Subacute toxicity study was performed in Sprague-Dawley rats after daily oral administration of KDRD-002 0.23, 0.7, 2.1 g/kg for one month. There were no clinical signs and pathological changes compared with control group but slight decrease in spontaneous motor activities and locomotions at high dose group of KDRD-002. Body weights were not significantly changed between control and KDRD-002 treated groups. In histopathological examinations, however, two animals (1 male, 1 female) showed abnormal increases in the weights of spleen tissues at middle dose group of KDRD-002. Also, there were some hemorrhages in lung tissues at low dose group of KDRD-002, but it was not considered to be caused by KDRD-002. These results suggest that KDRD-002 does not induce any significant subacute oral toxicity in Sprague-Dawley rats.