conventional western medicine against conventional western medicine. Data Extraction and Analyses. Study selection, data extraction, quality assessment, and data analyses were conducted according to Cochrane standards. Results. 11 trials were included. Methodological quality was evaluated as low. 1 trial investigated the efficacy of CHM plus nondrug therapy versus nondrug therapy. Positive results in diastolic blood pressure (DBP) (WMD: -5.40 [-5.88, -4.92]; P < 0.00001) were found in combination group. 1 trial investigated the efficacy of CHM versus conventional western medicine. Positive results in systolic blood pressure (SBP) (WMD: -1.39 [-2.11, -0.67]; P = 0.0002) were found in CHM. 9 trials investigated the efficacy of CHM plus conventional western medicine versus conventional western medicine. Positive results in SBP (WMD: -6.71 [-11.08, -1.25]; P = 0.02) were found in combination group. The safety of CHM is unknown. Conclusions. No definite conclusion could be got due to poor methodological quality. Rigorously designed trials are warranted to confirm these results.