治太阳病发热恶寒，热多寒少，脉微弱者，此无阳也，不可发汗。
桂枝汤二分，越脾汤一分，合二升，温服一升。
桂枝麻黄汤各半，助正驱邪小发汗。太阳如疟脉虽微，热多无汗仍须散。（太阳如疟脉
微，为阴阳俱虚，汗、吐、下皆在所禁。然热多寒少，面有热色，身无汗，肤痒如虫行皮中，
以邪气怫郁在表，欲自出不得，虽脉微不可发汗，而热多无汗，又不得不汗，故立此法。助
正之力，侔于散邪，但取小汗即已，庶无大汗亡阳之虑。）风疟缘何属太阳，因其止作无间
断。（太阳如疟，一日二三度发，不似少阳之疟一日一发也。因风邪客于皮肤中，欲出不出，
故止作无定，后人因名之曰“风疟”。）又有桂二麻一汤，主治略同微有判。此因有汗桂枝
多，发散之功更和缓。（此与各半汤意略同。但此因大汗出之后，故桂枝略重而麻黄略轻。）
若夫桂枝（二）越脾（一）法，体虚邪亦轻微按。无阳是亡阳分津，脉弱热多义当玩。（此
无阳与亡阳不同。无阳者，即阳分亡津之谓。盖其人本非壮盛，而邪气亦轻，故身有寒热，
而脉微弱，若发其汗，必致有叉手冒心、脐下悸之变，故用桂枝汤四分之二以行阳，越脾汤
四分之一以行阴。行阴者，发越脾气而行胃中之津，俾阳和津生而脉复，令得似汗而解。盖
凡暴病发热，脉虽弱而治从外感；久病脉弱，热虽盛而治从内伤，此其要也。尤在泾《伤寒
贯
与麻黄合剂，则能尽麻黄之力，而并去其悍；与石膏同用，则能资石膏之益，而不挠乎权。
是虽麻、石并行，而实以桂枝为主，盖非滋养营卫，则无以为发汗散邪之地耳。凡正气不足
，邪气亦微，而仍须得汗而解者，宜于此三方取则焉。后人不能尽桂枝之用，而求之人参、
归、地之属，立意则同，而用药悬殊矣。”）
治疗太阳病（太阳经受邪所致的病证），出现发热、恶寒，热象重于寒象，脉象微弱者，这属于“无阳”（此处指阳气津液亏损，非纯阳虚）的情况，不可使用发汗法。
桂枝汤取两份，越婢汤取一份，合在一起煎煮至二升，每次温服一升。
桂枝麻黄各半汤，能扶助正气、驱除邪气，起到轻微发汗的作用。太阳病类似疟疾，虽然脉象微弱，但若热多无汗，仍然需要发散解表。（太阳病类似疟疾且脉微，是因为阴阳俱虚，汗法、吐法、下法都在禁忌之列。然而若热多寒少，面色发红，身体无汗，皮肤瘙痒如虫行皮中，这是因为邪气郁结在体表，想要排出却排不出来。虽然脉微不可发汗，但既然热多无汗，又不得不发汗，所以设立此法。扶助正气的力量与散邪的力量相当，只需取得微微出汗即可，从而避免大汗导致亡阳的忧虑。）风疟为何归属于太阳经？因为它的发作停止没有间断。（太阳病类似疟疾，一天发作两三次，不像少阳疟疾那样一天只发作一次。因为风邪客居在皮肤之中，想出来出不来，所以发作和停止没有定数，后人因此称之为“风疟”。）又有桂枝二越婢一汤，主治情况大致相同但有细微差别。这是因为患者有汗，所以桂枝用量较多，发散的功效更加和缓。（这与桂枝麻黄各半汤的意思大致相同。但此方是因为在大汗出之后使用的，所以桂枝略重而麻黄略轻。）至于桂枝二越婢一汤的方法，适用于体质虚弱且邪气也轻微的情况。“无阳”是指亡失津液于阳分，脉弱热多，其含义应当仔细玩味。（这里的“无阳”与“亡阳”不同。“无阳”指的是阳分亡失津液。大概是因为此人本来就不是壮实之体，而且邪气也很轻，所以身体有寒热交替，脉象微弱。如果强行发汗，必然会导致双手交叉护住心口、脐下悸动等变证。所以用桂枝汤的四分之二来运行阳气，用越婢汤的四分之一来运行阴液。所谓运行阴液，就是发越脾气并运行胃中的津液，使得阳气调和、津液生成而脉象恢复，令患者通过似有若无的微汗而病愈。大凡突发疾病发热，脉象虽弱但治法应从外感考虑；久病脉弱，即使热势盛，治法也应从内伤考虑，这是关键所在。尤在泾《伤寒贯珠集》中说：[桂枝汤]与麻黄合剂，就能发挥麻黄的全部功效，同时去除其猛烈之性；与石膏同用，就能资助石膏的益处，而不扰乱药权的平衡。虽然是麻黄、石膏并用，但实际上以桂枝为主，因为如果不滋养营卫，就没有发汗散邪的基础。凡是正气不足，邪气也微弱，但仍然需要通过出汗来解除病邪的，适宜参考这三方。）后人不能充分运用桂枝的功效，而寻求人参、当归、地黄之类的药物，立意虽然相同，但用药差异很大了。”
Treating Taiyang disease (a syndrome caused by pathogenic factors invading the Taiyang channel), characterized by fever and aversion to cold, with heat predominating over cold, and a faint pulse. This condition is referred to as "Wu Yang" (here indicating depletion of Yang Qi and body fluids, rather than pure Yang deficiency), and diaphoresis (sweating therapy) is contraindicated.
