叙曰∶血营气卫，胥有义焉。阴在内，阳之守也，故曰营。阳在外，阴之卫也，故曰卫
。二者宜调而不宜病，血一不调，则营守乎中者，反出于外而败之，微者迫于热，盛者真阳
不足以运血，而卫亦败也。今考名方二十八首，酌而用之，则调元之手矣。
当归（酒洗） 熟地黄（各三钱） 川芎（酒洗，一钱五分） 白芍药（酒炒，二钱）
血不足者，此方调之。
气、血，人身之二仪也。天地之道，阳常有余，阴常不足。人与天地相似，故阴血难成
而易亏。是方也，当归、芍药、地黄，味浓者也，味浓为阴中之阴，故能生血。川芎味薄而
气清，为阴中之阳，故能行血中之气。然草木无情，何以便能生血？所以谓其生血者，以当
归、芍药，地黄能养五脏之阴，川芎能调营中之气，五脏和而血自生耳。若曰四物便能生血，
则未也。师云∶血不足者，以此方调之则可。若上下失血太多，气息几微之际，则四物禁勿
与之。所以然者，四物皆阴，阴者天地闭塞之令，非所以生万物者也，故曰禁勿与之。
当归（二钱） 黄 （一两）
男、妇肌热，目赤面红，烦渴引饮，脉来洪大而虚，重按全无者，此方主之。
血实则身凉，血虚则身热。或以肌困劳役虚其阴血，则阳独治，故令肌热、目赤、面红
、烦渴引饮。此证纯象伤寒家白虎汤之证，但脉大而虚，非大而长，为可辨尔。《内经》所
谓脉虚血虚是也。当归味浓，为阴中之阴，故能养血，而黄 则味甘补气者也。今黄 多于
当归数倍，而曰补血汤者，有形之血不能自生，生于无形之气故也。《内经》曰∶阳生阴长，
是
序言说：血属于营，气属于卫，其中都蕴含着深刻的道理。阴气居于体内，是阳气的守持者，所以称为“营”。阳气居于体外，是阴气的护卫者，所以称为“卫”。这两者适宜调和而不适宜生病。如果血一旦不调，那么原本在内部守持的营气，反而向外溢出而败坏；轻微的病症是由于热邪逼迫所致，严重的病症则是由于真阳不足不足以推动血液运行，导致卫气也败坏。现在考证并列出二十八首著名方剂，斟酌后使用它们，就是调理元气的手段了。
当归（用酒清洗）三钱，熟地黄三钱，川芎（用酒清洗）一钱五分，白芍药（用酒炒制）二钱。
对于血虚的患者，用这个方剂来调理。
气和血，是人体中的阴阳两极。天地的规律是，阳气常常有余，阴气常常不足。人与天地相似，所以阴血的生成困难且容易亏损。这个方子中，当归、芍药、地黄，味道浓厚，属于阴中之阴，所以能够生血。川芎味道淡薄而气味清轻，属于阴中之阳，所以能够行走在血中的气。然而草木无情，怎么就能生血呢？之所以说它能生血，是因为当归、芍药、地黄能滋养五脏的阴气，川芎能调畅营分中的气，五脏调和了，血自然就会生成。如果说四物汤本身就能直接生血，那是不对的。老师说：血不足的人，用这个方剂来调理是可以的。如果上下失血过多，气息微弱将绝的时候，就禁止给予此方。之所以这样，是因为四物汤全是阴药，阴药对应的是天地闭塞的时令，不是用来生长万物的，所以说禁止给予。
当归二钱，黄芪一两。
男性或女性出现肌肤发热，眼睛红赤，面色发红，烦躁口渴想喝水，脉搏洪大但按之空虚，重按时完全无力的，用这个方剂主治。
血实则身体凉爽，血虚则身体发热。有的人因为肌肉困倦、劳役过度损伤了阴血，导致阳气独盛，所以出现肌肤发热、眼睛红赤、面色发红、烦躁口渴想喝水的症状。这个证候的表现纯粹像伤寒家的白虎汤证，只是脉象大而虚，而不是大而长，这是可以辨别的地方。这就是《内经》所说的脉虚即血虚的情况。当归味道浓厚，属于阴中之阴，所以能养血，而黄芪则是味甘补气之药。现在黄芪的数量比当归多几倍，却叫做补血汤，原因是：有形的血液不能自己生成，它是生于无形的气的缘故。《内经》说：阳生阴长，这是……
Preface: Blood belongs to Ying (Nutritive Qi), and Qi belongs to Wei (Defensive Qi); both contain profound principles. Yin resides within, serving as the guardian of Yang, hence it is called "Ying." Yang resides outside, serving as the shield of Yin, hence it is called "Wei." These two should be harmonized rather than diseased. If blood becomes disordered, the Ying that should guard from within will instead escape outward and deteriorate; in mild cases, this is forced by heat, while in severe cases, it is due to insufficient True Yang failing to move the blood, causing the Wei also to deteriorate. Now, examining twenty-eight famous formulas and applying them judiciously constitutes the method for regulating Yuan Qi (Primal Qi).
