Safety evaluation showed it safe and non-toxic.It is composed of Zhenzhu(Pearl powder), Wu Beizi(Chinese Gall), Cangzhu(Atractylodes Rhizome), Gancao(Licorice Root), et al.

• 观察还表明该药较显著地延长口腔溃疡的发作期，安全性评价表明该药安全、无毒。