吞酸者，湿热郁积于肝而出，伏于肺胃之间，必用 食菜蔬自养。宜用炒吴茱萸，
顺其性而
苍术、茯苓为辅佐。冬月倍茱萸，夏月倍黄连，汤浸炊饼，丸如小丸吞之。仍教以 食蔬
菜自养，即安。
戴云∶湿热在胃口上，饮食入胃，被湿热郁遏，其食不得传化，故作酸也。如谷肉在器
，湿热则易为酸也。
入方
茱萸（一两，去枝梗，煮少时，浸半日，晒干） 陈皮（一两） 苍术（米泔浸，一两） 黄连（二两
陈壁土炒，去土秤） 黄芩（一两，如上土炒）
或加桔梗一两，茯苓一两。
上为末，神曲糊丸，绿豆大。每服二三十丸，时时津液，食后服。
〔附录〕吞酸，与吐酸不同，吐酸《素问》以为热，东垣又为寒，何也？吐酸是吐出酸
。平时津液，随上升之气郁积而久，湿中生热，故从火化，遂作酸味，非热而何？其有郁
之久，不能自涌而出，伏于肺胃之间，咯不得上，咽不得下，肌表得风寒则内热愈郁，而酸
味刺心，肌表温暖，腠理开发，或得香热汤丸，津液得行，亦可暂解，非寒而何？《素问》
言热，言其本也；东垣言寒，言其末也。
附方
曲术丸 治中脘宿食留饮，酸，蜇心痛，或口吐清水。
神曲（炒，三两） 苍术（泔浸炒，一两半） 陈皮（一两）
上为末，生姜汁煮神曲糊为丸。每七十丸，姜汤下。
加味平胃散 治吞酸或宿食不化。
生料平胃散加神曲、麦芽炒，各半钱，术、朴不制。上生姜三片，水煎五钱服。
嗳气 胃中有火有痰。
入方
南星 半夏 软石膏 香附
一本有炒栀子
上作丸，或作汤服之。盖胃中有郁火，膈上有稠痰故也。
软石膏丸亦不可服，本方痰条下云∶噫气吞酸，此系食郁有热，火气冲上，黄芩为
君，南星、半夏、陈皮为佐，热多加青黛。
Swallowing acid (acid regurgitation) arises from damp-heat accumulating and stagnating in the Liver, lodging between the Lung and Stomach. It is essential to nourish oneself by consuming vegetables. It is advisable to use stir-fried Evodiae Fructus (Wuzhuyu), following its nature, with Atractodis Rhizoma Preparatum (Cangzhu) and Poria (Fuling) as adjuvant herbs. In winter, double the dosage of Evodiae Fructus; in summer, double the dosage of Coptidis Rhizoma (Huanglian). Soak these in decoction along with steamed wheat bread (Chuibing), form into small pills, and swallow them. Continue to advise the patient to nourish themselves with vegetables, and the condition will stabilize.
Dai Yuanli stated: Damp-heat resides above the stomach opening. When food enters the Stomach, it is constrained by damp-heat, preventing normal digestion and transmission, thus generating acidity. Just as grains and meats placed in containers turn sour when exposed to damp-heat.
Prescription ingredients:
Evodiae Fructus (Wuzhuyu) (1 liang, remove branches and stalks, boil briefly, soak for half a day, dry); Citri Reticulatae Pericarpium (Chenpi) (1 liang); Atractodis Rhizoma Preparatum (Cangzhu) (soaked in rice wash water, 1 liang); Coptidis Rhizoma (Huanglian) (2 liang, stir-fried with old wall soil, remove soil and weigh); Scutellariae Radix (Huangqin) (1 liang, stir-fried with soil as above).
Alternatively, add Platycodonis Radix (Jiegeng) 1 liang and Poria (Fuling) 1 liang.
Grind all ingredients into powder, bind with paste made from Medicated Leaven (Shenqu), and form pills the size of mung beans. Take 20–30 pills per dose, swallowing saliva frequently, taken after meals.
[Appendix] Swallowing acid differs from vomiting acid. The *Suwen* attributes vomiting acid to heat, while Li Dongyuan attributes it to cold. Why? Vomiting acid involves expelling acidic fluid. Normally secreted fluids, stagnant due to ascending Qi over a long period, generate heat from dampness, transforming via fire, thus becoming acidic—is this not a heat syndrome? However, in cases where stagnation persists for a long time without being expelled, lodging between the Lung and Stomach, unable to be coughed up or swallowed down, exposure to wind-cold on the body surface exacerbates internal heat stagnation, causing acidic pain piercing the heart. If the body surface is warm, pores open, or aromatic hot decoctions/pills are ingested allowing fluids to circulate, temporary relief occurs—is this not a cold syndrome? The *Suwen*’s mention of heat refers to the root cause; Li Dongyuan’s mention of cold refers to the manifestation.
Attached Prescriptions:
Quzhu Wan (Curd and Atractylodes Pill): Treats retained food and fluid in the Zhongwan region, accompanied by swallowing acid, stabbing heart pain, or vomiting clear fluid.
Medicated Leaven (Shenqu) (stir-fried, 3 liang); Atractodis Rhizoma Preparatum (Cangzhu) (soaked in rice wash water and stir-fried, 1.5 liang); Citri Reticulatae Pericarpium (Chenpi) (1 liang).
Grind into powder, bind with paste made by boiling Shenqu in ginger juice. Take 70 pills per dose, administered with ginger decoction.
Jiawei Pingwei San (Modified Pingwei Powder): Treats swallowing acid or undigested retained food.
Add stir-fried Medicated Leaven (Shenqu) and stir-fried Malto (Maiya), each 0.5 qian, to Raw Material Pingwei San. Do not process Atractodis Rhizoma (Cangzhu) and Magnoliae Officinalis Cortex (Houpo). Add 3 slices of fresh Ginger, decoct in water, and take 5 qian of the liquid.
Belching: Caused by fire and phlegm in the Stomach.
Prescription ingredients:
Arisaematis Rhizoma Preparatum (Nanxing); Pinelliae Rhizoma Preparatum (Banxia); Gypsum Fibrosum (Ruan Shigao); Cyperi Rhizoma (Xiangfu).
Some versions include stir-fried Gardeniae Fructus (Zhizi).
Form into pills or decoct for administration. This is due to stagnant fire in the Stomach and thick phlegm above the diaphragm.
Ruan Shigao Wan (Soft Gypsum Pill) should not be used. Under the phlegm section of the original formula, it states: Belching and swallowing acid result from food stagnation with heat, where fire Qi rushes upward. Scutellariae Radix (Huangqin) serves as the sovereign herb, Arisaematis Rhizoma Preparatum (Nanxing), Pinelliae Rhizoma Preparatum (Banxia), and Citri Reticulatae Pericarpium (Chenpi) serve as assistant herbs. If heat is severe, add Indigo Naturalis (Qingdai).