长夏湿热蒸炎, 四肢困倦, 精神减少, 身热气高,
烦心便黄, 渴而自汗, 脉虚者, 此方主之.
人参 黄耆 甘草 白术 神麴 五味子 青皮 升麻 干葛 麦冬
黄柏 泽泻 广橘皮 苍术钱半 当归, 姜三片, 枣二枚, 去核,
水煎服.
【集注】吴琨曰: 暑令行于夏至, 长夏则兼湿令矣. 此方兼而治之.
炎暑则表气易泄, 兼湿则中气不固. 黄耆所以实表, 白术, 神麴, 甘
草所以调中. 酷暑横流, 肺金受病, 人参, 五味, 麦冬, 所以补肺,
敛肺, 清肺, 经所谓扶其所不胜也. 火盛则水衰, 故以黄柏, 泽泻,
滋其化源. 津液亡则口渴, 故以当归, 干葛, 生其胃液. 清气不升,
升麻可升; 浊气不降, 二皮可理. 苍术之用, 为兼长夏之湿也. 程应
旄曰: 人知清暑, 我兼益气, 以暑伤气也. 益气不独金能敌火, 凡气
之上腾而为津, 为液者, 回下即为肾中之水. 水气足, 火淫自却也.
治痿厥之病, 腰以下痿软不能动, 行走不正, 两足欹侧
.
黄连 黄柏 ( 酒炒 ) 柴胡以上各一分 麦冬 当归身 生地 猪
苓 炙甘草 神麴以上各二分 人参 白茯苓 升麻以上各三分 橘
皮 白术 泽泻以上各五分 苍术一钱 黄耆一钱五分 五味九枚,
右?? 咀, 如麻豆大, 水二盏半, 煎一盏, 去滓, 空心温服.
【注】清暑益气汤与此方均治湿暑之剂: 清暑益气汤, 治暑盛于湿,
暑伤气, 所以四肢困倦, 精神减少, 烦渴身热, 自汗脉虚, 故以补气
为主, 清暑为兼, 稍佐去湿之品, 从令气也. 此方治湿盛于暑, 湿伤
形,所以李杲曰: 六, 七月之间, 湿令大行, 子能令母实, 湿助热旺
而刑燥金, 绝其寒水生化之源, 源绝则肾亏, 痿厥之病作矣. 故以清
暑变为清燥, 佐泻热利湿之药, 从邪气也. 是方即清暑益气汤. 去葛
根者, 以无暑外侵之肌热也. 加二苓者, 专去湿也. 加黄连, 生地,
专泻热也. 二苓佐二术, 利水燥湿之力倍. 连, 地佐黄柏, 救金生水
之功多. 中气益, 则阴火熄而肺清矣. 湿热除, 则燥金肃而水生矣.
肺清水生, 则湿热痿厥之病, 未有不愈者也. 但此方药味, 性偏渗泻
,若施之于冬春, 水竭髓枯骨痿, 或非湿热为病者, 反劫津液, 其病
愈甚, 则为谬治矣.
长夏季节湿热交蒸，出现四肢困倦、精神萎靡、身体发热且体温较高、心烦、小便黄赤、口渴并伴有自汗、脉象虚弱的症状时，此方主治。
人参、黄芪、甘草、白术、神曲、五味子、青皮、升麻、干葛（葛根）、麦冬、黄柏、泽泻、广橘皮、苍术（用量钱半）、当归，生姜三片，大枣二枚（去核），用水煎煮后服用。
【集注】吴琨说：暑气在夏至时节盛行，到了长夏则兼有湿气的主令。这个方剂同时治疗暑和湿。炎热暑气容易导致体表之气外泄，兼夹湿气则导致中焦之气不固。使用黄芪是为了充实表气，使用白术、神曲、甘草是为了调理中焦。酷暑肆虐，肺金受到损害，使用人参、五味子、麦冬，是为了补益肺气、收敛肺气、清肃肺气，这正是《内经》所说的扶持被克制的脏腑（土生金，火克金，此处指通过补肺来抵御火邪或顺应五行相生）。火气过盛则肾水衰少，所以用黄柏、泽泻来滋生化之源（肾水）。津液耗失则导致口渴，所以用当归、干葛来滋生胃中津液。清气不能上升，可用升麻提升；浊气不能下降，可用陈皮、青皮理气降浊。使用苍术，是因为兼治长夏的湿气。程应旄说：人们只知道清解暑热，我兼以益气，因为暑邪会损伤正气。益气不仅能以金制火，而且凡是上腾化为津、液的气，回归下行即成为肾中的水。肾水充足，火邪淫溢自然消除。
治疗痿厥病，表现为腰部以下痿软无力无法活动，行走姿态不正，双脚歪斜。
黄连、黄柏（酒炒）、柴胡（以上各一分）、麦冬、当归身、猪苓、炙甘草、神曲（以上各二分）、人参、白茯苓、升麻（以上各三分）、陈皮、白术、泽泻（以上各五分）、苍术一钱、黄芪一钱五分、五味子九枚。将上述药物捣碎如麻豆大小，用水两盏半，煎煮至一盏，滤去药渣，空腹温服。
【注】清暑益气汤与此方（清燥汤）都是治疗湿暑的方剂：清暑益气汤，主治暑邪盛于湿邪，暑邪损伤正气，所以出现四肢困倦、精神减少、烦渴身热、自汗脉虚等症状，因此以补气为主，清暑为兼，稍加祛湿的药物，这是顺应主令之气（长夏湿气当令）。此方主治湿邪盛于暑邪，湿邪损伤形体，所以李杲说：在六七月之间，湿气大行，湿（水）能助长其母（金/脾土？此处原文逻辑较复杂，通常指湿困脾土，或水生木等，但原文意指湿盛导致病理变化），湿助热势旺盛而克制燥金，断绝了寒水（肾）化生的源头，源头断绝则肾亏，痿厥之病就产生了。因此将此方由清暑变为清燥，佐以泻热利湿的药物，这是针对邪气进行治疗。这个方子就是清暑益气汤，去掉葛根，是因为没有暑邪外侵引起的肌表发热。加入猪苓、茯苓，是专门为了祛湿。加入黄连、生地，是专门为了泻热。茯苓、猪苓辅助白术、苍术，利水燥湿的力量加倍。黄连、生地辅助黄柏，救肺金生水（金生水）的功效更多。中气得到补益，则阴火熄灭而肺脏清肃。湿热被清除，则燥金肃降而肾水滋生。肺清肾水滋生，那么湿热导致的痿厥之病，没有不痊愈的。但是这个方子的药味，性质偏向渗利泻下，如果施用于冬春季节，遇到水竭髓枯骨痿的患者，或者非湿热引起的疾病，反而会劫夺津液，使病情加重，那就是错误的治疗了。
