痰喘证宜此，俟气平就枕，然后以消痰润肺养阴开胃之方以次调之。
麻黄（去节） 芍药 细辛 干姜 甘草（炙） 桂枝（去皮，各三两） 五味子（半斤） 半夏（半斤，汤洗）
上八味，以水一斗，先煮麻黄，减二升，去上沫，纳诸药，煮取三升，去渣，温服一升。
若微利者，去麻黄，加荛花如鸡子大，熬令赤色。利属下焦阴分，不可更发其阳。荛花，《明理论》作芫
花；恐误。本草荛花、芫花，花叶相近，而荛花不常用，当时已不可得，故改用芫花，以其皆有去水之功也。
若渴者，去半夏。如栝蒌根三两。本草栝蒌根主消渴，若噎者，“噎”古作“KT ”。论云∶寒气相搏，则为
肠鸣。医乃不知，而反饮冷水，令汗大出，水得寒气，冷必相搏，其人即KT 。
按《内经》无“噎”字，疑即呃逆之轻者。去麻黄，
加附子一枚炮。《本草》∶附子温中。若小便不利，少腹满，去麻黄，加茯苓四两。小便不利而少腹满，则
水不在上而在下矣，故用茯苓。若喘者，去麻黄，加杏仁半升，去皮尖。杏仁见前。
按∶此方专治水气。盖汗为水类，肺为水源，邪汗未尽，必停于肺胃之间，病属有形，非一味发散所
能除，此方无微不到，真神剂也。
伤寒表不解，发汗未透。心下有水气，即未出之汗。干呕发热而咳，或渴、或利、或噎、或小便不利，
少腹满、或喘者，小青龙汤主之。以上皆水停心下现症，其每症治法，皆在加减中。
伤寒心下有水气，咳而微喘，发热不渴，凡水停心下者，喘而不渴。服汤已，即小青龙汤也，渴者，
此寒气去欲解也，寒饮欲去。小青龙汤主之。此倒笔法，即指“服汤已”三字，非谓欲解之后，更
服小青龙汤也。
For phlegm-fluids asthma syndrome (Tan Chuan Zheng), this formula is suitable. Wait until the breath stabilizes before going to bed, and then sequentially regulate with formulas that resolve phlegm, moisten the lungs, nourish yin, and benefit the stomach.
Ephedrae Herba (Mahuang, 麻黄) [devoid of joints], Paeoniae Radix (Shaoyao, 芍药), Asari Radix (Xixin, 细辛), Zingiberis Rhizoma Recens (Ganjiang, 干姜), Glycyrrhizae Radix et Rhizoma (Gancao, 甘草) [roasted], Cinnamon Twig (Guizhi, 桂枝) [devoid of bark], each three liang; Schisandrae Fructus (Wuweizi, 五味子) half jin; Pinelliae Rhizoma (Banxia, 半夏) half jin, washed with boiling water.
The above eight ingredients: Use one dou of water. First decoct Ephedrae Herba (Mahuang, 麻黄) until the volume reduces by two sheng. Remove the foam on the surface. Add the remaining herbs. Decoct to obtain three sheng of liquid. Strain out the dregs. Take one sheng warm.
If there is slight diarrhea, remove Ephedrae Herba (Mahuang, 麻黄) and add Wikstroemiae Caulis (Ranghua, 荛花) the size of a chicken egg, stir-fried until reddish. Diarrhea originates from the yin aspect of the lower jiao; it should not be treated by further dispersing yang. In *Ming Li Lun*, Ranghua is written as Yuanhua; this may be an error. According to materia medica, the flowers and leaves of Ranghua and Yuanhua are similar, but Ranghua is rarely used and was already unavailable at that time, so Yuanhua was substituted because both possess the efficacy of removing fluid retention.
If there is thirst, remove Pinelliae Rhizoma (Banxia, 半夏) and add Trichosanthis Radix (Gualougen, 栝蒌根) three liang. The materia medica states that Trichanthis Radix treats Xiao Ke (wasting-thirst syndrome). If there is a sensation of choking ("Ye", anciently written as "KT"), the text says: When cold qi combats each other, it causes borborygmus. Physicians, unaware of this, instead give cold water, causing profuse sweating. When water encounters cold qi, the coldness combats, resulting in the patient experiencing a sensation of choking.
Note: The *Nei Jing* does not contain the character "Ye"; it is suspected to refer to mild hiccup (E Ni, 呃逆). Remove Ephedrae Herba (Mahuang, 麻黄) and add one prepared Aconiti Lateralis Radix (Fuzi, 附子). The *Ben Cao* states: Fuzi warms the middle. If there is difficulty in urination and fullness in the lower abdomen, remove Ephedrae Herba (Mahuang, 麻黄) and add Poria (Fuling, 茯苓) four liang. Difficulty in urination with lower abdominal fullness indicates that the water is not in the upper but in the lower part; therefore, Poria is used. If there is asthma/wheezing, remove Ephedrae Herba (Mahuang, 麻黄) and add Semen Armeniacae Amarum (Xingren, 杏仁) half sheng, devoid of skin and tips. See Xingren mentioned previously.
Note: This formula specializes in treating water qi (Shui Qi, 水气). Sweat belongs to the category of water; the lung is the source of water. If pathogenic sweat is not fully resolved, it must stagnate between the lung and stomach. The pathology involves tangible pathogens, which cannot be eliminated by simple dispersing methods alone. This formula is comprehensive and meticulous, truly a miraculous agent.
In Shang Han (Cold Damage) where the exterior pattern is unresolved and sweating has not penetrated thoroughly. There is water qi under the heart (Xin Xia, 心下), which refers to unreleased sweat. Symptoms include dry retching, fever, and cough; or thirst, or diarrhea, or choking sensation, or difficulty in urination, lower abdominal fullness, or wheezing. These are primarily treated with Xiao Qing Long Tang (Minor Blue Dragon Decoction). All the above are manifestations of water stagnation under the heart; the treatment method for each symptom lies within the modifications of the formula.
In Shang Han with water qi under the heart, cough with slight wheezing, fever without thirst. Whenever water stagnates under the heart, wheezing occurs without thirst. After taking the decoction, i.e., Xiao Qing Long Tang (Minor Blue Dragon Decoction), if thirst appears, this indicates that the cold qi is departing and the condition is about to resolve; the cold-fluid is about to dissipate. Xiao Qing Long Tang (Minor Blue Dragon Decoction) is the primary formula. This is a reverse narrative technique, referring to the phrase "after taking the decoction," not implying that Xiao Qing Long Tang (Minor Blue Dragon Decoction) is taken again after the condition resolves.