Expulsion of vomitus containing roundworm. Vomiting of roundworm is mentioned in the On Cold Damage (伤寒论 shāng hán lùn, biàn jué yīn bìng mài zhèng bìng zhì). The Zhang’s Clear View of Medicine (张氏医通 zhāng shì yī tōng) states, When there is roundworm in the stomach and intestines, if there is cold, or heat, or a cold-heat complex in the stomach and spleen, this can disquiet roundworm, which ascend counterflow to be vomited out. If there is cold, there is reversal cold of the extremities, and the vomited roundworm are pale-white in color; for this, use Center-Rectifying Decoction (理中汤lǐ zhōng tāng) plus mume (Mume Fructus, 乌梅wū méi), coptis (Coptidis Rhizoma, 黄连huáng lián), and dichroa leaf (Dichroae Folium, 蜀漆shǔ qī). If there is heat, the vomited roundworm are red and lively; for this, use Roundworm-Quieting Powder (安蛔散ān huí sǎn). For a cold-heat complex with periodic heart vexation, and vomiting after eating, use Mume Pill (乌梅丸wū méi wán).