Objectives : This study was carried out to investigate the acute toxicity and safety of $Leejung$-$tang$($Lizhong$-$tang$) and fermented $Leejung$-$tang$($Lizhong$-$tang$) extract. Methods : To evaluate their acute toxicity and safety, 0(control group), 1250, 2500 and 5000 mg/kg of $Leejung$-$tang$($Lizhong$-$tang$) and fermented $Leejung$-$tang$($Lizhong$-$tang$) extracts were orally administered to 35 male and 35 female ICR mice. After a single administration, we observed survival rates, general toxicity, changes of body weight, and autopsy. Results : Compared with the control group, we could not find any toxic alteration in any of treated groups (1250, 2500 and 5000 mg/kg). Conclusions : $LD_{50}$ of $Leejung$-$tang$($Lizhong$-$tang$) and fermented $Leejung$-$tang$($Lizhong$-$tang$) were over 5000 mg/kg and it is very safe to ICR mice.