治前证服药后，外感之火已消，而渴与泻仍未全愈。或因服开破之药伤其气分，致滑泻不止。其人或兼
喘逆，或兼咳嗽，或自汗，或心中怔忡者，皆宜急服此汤。
生山药（两半） 怀熟地（两半） 野台参（八钱） 滑石（五钱） 生杭芍（五钱） 甘草（二钱）
酸石榴（一个，连皮捣烂）
上药七味，用水五盅，先煎酸石榴十余沸，去滓再入诸药，煎汤两盅，分二次温饮下。若无酸石榴，可
用牡蛎（ 研）一两代之。汗多者，加山萸肉（去净核）六钱。
寒温诸证，最忌误用破气之药。若心下或胸胁疼痛，加乳香、没药、楝子、丹参诸药，腹疼者加芍药，皆
可止疼。若因表不解，束其郁热作疼者，解表清热，其疼自止。若误服槟榔、青皮、郁金、枳壳诸破气之品，
损其胸中大气，则风寒乘虚内陷，变成结胸者多矣。即使传经已深，而肠胃未至大实，可降下者，则开破与寒
凉并用，亦易使大便滑泻，致变证百出。愚屡见此等医者误人，心甚恻怛。故与服破气药而结胸者，制荡胸汤
以救其误。服破气药而滑泻者，制此汤以救其误。究之，误之轻者可救，误之重者实难挽回于垂危之际也。
治胸中素蕴实热，又受外感。内热为外感所束，不能发泄。
时觉烦躁，或喘、或胸胁疼，其脉洪滑而长者。
连翘（一两） 生石膏（六钱，捣细） 蝉蜕（二钱，去足土） 牛蒡子（二钱，炒捣）
喘者，倍牛蒡子。胸中疼者加丹参、没药各三钱。胁下疼者，加柴胡、川楝子各三钱。
此方所主之证，即《伤寒论》大青龙汤所主之证也。然大青龙汤宜于伤寒，此则宜于温病。至伤寒之病，
其胸中烦躁过甚者，亦可用之以代大青龙，故曰犹龙也。
一妇，年三十余。胸疼连胁，心中发热。服开胸、理气、清火之药不效。后愚诊视，其脉浮洪而长。知其
上焦先有郁热，又为风寒所束，则风寒与郁热相搏而作疼也。治以此汤，加没药、川楝子各四钱，一剂得汗而愈。
一叟，年过七旬。素有劳病。因冬令伤寒，劳病复发，喘而且咳，两三日间，痰涎壅盛，上焦烦热。诊其
脉，洪长浮数。投以此汤，加玄参、潞参各四钱，一剂汗出而愈。
门人刘××，曾治一人，年四十。外感痰喘甚剧。四五日间，脉象洪滑，舌苔白而微黄。刘××投以此汤，
方中石膏用一两，连翘用三钱。一剂周身得汗，外感之热已退，而喘未全愈。再诊其脉，平和如常，微嫌无力。
遂用拙拟从龙汤，去苏子，加潞参三钱，一剂全愈。愚闻之喜曰∶外感痰喘，小青龙汤所主之证也。拙拟犹龙
汤，原以代大青龙汤，今并可代小青龙汤，此愚之不及料也。将方中药味轻重，略为加减，即能另建奇功，以
斯知方之运用在人，慧心者自能变通也。
按∶连翘原非发汗之药，即诸家本草，亦未有谓其能发汗者。惟其人蕴有内热，用至一两必然出汗，且其
发汗之力缓而长。为其力之缓也，不至为汪洋之大汗，为其力之长也，晚睡时服之，可使通夜微觉解肌。且能
舒肝气之郁，泻肺气之实，若但目为疮家要药，犹未识连翘者也。用连翘发汗，必色青者方有
力。盖此物嫩则青，老则黄。凡物之嫩者，多具生发之气，故凡发汗所用之连翘，必须青连翘。
治疗上述证候，服药后外感的热邪已经消除，但口渴和腹泻仍未完全痊愈。可能是因为服用了开破（行气破滞）的药物损伤了气分，导致滑泻（大便失禁样腹泻）不止。患者如果兼有气喘逆乱，或者兼有咳嗽，或者自汗，或者心中悸动不安的，都应当立即服用此汤。
生山药（七十五克） 怀熟地（七十五克） 野台参（二十四克） 滑石（十五克） 生杭芍（十五克） 甘草（六克）
酸石榴（一个，连皮捣烂）
以上七味药，用水一千毫升，先煎煮酸石榴十余次沸腾，滤去渣滓，再加入其他药物，煎取药液四百毫升，分两次温服。如果没有酸石榴，可以用牡蛎（研末）三十克代替。出汗多的，加山萸肉（去净核）十八克。
寒温（泛指外感热病）各类证候，最忌讳误用破气（耗散正气）的药物。如果心下或胸胁疼痛，加入乳香、没药、川楝子、丹参等药物，腹痛者加芍药，都可以止痛。如果是因表证未解，束缚郁热而致疼痛的，解除表邪并清泄热邪，疼痛自然停止。如果误服槟榔、青皮、郁金、枳壳等破气之品，损伤了胸中的大气（宗气），那么风寒就会乘虚内陷，变成结胸（痰水互结于胸膈）的情况就很多了。即使病邪传经已深，而肠胃并未到大实大满的程度，可以使用攻下法的，此时若将开破药与寒凉药并用，也容易导致大便滑泻，从而引发各种变证。我屡次见到这类医生误人子弟，心里非常悲痛。所以对于服用破气药而导致结胸的患者，我制定了荡胸汤来补救其错误。对于服用破气药而导致滑泻的患者，制定此汤来补救其错误。总之，误治较轻的可以挽救，误治严重的在危重之际实在难以挽回。
