浣裤汁，解箭毒，并治伤寒，女痨、阴阳易俱效。男用女，女用男，剪切对阴处才灵。
童男
女者，力强易效。月经布烧灰，解药箭毒神验。此等物不可存于药笼，必致诸药不效。然不
可不知以救世病也。
阴阳易之病甚多，有男易男、女易女者，又不可不知。男则交男而易男，女同净桶而交
于女
。又不可男用女，女用男之浣裤汁也。须男用男、女用女，治之可耳。要无不神效者也。
妇人月水，治女劳复最神。经衣灰可止血，方士取首经，入之茯苓之中，为延龄神药，
且能
治痨损。此物至神之药，亦至秽之物也。上士用之以得仙，非至神乎。凡世人修合丸散，兴
至吉祥事，及小儿出痘生疮，皆避忌。如犯之，吉变凶，药不灵，疮痘变坏，非至秽乎？然
而至秽之物，出于至神之内也。盖经水者，天癸之水也。女子二七而天癸至，任脉通，太冲
脉盛，而经水时下。时下者，及其时而至也。故此水为
天一所生，乃先天之气所成，后天之气所化，无形而变为有形也，所以上应月，下应潮，一
月一行，与海与太阴相合也。阴中至阳，能补阴生阳。方士美其名曰红铅，其实即首经也。
是至神之物，何以又成为至秽乎？盖月水未出于儿门，则月水含至阳之气。月水一出于儿门
，则月水成至阴之形，纯阳而变为纯阴，全是杀气而非生气矣。生气可亲，而杀气难犯，又
何疑乎。此所以成为秽物耳，非因其出于儿门而谓秽也。
或问月水既是秽物，方士取入茯苓之中以接命，不知首经与寻常月水，又何以不同？曰∶
首
经虽出儿门，而阳犹未化，不比寻常月水，尽化为阴，故可用之以接阳。且痨瘵微躯，往往
多祟凭其身，正欲借秽以逐祟，以祟最恶秽也，所以用之相宜耳。
或问经水可治女劳之复，其义何居？曰∶此前人之所未发也。女劳之复，热毒而入于无
病之
人，原不必用风散解热之品，以伤人之元气。故用经水之布，浣其汁而饮之，引其热而下行
，则其毒易出。盖经水原是下行之物，不肯留住于腹中，引热下行，所以最速，非取其补阴
中之精也。
或问经水既是行物，何以又能止血耶？曰∶凡血得厌秽之物，皆能止血。经水，正秽物
也，
故用之而效。金疮箭簇，古人皆用之，亦此意耳。
浣裤汁，能解箭毒，并且治疗伤寒、女劳复（女性因房事过早复发）、阴阳易（男女病后交接传染）都有效。男性患者用女性的，女性患者用男性的，剪碎后敷在阴部才灵验。
童男童女者，药力强且容易见效。月经布烧成灰，解药箭毒非常灵验。这类物品不可存放在药柜中，否则会导致其他药物失效。然而不能不知道这些知识来救治世间的疾病。
阴阳易的病证很多，有男传男、女传女的，又不可不知。男性是交合男性而致病，女性是与净桶接触而传给女性。这时就不能再用男用女、女用男的浣裤汁了。必须男用男、女用女，这样治疗才可以。没有不神效的。
妇女的月经，治疗女劳复最灵验。经血染过的衣服烧成灰可以止血，方士采集初潮经血，混入茯苓中，作为延年益寿的神药，而且能治疗虚损劳伤。这是极其灵验的药物，也是极其污秽的物品。高明的医者用它得道成仙，难道不是极灵验吗？凡是世人配制丸散，举行吉祥之事，以及小儿出痘生疮，都要避忌。如果触犯禁忌，吉变凶，药不灵验，疮痘恶化，难道不是极其污秽吗？然而这极其污秽之物，却出自极其灵验之源。因为经水是天癸之水。女子十四岁时天癸至，任脉通畅，太冲脉旺盛，于是经水按时下行。所谓“时下”，是指按时而至。所以此水由天一之气所生，乃先天之气所成，后天之气所化，无形变为有形，因此上应月亮，下应潮汐，每月一行，与大海和太阴相合。阴中含至阳之气，能补阴而生阳。方士美其名曰红铅，其实也就是初潮经血。这是极其灵验之物，为什么又成为极其污秽的呢？大概月水未从阴道排出时，含有至阳之气；月水一旦从阴道排出，就变成至阴之形，纯阳变为纯阴，全是肃杀之气而非生机之气了。生气可亲，而杀气难犯，又有什么可疑呢？这就是它成为秽物的原因，并非因为它从阴道出来才叫秽物。
有人问：月水既然是秽物，方士取入茯苓中以接续生命，不知初潮经血与寻常月经，又为何不同？回答说：初潮经血虽然从阴道排出，但阳气尚未完全转化，不像寻常月经完全化为阴，所以可以用它来接引阳气。况且痨瘵病人身体微弱，往往多有邪祟依附其身，正想借秽物以驱逐邪祟，因为邪祟最厌恶秽物，所以使用它很适宜。
有人问：经血可以治疗女劳复，其中的道理何在？回答说：这是前人未曾阐发的。女劳复，热毒侵入无病之人，原本不必用发散风邪、解除热邪的药物，以免损伤人的元气。所以用经血染过的布，洗取其汁液饮用，引导热毒下行，那么毒邪就容易排出。因为经血本是下行之物，不肯滞留于腹中，引导热下行，所以最快，并非取它补充阴中之精。
有人问：经血既然是流动之物，为什么又能止血呢？回答说：凡是血液遇到厌秽之物，都能止血。经血正是秽物，所以使用它有效。金创箭伤，古人都使用它，也是这个意思罢了。
Huan Ku Zhi (Menstrual Panties Juice), can resolve arrow poison, and is effective in treating Shang Han (Cold Damage Syndrome), Nu Lao Fu (Female Relapse due to Sexual Exhaustion), and Yin Yang Yi (Transmission of Disease between Sexes). For male patients, use female's; for female patients, use male's. It is only efficacious when cut and applied to the genital area.