During the late summer season, when damp-heat steams and roasts, presenting with symptoms of four limbs fatigue, reduced spirit, body heat with high temperature, vexation, yellow urine, thirst accompanied by spontaneous sweating, and a deficient pulse, this formula is indicated.
Renshen (Ginseng Radix), Huangqi (Astragali Radix), Gancao (Licorice Radix et Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma), Shenqu (Massa Medicata Fermentata), Wuweizi (Schisandrae Fructus), Qingpi (Citri Reticulatae Pericarpium Viride), Shengma (Cimicifugae Rhizoma), Gegen (Puerariae Lobatae Radix), Maidong (Ophiopogonis Radix), Huangbai (Phellodendri Cortex), Zexie (Alismatis Rhizoma), Guangjupi (Citri Reticulatae Pericarpium), Cangzhu (Atractylodis Lanceae Rhizoma, 1.5 qian), Danggui (Angelicae Sinensis Radix), Ginger (3 slices), Jujube (2 pieces, pitted). Decoct in water and take orally.
[Collected Annotations] Wu Kun stated: The pathogen of Summerheat prevails after the Summer Solstice, while during Late Summer, it combines with Dampness. This formula treats both simultaneously. Intense Summerheat easily causes the Wei Qi (Defensive Qi) at the exterior to leak, and combined Dampness leads to instability of the Middle Qi. Huangqi is used to consolidate the exterior; Baizhu, Shenqu, and Gancao are used to regulate the Middle. When severe heat flows rampant, the Lung Metal is damaged; Renshen, Wuweizi, and Maidong are used to tonify, astringe, and clear the Lung, which corresponds to the classic principle of supporting the element that is overcome (i.e., strengthening Metal against Fire or Earth to generate Metal). When Fire is excessive, Water declines; thus, Huangbai and Zexie are used to nourish the source of transformation (Kidney Water). When fluids are lost, thirst occurs; therefore, Danggui and Gegen are used to generate Stomach fluids. If Clear Qi fails to ascend, Shengma can lift it; if Turbid Qi fails to descend, Chenpi and Qingpi can regulate it. The use of Cangzhu is for addressing the Dampness of Late Summer. Cheng Yingmao said: People know how to clear Summerheat, but I also tonify Qi because Summerheat damages Qi. Tonifying Qi not only allows Metal to counteract Fire, but any Qi that rises to become Jin (thin fluids) and Ye (thick fluids), when returned downward, becomes the Water within the Kidneys. When Kidney Water is sufficient, the excess of Fire naturally subsides.
