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Treats chest oppression and hardness due to phlegm-fluid retention, all kinds of excess pathogenic factors, as well as rebellious Qi rushing to the throat causing dyspnea; use this formula to induce vomiting.

Gua Di (Caulis Momordicae Fructus, processed until yellow) 1 fen, Chi Xiao Dou (Vigna angularis Seed) 1 fen. The above two ingredients are each separately pounded and sifted into powder, then mixed together. Take one qian bi (a measure equivalent to approximately 1-2 grams) of the powder, with Xiang Chi (Fermented Soybean) 1 he, and hot water 7 he, boil into a thin porridge, strain to remove dregs, take the decoction, mix with the powder, warm it, and take in one dose. If vomiting does not occur, gradually increase the dosage, stopping once rapid vomiting is achieved.

[Annotation] The chest is the residence of clear Yang Qi. When various pathogens enter the chest, they obstruct the diffusion and distribution of Yang Qi, leading to: chest fullness, oppression, and hardness, rising heat sensation, dry mouth, irritability, nausea with urge to vomit, and a rapid, intermittent pulse, indicating Heat stagnation and accumulation. If there is chest fullness and oppression with hardness, Qi rebelling upward to the throat causing breathing difficulty, cold hands and feet, desire to vomit but inability to do so, and a slow, tight pulse, this indicates Cold stagnation and accumulation. Generally, diseases caused by the stagnation and accumulation of Cold or Heat in the chest, combined with Qi stagnation or fluid retention, cannot be treated by sweating or purging methods alone. One must employ sour and bitter agents that induce emesis, guiding the pathogen upward via its natural tendency. This allows the Upper Jiao to become unobstructed, Yang Qi to recover, chest oppression and hardness to dissipate, and the chest to harmonize. Gua Di is extremely bitter, and Chi Xiao Dou is sour; they complement each other effectively to eliminate excess pathogens in the chest and stomach, making them the premier agent among emetic formulas. The addition of Xiang Chi porridge juice serves to leverage the grain Qi to protect Stomach Qi. If vomiting does not occur after administration, the dosage is gradually increased, and stopped immediately upon achieving rapid vomiting, out of concern for damaging the Yuan Qi of the Stomach. This formula acts swiftly, surpassing the efficacy of sweating and purging methods, thus establishing the triad of sweating, vomiting, and purging. Today's practitioners, unaware of the profound principles of Qibo and Zhang Zhongjing, discard this formula without use, which is truly lamentable!

Treats epigastric oppression where pain is elicited upon palpation, accompanied by a floating and slippery pulse.

Huang Lian (Coptidis Rhizoma) 1 liang, Ban Xia (Pinelliae Tuber) 0.5 sheng, Gua Lou Shi (Trichosanthis Fructus, large size) 1 piece. The above three ingredients are boiled in 6 sheng of water. First, boil Gua Lou Shi until reduced to 3 sheng, then strain to remove dregs. Add the remaining herbs, boil until reduced to 2 sheng, and divide into three warm doses.

[Collected Annotations] Cheng Zhi states: This condition involves Heat accumulation that has not penetrated deeply, located in the epigastrium, unlike Da Jie Xiong (Major Chest Binding) which is located higher in the chest. Pain only upon pressing is milder than tenderness where the hand cannot approach. A floating and slippery pulse is more relaxed compared to a deep and tight pulse. It occurs because the patient inherently has abundant Phlegm-Fluid, which combines with Heat pathogens to accumulate internally, resulting in a floating and slippery pulse. The acridity of Ban Xia disperses the pathogen, the bitterness of Huang Lian drains the Heat, and the bitterness and moistening nature of Gua Lou Shi cleanses the accumulation; all serve to clear Heat and dissipate binding in the chest. Boiling Gua Lou Shi first and dividing the dose into three warm administrations both reflect the method of treating the Upper Jiao gently. Cheng Yingmao states: Huang Lian clears Heat, Ban Xia guides Fluid downward, and Gua Lou Shi moistens dryness. Together, they open stagnant Qi. It is also named "Xian Xiong" (Sinking the Chest) because although the attacking force is not severe, it directly drains the excess pathogens within the chest, thereby removing them.