Eucalyptus oil, which is distilled from myrtle such as Eucalyptus globulus Labil or Cinnamomum camphora(L.)Sieb or the other plants belonging to these kinds, is one kind of aetherolea and official medicinal substances of Chinese Pharmacopeia(2005).Eucalyptus oil mainly contains eucalyptol(C_(10)H_(18)O, more than 70%), limonene, a-pinene and ect. These composition have functions of antibiosis, antioxygen, improving air way [ 1, 2]. As for adverse reaction in gastrointestinal tract and nervous system, these ...