桂枝一两十七铢 芍药一两六铢 麻黄（去节）十六铢 甘草一两二铢 杏仁（去皮
、尖）十六枚 生姜（切）一两六铢 大枣（擘）五枚
右七味，以水五升，先煮麻黄一、二沸，去上沫，内诸药，煮取二升，去滓，温服一
升，日再服。
【集解】
张璐曰：详此方药品，与各半不殊，惟铢分稍异，而证治攸分，可见仲景于差多差少
之间，分毫不苟也。
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太阳病，得之八、九日，如疟状，发热恶寒，热多寒少，其人不呕，清便欲自可，一
日二、三度发，脉微缓者，为欲愈也；脉微而恶寒者，此阴阳俱虚，不可更发汗，更
下更吐也；面色反有热色者，未欲解也，以其不能得小汗出，身必痒，宜桂枝麻黄各
半汤。
【注】
太阳荣卫两伤，风多寒少之病，得之八、九日，有如疟状之寒热，热多寒少，其人不
呕，小便清白者，此里和不受邪，虽为欲愈，然必审其人，如疟状之寒热，一日二、
三度，轻轻而发。诊其脉微且缓，则知邪已衰，正欲复，表里将和，始为欲愈也。若
脉微不缓，是正犹未复，恶寒是邪犹未衰，尚不能自愈，但已为前之汗、吐、下，虚
其表里，不可更发汗，更下、更吐也。脉微恶寒，表里俱虚，则面色当白，今色反赤
，犹有余邪怫郁于表，不能得小汗出，宣发阳气，故面赤身痒，未欲解也，宜桂枝麻
黄各半汤，小小汗之，以和荣卫，自可愈也。
【集注】
吴人驹曰：此不专事桂枝，而兼合乎麻黄者，谓其面热身痒，邪在轻虚浮浅之处，惟
麻黄能达也。
桂枝一两十七铢 芍药一两六铢 麻黄（去节）十六铢 甘草一两二铢 杏仁（去皮、尖）十六枚 生姜（切）一两六铢 大枣（擘开）五枚
以上七味药，用水五升，先煮麻黄一两次沸腾，去掉上面的浮沫，加入其他药物，煮取两升药液，去掉药渣，温服一升，一天服用两次。
【集解】
张璐说：详细考察此方的药品组成，与各半汤没有不同，只是剂量分量略有差异，而证候治疗因此区分，可见张仲景在差多差少之间，分毫不苟且。
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太阳病（太阳经受邪所致的病证），患病八、九天，像疟疾的症状，发热恶寒（发热的同时怕冷），热多寒少，病人不呕吐，大小便基本正常，一天发作两、三次，脉象微缓的，是想要痊愈的表现；脉象微而恶寒的，这是阴阳俱虚，不可以再发汗，不能再攻下或催吐；面色反而有热色的，是还没有解除，因为不能得到小汗出，身体必定发痒，适宜用桂枝麻黄各半汤。
【注】
太阳荣卫（营气和卫气）两伤，风多寒少的病证，患病八、九天，有如疟疾症状的寒热往来，热多寒少，病人不呕吐，小便清白的，这是里气调和不受邪气干扰，虽然为欲愈之象，然而必须审察其人，如疟疾症状的寒热，一天两、三次，轻轻发作。诊察其脉象微且缓，则知道邪气已衰，正气欲复，表里将和，这才算是欲愈。如果脉微不缓，是正气尚未恢复，恶寒说明邪气尚未衰退，尚不能自愈，但如果已经经过之前的汗、吐、下法治疗，导致表里虚弱，就不可以再发汗，不能再攻下或催吐。脉微恶寒，表里俱虚，则面色应当白，现在面色反赤，还有余邪郁结在体表，不能得到小汗出，宣发阳气，所以面赤身痒，还没有解除，适宜用桂枝麻黄各半汤，微微发汗，以调和荣卫，自然可以痊愈。
【集注】
吴人驹说：此方不专门使用桂枝，而是兼合麻黄，是因为面热身痒，邪气在轻虚浮浅之处，只有麻黄能通达。
Guizhi Tang (Cinnamon Twig Decoction) one liang and seventeen zhu, Shaoyao (Peony Root) one liang and six zhu, Mahuang (Ephedrae Herba, 麻黄) (devoid of nodes) sixteen zhu, Gancao (Glycyrrhizae Radix et Rhizoma, 甘草) one liang and two zhu, Xingren (Prunus Armeniaca Seed, 杏仁) (devoid of skin and tips) sixteen pieces, Shengjiang (Zingiberis Rhizoma Recens, 生姜) (sliced) one liang and six zhu, Dazao (Jujubae Fructus, 大枣) (split open) five pieces.
The above seven ingredients are boiled in five sheng of water. First, boil Mahuang for one or two boils, remove the foam on the surface, then add the remaining herbs. Boil until two sheng of liquid remain, remove the dregs, and take one sheng warm. Take twice a day.
[Collected Explanations]
Zhang Lu said: A detailed examination of the medicinal composition of this formula reveals no difference from Ge Ban Tang (Half-and-Half Decoction), except for slight variations in dosage. This distinction in symptoms and treatment demonstrates that Zhang Zhongjing was meticulous even in minor differences.
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Taiyang Bing (Disease of the Taiyang Channel) occurring after eight or nine days presents with symptoms resembling malaria, including fever and aversion to cold, with more heat than cold. The patient does not vomit, and bowel movements and urination are relatively normal. If these episodes occur two or three times a day and the pulse is slightly slow and moderate, it indicates impending recovery. If the pulse is faint and accompanied by aversion to cold, it signifies deficiency of both Yin and Yang; sweating, purging, or vomiting should not be induced further. If the facial complexion appears reddish due to heat, the condition has not yet resolved because slight perspiration cannot be achieved, leading to body itching. Guizhi Mahuang Ge Ban Tang (Cinnamon Twig and Ephedra Half-and-Half Decoction) is appropriate.
[Annotation]
This condition involves injury to both Ying Qi (Nutritive Qi) and Wei Qi (Defensive Qi) of the Taiyang channel, characterized by predominant wind pathogen and scanty cold pathogen. After eight or nine days, chills and fever resembling malaria occur, with more heat than cold. The absence of vomiting and clear urine indicate harmonious interior conditions free from pathogenic invasion. Although this suggests impending recovery, one must observe if the chills and fever occur lightly two or three times daily. A slightly slow and moderate pulse indicates declining pathogenic factors and recovering healthy qi, suggesting harmony between interior and exterior, marking true recovery. If the pulse is faint but not slow, healthy qi has not yet recovered, and persistent aversion to cold indicates lingering pathogens unable to resolve spontaneously. If previous treatments with sweating, vomiting, or purging have weakened the interior and exterior, further induction of sweating, purging, or vomiting is contraindicated. Faint pulse and aversion to cold indicate dual deficiency of interior and exterior, typically presenting with pale complexion. However, a reddish face indicates residual pathogens stagnating at the exterior, preventing slight perspiration and the dissemination of Yang Qi, resulting in facial redness and body itching without resolution. Guizhi Mahuang Ge Ban Tang (Cinnamon Twig and Ephedra Half-and-Half Decoction) should be used to induce mild sweating, harmonize Ying and Wei Qi, and ensure recovery.
[Collected Notes]
Wu Renju stated: This formula does not exclusively rely on Guizhi Tang (Cinnamon Twig Decoction) but combines it with Mahuang (Ephedrae Herba, 麻黄). This is because the facial heat and body itching indicate pathogens located in superficial and deficient areas, which only Mahuang can reach effectively.