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Evidence-Based Complementary and Alternative Medicine
Volume 2014 (2014), Article ID 570134, 15 pages
Research Article

Preclinical Safety of the Root Extract of Polygala tenuifolia Willdenow in Sprague-Dawley Rats and Beagle Dogs

1Research & Development Center, Braintropia Co. Ltd., Anyang-si, Gyeonggi-do 431-716, Republic of Korea
2Department of Microbiology, College of Natural Science, Dankook University, Cheonan-si, Chungnam 330-714, Republic of Korea

Received 30 July 2014; Revised 13 October 2014; Accepted 13 October 2014; Published 5 November 2014

Academic Editor: Khalid Rahman

Copyright © 2014 Ki Young Shin 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.


The root of Polygala tenuifolia Willdenow has been used for the treatment of insomnia, depression, and amnesia. However, the toxicological properties of the herb have been overlooked, because it has been used for a long time for various purposes. In this study, we evaluated the preclinical safety of the root extract in rats and beagle dogs. First, the acute oral toxicity was tested in both rats and dogs. In the rats, only one female of 2 g/kg died, but no treatment-related death or clinical and gross findings were observed after the administration. No toxicological changes or mortalities related to the test substance were also observed after the administration in the dogs. Although vomiting, discoloration, or hemorrhage was found in some dogs, there were no serious abnormalities. Second, the subchronic toxicity was investigated in the rats. Two animals were found dead in the female group of 1,000 mg/kg/day, but there were no abnormal findings associated with the test substance. There also were no adverse effects on the clinical signs, body weight, and hematological and biochemical findings. Therefore, our results showed that the acute or subchronic toxicity of the root extract of Polygala tenuifolia might not be toxic to rats and dogs.