Danggui Radix Angelicae Sinensis (Jiu Xi, washed with wine) 3 qian, Shudihuang Radix Rehmanniae Preparata 3 qian, Chuanxiong Rhizoma Chuanxiong (Jiu Xi, washed with wine) 1.5 qian, Baishao Radix Paeoniae Alba (Jiu Chao, stir-fried with wine) 2 qian.
For those with blood deficiency, this formula is used to regulate.
Qi and Blood are the two polarities (Yin-Yang) of the human body. The way of Heaven and Earth is that Yang is often in excess, while Yin is often deficient. Humans resemble Heaven and Earth; therefore, Yin-Blood is difficult to form and easy to deplete. In this formula, Danggui, Shaoyao, and Dihuang have rich flavors, belonging to "Yin within Yin," thus they can generate blood. Chuanxiong has a thin flavor and clear aroma, belonging to "Yang within Yin," thus it can move the Qi within the blood. However, plants and trees are without emotion; how can they generate blood? The reason it is said to generate blood is that Danggui, Shaoyao, and Dihuang can nourish the Yin of the Five Viscera, and Chuanxiong can regulate the Qi within the Ying. When the Five Viscera are harmonious, blood generates spontaneously. To say that Siwu Tang itself directly generates blood is incorrect. The Master said: For those with blood deficiency, using this formula to regulate is acceptable. However, if there is excessive bleeding from above or below, and breath is faint and near extinction, this formula is strictly contraindicated. The reason is that all components of Siwu Tang are Yin herbs; Yin corresponds to the season of closure in Heaven and Earth, which is not suitable for generating all things; hence, it is stated as strictly contraindicated.
Danggui Radix Angelicae Sinensis 2 qian, Huangqi Radix Astragali Membranacei 1 liang.
For men or women presenting with fever of the skin and muscles, red eyes, flushed face, irritability, thirst with desire to drink, and a pulse that is洪大 (Hongda/Vigorous and Large) yet empty upon pressure, becoming completely absent upon heavy pressing, this formula is indicated.
When Blood is Excess, the body is cool; when Blood is Deficient, the body is hot. Some individuals suffer from Yin-Blood deficiency due to muscle fatigue and overwork, causing Yang to dominate exclusively, resulting in fever of the skin and muscles, red eyes, flushed face, irritability, and thirst with desire to drink. This syndrome presents purely like the Baihu Tang (White Tiger Decoction) syndrome in Shanghan (Cold Damage) diseases, but the pulse is large and empty rather than large and long, which is the distinguishing feature. This corresponds to what the Neijing (Classic of Internal Medicine) states: empty pulse indicates blood deficiency. Danggui has a rich flavor, belonging to "Yin within Yin," thus it can nourish blood, whereas Huangqi is sweet in taste and tonifies Qi. Currently, the amount of Huangqi is several times that of Danggui, yet it is called Buxue Tang (Blood-Nourishing Decoction) because substantial Blood cannot generate itself; it is generated from formless Qi. The Neijing states: "Yang generates, Yin grows," this is...