治疗胸中原本蕴积实热，又感受外邪。内热被外感所束缚，不能发泄。
时常觉得烦躁，或者气喘，或者胸胁疼痛，脉象洪大、滑利且长的。
连翘（三十克） 生石膏（十八克，捣碎） 蝉蜕（六克，去掉足土） 牛蒡子（六克，炒后捣碎）
气喘的，加倍牛蒡子用量。胸中疼痛的，加丹参、没药各九克。胁下疼痛的，加柴胡、川楝子各九克。
此方所主治的证候，就是《伤寒论》中大青龙汤所主治的证候。但是大青龙汤适宜于伤寒，此方则适宜于温病。至于伤寒病，如果胸中烦躁特别严重的，也可以用此方代替大青龙汤，所以命名为“犹龙”（如同龙一样）。
有一位妇女，三十多岁。胸痛牵连胁部，心中发热。服用开胸、理气、清火的药物无效。后来我诊视，她的脉象浮大、洪盛且长。知道她上焦先有郁热，又被风寒所束缚，于是风寒与郁热相互搏结而作痛。用此汤治疗，加入没药、川楝子各十二克，一剂药后出汗而痊愈。
有一位老人，七十多岁。素有劳损性疾病。因为冬季感受伤寒，劳病复发，气喘而且咳嗽，两三天间痰涎壅盛，上焦烦热。诊察他的脉象，洪大、长、浮、数。投以此汤，加入玄参、潞党参各十二克，一剂药后出汗而痊愈。
门人刘××，曾治疗一个人，四十岁。外感引起的痰喘非常严重。四五天后，脉象洪大滑利，舌苔白而微黄。刘××投以此汤，方中石膏用三十克，连翘用九克。一剂药后周身得汗，外感的热邪已退，但气喘未完全痊愈。再诊其脉，平和如常，只是略微显得无力。于是使用我拟定的从龙汤，去掉苏子，加入潞党参十二克，一剂药后完全痊愈。我听说后高兴地说：外感痰喘，是小青龙汤所主治的证候。我拟定的犹龙汤，原本是用来代替大青龙汤的，现在还可以代替小青龙汤，这是我当初没有预料到的。对方中药味的轻重略作加减，就能另建奇功，由此可知方的运用在于人，聪慧的人自然能够变通。
按语：连翘本来不是发汗的药，即使是各家本草著作，也没有说它能发汗的。只有当人体蕴含有内热时，用到三十克必然出汗，而且它的发汗之力缓和而持久。因为其力缓和，不至于造成大汗淋漓；因为其力持久，晚上睡觉前服用，可以使整夜微微感觉肌表解除了束缚。而且能疏舒肝气的郁结，泻除肺气的实邪，如果仅仅把它看作疮疡家的重要药物，那还是没有真正认识连翘。用连翘发汗，必须选用青色者才有力。因为这个植物嫩的时候是青色，老的时候是黄色。凡是嫩的东西，多具有生发之气，所以凡是用连翘发汗，必须用青连翘。
To treat the aforementioned condition, after taking the medicine, the external pathogenic fire has dissipated, yet thirst and diarrhea remain unresolved. This may be due to the damage of the Qi aspect (the functional activities of the body) caused by the ingestion of Qi-breaking medicines (herbs that break up stagnation and consume Qi), resulting in unceasing slippery diarrhea (involuntary loose stools). If the patient additionally presents with panting and rebellious Qi, or cough, or spontaneous sweating, or palpitations, this decoction should be administered urgently.
