Abstract
Normal rabbits with 2.5-3.0kg body weight were intramuscularly injected 50mg/kg of K2 which was correspond to 100-300 fold of clinical dosage for human, and then, prothrombin time and thrombelastogram on blood of the rabbits were observed daily for 7 days. During this term, the prothrombin time and the thrombelastogram were little changed. Serum bilirubin of the rabbits showed normal level under this condition.