Gui Zhi Tang (Cinnamon Twig Decoction) two parts, Yue Bi Tang (Yuebi Decoction) one part, combined and decocted to yield two sheng (approx. 400ml). Take one sheng warm.
Gui Zhi Ma Huang Ge Ban Tang (Guizhi Mahuang Half-and-Half Decoction) assists righteous Qi to expel pathogens, inducing mild diaphoresis. When Taiyang disease resembles malaria, even if the pulse is faint, if there is excess heat and no sweat, dispersal is still required. (Taiyang disease resembling malaria with a faint pulse indicates deficiency of both Yin and Yang; sweating, vomiting, and purging are all prohibited. However, when heat exceeds cold, the face has a hot color, the body has no sweat, and the skin itches as if insects were crawling under the skin, it is due to pathogenic factors stagnating in the exterior, attempting to exit but unable to do so. Although the faint pulse prohibits strong sweating, the presence of excess heat and anhidrosis necessitates some form of sweating. Thus, this method is established. The power to assist righteous Qi equals the power to scatter pathogens; only mild sweating should be achieved to avoid the risk of massive sweating leading to collapse of Yang.) Why does wind malaria belong to the Taiyang channel? Because its episodes occur without interruption. (Taiyang disease resembling malaria occurs two or three times a day, unlike Shaoyang malaria which occurs once a day. Since wind pathogenic factors lodge in the skin, wanting to exit but unable to, the onset and cessation are irregular, hence later generations named it "Wind Malaria".) There is also Gui Zhi Er Yue Bi Yi Tang (Guizhi Two-Yuebi One Decoction), whose main indications are slightly different. This is because the patient has sweat, so the dosage of Gui Zhi is higher, making the dispersing action more gentle. (This concept is similar to Gui Zhi Ma Huang Ge Ban Tang. However, this formula is used after profuse sweating, hence Gui Zhi is slightly heavier and Ma Huang is slightly lighter.) As for the method of Gui Zhi Er Yue Bi Yi Tang, it applies to cases where constitution is weak and pathogenic factors are also slight. "Wu Yang" refers to the loss of fluids in the Yang aspect; the meaning of faint pulse and excess heat should be carefully considered. (This "Wu Yang" differs from "Wang Yang" [collapse of Yang]. "Wu Yang" here means the loss of fluids in the Yang aspect. Generally, the person is not robust, and the pathogenic factor is light, resulting in alternating chills and fever with a faint pulse. If forced sweating is applied, it will inevitably lead to complications such as crossing hands over the heart and palpitations below the umbilicus. Therefore, two-fourths of Gui Zhi Tang is used to circulate Yang Qi, and one-fourth of Yue Bi Tang is used to circulate Yin fluids. Circulating Yin fluids means stimulating Pi Qi (Spleen Qi) to transport fluids in the Stomach, thereby harmonizing Yang, generating fluids, restoring the pulse, and allowing resolution through mild sweating. Generally, for acute febrile diseases, even if the pulse is weak, treatment should follow external contraction principles; for chronic diseases with a weak pulse, even if heat is severe, treatment should follow internal injury principles. This is the key point. You Zaijing in *Shanghan Guan Zhu Ji* stated: [When Gui Zhi Tang] is combined with Ma Huang, it can fully utilize the efficacy of Ma Huang while removing its harshness; when used with Shi Gao (Gypsum Fibrosum), it can augment the benefits of Shi Gao without disrupting the balance of powers. Although Ma Huang and Shi Gao are used together, Gui Zhi is actually the principal herb, because without nourishing Ying Wei (Nutritive and Defensive Qi), there would be no basis for inducing sweating to expel pathogens. For cases where righteous Qi is insufficient, pathogenic factors are slight, yet resolution still requires sweating, one should refer to these three formulas.) Later generations failed to fully utilize the functions of Gui Zhi and instead sought herbs like Ren Shen (Ginseng Radix), Dang Gui (Angelicae Sinensis Radix), and Di Huang (Rehmanniae Radix). While the intent was similar, the medication differed significantly."