Main Outcome Measures:During the observation period, the investigators and study nurses actively enquired subjects if there was any adverse event (AEs) occurring to them by using Traditional Chinese medicine Adverse Events (TCM AE) questionnaire which includes 20 AEs proposed by experienced CM doctors as most commonly seen in the use of study drug. Every subject's complaint or abnormal laboratory value were carefully examined for possible causality and reviewed and decided by the research team. The primary outcome measure was the mean changes from baseline to week 12 in terms of frequency of hot flush and the severity of menopausal symptoms measured by the Kupperman Menopause Index. The secondary outcome measures included changes in quality of life measured by World Health Organization Quality of Life (WHOQOL) questionnaire, and adverse events monitored actively by a global assessment of tolerability. During the study period, every subject also received tests on routine hematology, biochemical function, and gynecologically relevant hormones at baseline visit, 4 weeks and 12 weeks after medication.