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Muxiang (Costus Root), Tanxiang (Sandalwood), Baikouren (White Cardamom Seed), Dingxiang (Clove) (each 3 liang), Sharen (Amomum Fruit) (4 liang), Gancao (Licorice Root, roasted), Huoxiang (Patchouli Herb) (each 0.5 liang).
Grind all ingredients into a fine powder. Take 2 qian per dose, administered with salt water.
This formula is the primary treatment for epigastric hiccups originating from the Middle Jiao (Middle Burner).
The Middle Jiao is the sea of water and grain, the region of granaries. Epigastric hiccups here are attributed to disturbances in grain qi; therefore, Sharen and Baikouren are used to resolve food stagnation, Muxiang, Dingxiang, Tanxiang, and Huoxiang are used to regulate qi, Gancao is used to harmonize the middle jiao, and salt water is used to moisten and direct downward. One might ask: How can one distinguish between epigastric hiccups of the Middle Jiao and those of the Lower Jiao?
I say: Those of the Lower Jiao arise after severe illness, whereas those of the Middle Jiao occur after eating. Furthermore, Middle Jiao hiccups are mild and short, while Lower Jiao hiccups are severe and prolonged; the distinction is clear.

Preface states: Fanwei (Regurgitation/Inverted Stomach) is a condition that has puzzled physicians since ancient times. If the stomach cavity has not yet withered, it is treatable. Even if it has withered, careful medication can still prolong life. However, acting hastily without examining the pathology will not only be ineffective but also harmful. Herein are six examinations; one should apply them flexibly beyond their literal meaning.

Jiuji (Chinese Chive Juice), Niurui (Cow's Milk) (equal parts).
Sip slowly over time.
This formula is the primary treatment for cases where there is dead blood (stagnant blood) in the stomach cavity, leading to dryness and withering, pain upon eating, Fanwei (Regurgitation), and constipation.
Fanwei refers to the condition where the stomach cannot accept grain, causing food to be vomited immediately after ingestion. This disease is common among those who indulge in alcohol and have a dry, irritable, and violent temperament. The presence of stagnant blood in the stomach cavity is caused by strong wine soaking the stomach, leading to the long-term accumulation of stasis and heat. Dryness and withering are caused by dryness and heart heat. Due to dryness, eating causes pain. Due to accumulated heat, Fanwei and constipation result. Chinese chive juice is pungent and can dissolve stasis and promote blood circulation. Cow's milk is sweet and warm, nourishing blood and moistening dryness.

Lvniao (Donkey Urine), take 2 he per dose.
This formula is the primary treatment for Fanwei caused by constrained fire.
When fire is constrained in the middle, treating it with pungent and aromatic herbs to open the appetite will only exacerbate the dryness, which is inappropriate. Donkey urine is pungent and gamey; it can open constraints. As a descending turbid yin substance, it can help quell fire. During the Zhen Guan era of the Tang Dynasty, Xu Fengyu and Chai Jiang, renowned physicians at the time, were ordered by imperial decree to treat Fanwei. Despite exhausting their medical skills, they failed to cure the patients, who gradually became emaciated and weak, facing imminent death. Suddenly, a practitioner claimed that drinking donkey urine was highly effective. Taking 2 he in the morning resulted in vomiting only half the meal at noon. Taking another 2 he in the late afternoon allowed the patient to eat porridge at nightfall without vomiting. Later, this was reported to the imperial court; five or six other patients with Fanwei took it simultaneously and recovered at once. Lu He, in his "Danxi Zuanyao," mentioned adding donkey urine to prevent worm infestation, which demonstrates a lack of thorough investigation into the underlying principles.