泻肺降气、下痰。
辛甘微寒。长于降气、下痰止嗽。治肺气壅实。（喉中作水鸡声者、服之立愈。）胸膈逆
满。
肺实者宜。否则忌也。似牛膝。粗长坚直。脆而易断者。白前也。短小柔软。能弯不断者。
白薇也。（近道多有、形色颇同、以此别之。）去头须。甘草水浸一伏时。焙用。忌羊肉。
泻血热。
苦咸而寒。阳明冲任之药。利阴气。下水气。主中风身热支满。忽忽不知人。（阴虚火
旺、
则内热生风、火气焚灼、故身热支满、痰随火涌、故不知人。）血厥。（汗出过多、血少阳气
独上、气塞不行而厥、妇人尤多、此证宜白薇汤、白薇当归各一两、参五钱、甘草钱半、每
服五钱。）热淋温疟。寒热酸痛。（寒热作、则营气不能内荣、故酸痛。）妇人伤中淋露。（血
热、孙真人千金方、白薇散、治胎前产后遗尿不知时、白薇白芍等分、酒调服、丹溪曰∶此
即刘河间原病式所谓、热甚廷孔郁结、神无所依、不能收禁之意也、廷孔、女人溺孔也。）
产虚烦呕。（经疏云∶古方调经种子、往往用之、盖不孕缘于血热、而其源起于真阴不足、
阳胜而内热、故营血日枯也、益阴清热、则血自生旺而有子矣、须佐以归地芍药杜仲苁蓉等
药。）血热相宜。血虚则忌。似牛膝而短小柔软。去须。酒洗。恶大黄、大戟、山茱、姜枣。
（
冬各一两、百部二两、米饮服末一钱。）
（白前）具有泻肺降气、下痰的功效。
其性味辛、甘，微寒。长于降气、下痰、止咳。治疗肺气壅实。（若出现喉中发出像水鸡叫声的症状，服用此药可立即痊愈。）以及胸膈部气逆胀满。
适用于肺气实证者。如果不是肺气实证，则应忌用。外形类似牛膝，但质地粗长、坚硬挺直，脆性大且容易折断的是白前。短小、柔软，能够弯曲而不断裂的是白薇。（近处产地多有这两种药，形色颇为相似，以此特征来区别它们。）使用时需去掉根头和须根，用甘草水浸泡一个昼夜（伏时），然后焙干使用。忌与羊肉同食。
（白薇）具有清泻血热的功效。
其性味苦、咸，寒。归阳明经及冲脉、任脉。能利阴气，下水气。主治中风引起的身体发热、肢体胀满、神情恍惚甚至不知人事。（阴虚火旺，则内生内热生风，火热之气焚灼，故而身体发热、肢体胀满；痰随火势上涌，故而不知人事。）以及血厥证。（因出汗过多，导致血少阳气独自上逆，气机闭塞不通而发生厥逆，妇女尤为多见，此证适宜使用白薇汤：白薇、当归各一两，人参五钱，甘草一钱半，每次服用五钱。）以及热淋、温疟、寒热交替伴酸痛。（当寒热发作时，营气不能内养机体，故而感到酸痛。）以及妇人伤中导致的淋露（指带下淋漓不尽或尿血等症）。（因血热所致，孙思邈《千金方》中的白薇散，治疗胎前产后遗尿不知时间，由白薇、白芍等分组成，酒调服。朱丹溪说：这就是刘完素《原病式》中所说的，热邪极盛导致廷孔郁结，神志无所依附，不能收摄禁固的意思。廷孔，指女性的尿道口。）以及产后虚烦呕吐。（《本草经疏》说：古方调理月经、助孕种子，往往使用此药。大概不孕源于血热，而其根源起于真阴不足，阳胜而生内热，故而营血日渐枯竭。滋补阴液、清泄内热，则血液自然生长旺盛而有子嗣了，必须佐以当归、地黄、芍药、杜仲、肉苁蓉等药物。）血热者适宜。血虚者则忌用。外形类似牛膝但短小柔软。需去掉须根，用酒清洗。畏恶大黄、大戟、山茱萸、生姜、大枣。（此处括号内容似为另一附方或注脚残留，原文未明确方名，仅列剂量与服法：冬虫夏草？此处疑为衍文或特定配伍，依原文直译：冬季各一两，百部二两，米饮送服粉末一钱。）
[Qian Hu] (Cynanchum Stauntonii Rhizoma)
Drains the Lung, descends Qi, and reduces phlegm.
Pungent, sweet, slightly cold. It excels at descending Qi, reducing phlegm, and stopping cough. It treats excess stagnation of Lung Qi (those with a rattling sound in the throat like a water frog will be cured immediately upon taking it). It addresses rebellious fullness in the chest and diaphragm.
It is suitable for cases of Lung excess; otherwise, it is contraindicated. It resembles Niuxi (Achyranthis Bidentatae Radix). The coarse, long, firm, and straight pieces that are brittle and easily broken are Qian Hu. The short, small, soft, and flexible pieces that can bend without breaking are Baiwei [Rhizoma Cynanchi Atrati]. (In nearby regions, there are many such herbs with similar appearance and color; distinguish them by this method.) Remove the head and rootlets. Soak in licorice water for one shichen (two hours), then dry-roast before use. Avoid mutton.
[Bai Wei] (Rhizoma Cynanchi Atrati)
Drains blood heat.
Bitter, salty, cold. It is a herb for the Yangming, Chong, and Ren meridians. It benefits Yin Qi and promotes the downward movement of water qi. It primarily treats wind-stroke with body heat and distending fullness. Sudden loss of consciousness (Yin deficiency with hyperactive fire generates internal heat and wind; the burning fire qi causes body heat and distending fullness, and phlegm surges with the fire, leading to unconsciousness). Blood jue (excessive sweating leads to blood deficiency, allowing Yang Qi to rise alone; Qi obstruction prevents circulation, resulting in jue; this is particularly common in women; for this syndrome, Baiwei Tang is indicated: Baiwei and Danggui each 1 liang, Renshen 5 qian, Gancao 1.5 qian; take 5 qian per dose). Hot strangury and warm malaria. Alternating chills and fever with soreness and pain (when chills and fever occur, Ying Qi cannot nourish internally, hence soreness and pain). Women’s injury from middle jiao with dripping discharge (blood heat; Sun Simiao’s Qianjin Fang, Baiwei San, treats enuresis during pregnancy or postpartum where timing is unknown: Baiwei and Baishao in equal parts, taken with wine mixed. Danxi stated: This is exactly what Liu Hejian meant in Yuanbing Shi as "severe heat causing depression and knotting in the Ting Kong, with the spirit having no reliance, unable to retain control." Ting Kong refers to the female urethral opening). Postpartum deficiency with vexation and vomiting (Jingshu states: Ancient formulas for regulating menstruation and promoting conception often use this. Infertility due to blood heat originates from insufficient True Yin, with Yang prevailing and internal heat generated, causing Ying Blood to wither daily. Nourishing Yin and clearing heat allows Blood to generate and flourish, enabling conception; it must be assisted with herbs such as Danggui, Dihuang, Baishao, Duzhong, and Rongrong). It is suitable for blood heat; contraindicated for blood deficiency. It resembles Niuxi but is shorter, smaller, softer, and more flexible. Remove rootlets. Wash with wine. It is incompatible with Dahuang, Daji, Shanzhuyu, Jiang, and Zao. (Dong 1 liang each, Baibu 2 liang; take 1 qian of powder with rice water.)