Those from virgin males and females possess strong medicinal power and are easy to effect. Ash made from menstrual cloth is miraculous in resolving arrow poison. Such substances must not be stored in the medicine cabinet, as they will render other medicines ineffective. However, one must know of them to save people from diseases.
There are many types of Yin Yang Yi disease, including transmission from man to man or woman to woman, which must also be known. For men, it is contracted through intercourse with a man; for women, through contact with a clean bucket with a woman. In these cases, one must not use Huan Ku Zhi where man uses woman or woman uses man. One must use man for man and woman for woman; only then can it be treated. There is none that is not miraculously effective.
Women's menstruation is most miraculous in treating Nu Lao Fu. Ash from menstrual garments can stop bleeding. Alchemists collect the first menstruation, mix it with Poria Cocos (Fuling, 茯苓), making it a divine medicine for longevity, and it can also treat consumptive disorders. This is an extremely efficacious medicine, yet also an extremely filthy substance. A superior practitioner uses it to attain immortality, is it not extremely efficacious? Whenever common people compound pills and powders, engage in auspicious events, or when children suffer from smallpox and sores, they must avoid taboos. If violated, auspicious turns to ominous, medicines lose efficacy, and sores/smallpox worsen, is it not extremely filthy? Yet this extremely filthy substance comes from an extremely divine source. Menstrual water is the water of Tian Gui (Heavenly Puberty). At age fourteen (two sevens), Tian Gui arrives, the Ren Mai (Conception Vessel) becomes unblocked, and the Tai Chong Mai (Great Surge Vessel) becomes vigorous, causing menstrual water to flow downward on time. "Flowing downward on time" means arriving at its proper time. Thus, this water is generated by Tian Yi (One of Heaven), formed by Pre-Heaven Qi (Primordial Energy), transformed by Post-Heaven Qi (Acquired Energy), changing from formless to form. Therefore, it corresponds to the moon above and tides below, flowing once a month, harmonizing with the sea and Tai Yin (Lunar Energy). Within Yin lies Supreme Yang, capable of tonifying Yin and generating Yang. Alchemists beautify its name as Hong Qian (Red Lead), which is actually the first menstruation. This is an extremely divine object, why does it become extremely filthy? Generally, before menstrual water exits the vagina, it contains Supreme Yang Qi. Once menstrual water exits the vagina, it becomes the form of Supreme Yin, transforming Pure Yang into Pure Yin, consisting entirely of Killing Qi rather than Generating Qi. Generating Qi is approachable, while Killing Qi is difficult to offend, what doubt is there? This is why it becomes a filthy substance, not because it exits the vagina that it is called filthy.
One asks: Since menstrual water is a filthy substance, how do alchemists take it into Poria Cocos to extend life? How is the first menstruation different from ordinary menstrual water? I reply: Although the first menstruation exits the vagina, Yang has not yet fully transformed, unlike ordinary menstrual water which is entirely transformed into Yin, thus it can be used to connect Yang. Moreover, patients with tuberculosis/consumption have weak bodies, often possessed by evil spirits. They wish to borrow filth to drive away spirits, as spirits detest filth most, so using it is appropriate.
One asks: Menstrual blood can treat Nu Lao Fu, what is the principle? I reply: This is something predecessors had not expounded. Nu Lao Fu involves heat-toxin entering a healthy person. Originally, there is no need to use wind-dispersing and heat-resolving agents to damage the body's Yuan Qi (Original Energy). Therefore, using cloth stained with menstrual blood, washing its juice and drinking it, guides the heat downward, so the toxin is easily expelled. Since menstrual blood is naturally a downward-flowing substance and refuses to stay in the abdomen, guiding heat downward is the fastest method. It does not rely on supplementing the essence within Yin.
One asks: Since menstrual blood is a flowing substance, how can it stop bleeding? I reply: Any blood encountering repulsive/filthy substances can stop bleeding. Menstrual blood is precisely such a filthy substance, hence its efficacy. For sword wounds and arrow injuries, ancients all used it, based on this same principle.