Raw Dioscoreae Rhizoma (Shanyao) [75g]
Prepared Rehmanniae Radix (Shudi) [75g]
Wild Taishen Ginseng (Taishen) [24g]
Talcum (Huashi) [15g]
Raw Paeoniae Radix Alba (Baishao) [15g]
Licorice Root (Gancao) [6g]
Pomegranate (Suan Shiliu) [1 whole, crushed with peel]
The above seven ingredients are boiled in 1000ml of water. First, boil the pomegranate for about ten boiling cycles, remove the dregs, then add the remaining herbs. Decoct until 400ml remains, divide into two doses, and take warm. If pomegranate is unavailable, Oyster Shell (Muli) [30g, powdered] can be used as a substitute. For excessive sweating, add Cornus Fruit (Shanzhuyu) [18g, pits removed].
In various conditions of Cold-Warm diseases (a general term for exogenous febrile diseases), it is most taboo to mistakenly use Qi-breaking medicines. If there is pain in the epigastrium or chest and hypochondrium, adding Frankincense (Ruxiang), Myrrh (Moyao), Fructus Toosendan (Chuanlianzi), and Salvia Miltiorrhiza Radix et Rhizoma (Danshen) can stop the pain; for abdominal pain, adding Paeoniae Radix Alba (Baishao) is effective. If the pain is caused by the exterior not being resolved, trapping stagnant heat, resolving the exterior and clearing heat will naturally stop the pain. However, if one mistakenly ingests Qi-breaking items such as Areca Seed (Binglang), Green Tangerine Peel (Qingpi), Curcuma Longa Rhizoma (Yujin), and Aurantii Fructus Immaturus (Zhiqiao), damaging the Great Qi (Zongqi) in the chest, wind-cold will sink inward through the deficiency, often transforming into Chest Binding (Jie Xiong, accumulation of phlegm-fluids in the chest/diaphragm). Even if the disease has transmitted deeply through the meridians, and the intestines and stomach have not reached a state of severe excess where purgatives are indicated, using Qi-breaking medicines together with cold-cooling medicines can easily cause slippery diarrhea, leading to myriad complications. I have frequently witnessed such physicians harming patients, feeling deep compassion. Therefore, for those who developed Chest Binding after taking Qi-breaking medicines, I formulated Dangxiong Tang (Chest-Sweeping Decoction) to remedy the error. For those who developed slippery diarrhea after taking Qi-breaking medicines, I formulated this decoction to remedy the error. Ultimately, mild errors can be remedied, but severe errors at a critical juncture are truly difficult to reverse.
To treat a condition where solid heat is originally accumulated in the chest, compounded by an external contraction. The internal heat is constrained by the external pathogen and cannot vent.
The patient occasionally feels irritability, or experiences panting, or chest/hypochondriac pain, with a pulse that is surging (Hong), slippery (Hua), and long (Chang).