To treat Wei-Jue syndrome (Atrophy and Paralysis), characterized by flaccidity and inability to move below the waist, abnormal gait, and deviated feet.
Huanglian (Coptidis Rhizome), Huangbai (Phellodendri Cortex, wine-fried), Chaihu (Bupleuri Radix) [each 1 fen], Maidong (Ophiopogonis Radix), Dangguishen (Angelicae Sinensis Radix - Heart), Shengdi (Rehmanniae Radix), Zhuling (Polyporus), Zhigancao (Prepared Licorice Radix et Rhizoma), Shenqu (Massa Medicata Fermentata) [each 2 fen], Renshen (Ginseng Radix), BaiFuling (Poria with Hostwood), Shengma (Cimicifugae Rhizoma) [each 3 fen], Chenpi (Citri Reticulatae Pericarpium), Baizhu (Atractylodis Macrocephalae Rhizoma), Zexie (Alismatis Rhizoma) [each 5 fen], Cangzhu (Atractylodis Lanceae Rhizome, 1 qian), Huangqi (Astragali Radix, 1.5 qian), Wuweizi (Schisandrae Fructus, 9 pieces). Pound the above herbs into fragments the size of hemp seeds. Decoct in 2.5 cups of water until 1 cup remains, strain, and take warm on an empty stomach.
[Note] Both Qingshu Yiqi Tang (Clear Summerheat and Tonify Qi Decoction) and this formula (Qingzao Tang) are agents for treating Damp-Heat and Summerheat. Qingshu Yiqi Tang treats cases where Summerheat is predominant over Dampness, damaging Qi, manifesting as four-limb fatigue, reduced spirit, vexation, thirst, body heat, spontaneous sweating, and a deficient pulse. Therefore, it focuses on tonifying Qi, clearing Summerheat as secondary, and slightly adding damp-draining herbs to follow the dominant seasonal qi (Late Summer Dampness). This formula treats cases where Dampness is predominant over Summerheat, damaging the form/body. As Li Gao stated: Between the sixth and seventh lunar months, Dampness prevails greatly. "The child makes the mother full" (referring to the generative cycle or pathological transmission), Dampness assists Heat, causing it to flourish and attack Dry Metal (Lung), severing the source of Cold Water (Kidney) generation. When the source is severed, Kidney deficiency occurs, leading to Wei-Jue disease. Thus, the formula shifts from clearing Summerheat to clearing Dryness, assisting with heat-purging and damp-draining herbs to address the pathogenic factor. This formula is essentially Qingshu Yiqi Tang minus Gegen (Puerariae Radix) because there is no exterior muscle heat from external Summerheat invasion. Plus Zhuling and Fuling specifically to remove Dampness. Plus Huanglian and Shengdi specifically to purge Heat. Fuling and Zhuling assist Baizhu and Cangzhu, doubling the power of diuresis and drying Dampness. Huanglian and Shengdi assist Huangbai, enhancing the功 (merit) of saving Lung Metal to generate Kidney Water. When Middle Qi is benefited, Yin Fire extinguishes and the Lung clears. When Damp-Heat is removed, Dry Metal becomes肃 (solemn/clear) and Kidney Water generates. With a clear Lung and generated Kidney Water, the disease of Wei-Jue caused by Damp-Heat will inevitably heal. However, the herbs in this formula have properties biased towards leaching and purging. If applied in Winter or Spring to patients with exhausted Water, dried marrow, and bone atrophy, or those whose illness is not caused by Damp-Heat, it will instead劫 (plunder) Body Fluids, worsening the condition, which would be erroneous treatment.