首乌、白前、土鳖虫是三种常用中药。但是,我们发现部分地区,对这三种中药的供应使用,存在着将白首乌作首乌(何首乌),白薇作白前或白前作白薇,龙虱作土鳖虫的错误。白首乌与首乌,白薇与白前,龙虱与土鳖虫,它们之间不但品种来源不同,而且性味、功能 Shouwu, Baiqian and Tuyu are three commonly used traditional Chinese medicines. However, we have found that in some regions, the supply of these three kinds of Chinese medicines is due to the mistake of using white head radix as head sorghum (flower root), Bai wei as white or white before making baiwei, and raccoon as earthworm. Baishouwu and Shouwu, Baiwei and Baiqian, Dragonshoe and Earthworm are not only different types of sources, but also have different flavors and functions.