Forsythiae Fructum (Lianqiao) [30g]
Raw Gypsum Fibrosum (Shi Gao) [18g, crushed]
Cicada Slough (Chantui) [6g, feet and soil removed]
Arctii Fructum (Niubangzi) [6g, stir-fried and crushed]
For panting, double the dosage of Arctii Fructum (Niubangzi). For chest pain, add Salvia Miltiorrhiza Radix et Rhizoma (Danshen) and Myrrh (Moyao), each 9g. For hypochondriac pain, add Bupleuri Radix (Chaihu) and Fructus Toosendan (Chuanlianzi), each 9g.
The condition primarily treated by this formula corresponds to the condition treated by Da Qing Long Tang (Major Blue Dragon Decoction) in the *Shanghan Lun* (Treatise on Cold Damage). However, Da Qing Long Tang is suitable for Shanghan (Cold Damage), whereas this formula is suitable for Wenbing (Warm Diseases). In cases of Shanghan where chest irritability is extremely severe, this formula can also be used to replace Da Qing Long Tang; hence the name "Youlong" (Resembling the Dragon).
A woman, over thirty years old, suffered from chest pain radiating to the hypochondrium and heat in the heart. Medicines for opening the chest, regulating Qi, and clearing fire were ineffective. Upon my examination, her pulse was floating, surging, and long. I determined that she had pre-existing stagnant heat in the Upper Jiao (Upper Burner), which was constrained by wind-cold, causing the wind-cold and stagnant heat to contend and produce pain. She was treated with this decoction, added with Myrrh (Moyao) and Fructus Toosendan (Chuanlianzi), each 12g. After one dose, she sweated and recovered.
An elderly man, over seventy years old, suffered from a chronic consumptive disease. Due to contracting cold in winter, his consumptive disease relapsed, presenting with panting and cough. Within two to three days, phlegm-saliva became abundant, and there was烦热 (irritability and heat) in the Upper Jiao. His pulse was surging, long, floating, and rapid. He was administered this decoction, added with Scrophulariae Radix (Xuanshen) and Codonopsis Radix (Lushen), each 12g. After one dose, he sweated and recovered.
My student Liu XX once treated a forty-year-old male with severe phlegm-panting due to external contraction. After four to five days, his pulse was surging and slippery, and his tongue coating was white with slight yellow. Liu XX prescribed this decoction, using 30g of Raw Gypsum (Shi Gao) and 9g of Forsythiae Fructum (Lianqiao). After one dose, he sweated profusely, the external heat subsided, but the panting was not fully resolved. Re-examining the pulse, it was peaceful and normal, though slightly weak. Subsequently, I used Conglong Tang (Following Dragon Decoction), removing Perillae Fructum (Suzi) and adding Codonopsis Radix (Lushen) 12g. After one dose, full recovery was achieved. Hearing this, I rejoiced and said: Phlegm-panting due to external contraction is the indication for Xiao Qing Long Tang (Minor Blue Dragon Decoction). My Youlong Tang was originally intended to replace Da Qing Long Tang, but now it can also replace Xiao Qing Long Tang. This was beyond my initial expectation. By slightly adjusting the heaviness and lightness of the herbal ingredients, remarkable efficacy can be achieved anew. This demonstrates that the application of formulas depends on the practitioner; those with wisdom can adapt flexibly.
Note: Forsythiae Fructum (Lianqiao) is inherently not a diaphoretic (sweat-inducing) herb, nor do various materia medica texts claim it induces sweating. Only when the person harbors internal heat does a dosage of 30g inevitably induce sweating, and its diaphoretic power is gentle yet prolonged. Because its power is gentle, it avoids profuse sweating; because its power is prolonged, taking it before sleep allows for a mild muscle-relieving effect throughout the night. Furthermore, it soothes Liver Qi stagnation and drains Lung Qi excess. To view it merely as an essential herb for sores and ulcers is to fail to truly understand Forsythiae Fructum. When using Forsythiae Fructum to induce sweating, green specimens must be used for potency. This herb is green when tender and yellow when mature. Generally, tender plants possess vigorous ascending and dispersing Qi; therefore, Forsythiae Fructum used for inducing sweating must be green Forsythiae Fructum.