Veratrum is a traditional Chinese medicine, which mainly has the effects of relieving cough, resolving phlegm and killing insect venom, and should be used under the guidance of traditional Chinese medicine practitioners. With the efficacy of relieving cough, resolving phlegm and killing insect venom, veratrum is mainly used in clinical practice for the treatment of cough and asthma, and for controlling the discomfort of patients with bronchitis. Because the drug also has the effect of insect repellent, it is suitable for relieving the discomfort symptoms caused by mosquito bites. However, it is forbidden for weak body and pregnant women, and should not be combined with Chinese medicines such as Xin Xin, Paeoniae Alba and Zhu Ginseng. The roots and rhizomes of this product are cylindrical, about 2~4cm long, 0.7~1.4cm in diameter, covered with residual black-brown fibrous leaf-based vascular bundles, and the lower part of which is clustered with a majority of fine heels, slightly curved, and the roots are slender. It is recommended that patients use quassia reasonably under the guidance of traditional Chinese medicine, do not use without authorization, to avoid causing adverse reactions.