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(The three formulas for Xianxiong Decoction and the five formulas for Xiexin Decoction are in *Baoming Ji*, omitted here.)

Examples of Modifications to Lizhong Tang:
If affected by cold or dampness, add Fuzi (Aconite Lateral Root) 1-2 liang, which becomes Fuzi Lizhong Tang.
If suffering from Huoluan (cholera-like syndrome with vomiting and diarrhea), add Juhong (Tangerine Peel) and Qingju (Green Tangerine Peel) each 1-2 liang, which becomes Zhizhong Tang.
If suffering from Gan Huoluan (dry cholera with inability to vomit or defecate) and severe heart/abdominal pain, first administer a small amount of salt water; once expelled, then administer this medicine.
If accompanied by vomiting, add Dingxiang (Clove) and Banxia (Pinellia Rhizome) each 1 liang to Zhizhong Tang; decoct together with 10 slices of Shengjiang (Fresh Ginger) per dose.
If suffering from loose stools, add Juhong and Fuling (Poria) each 1-2 liang, which becomes Buzhong Tang.
If loose stools persist, add Fuzi 1 liang to Buzhong Tang; if there is aversion to drinking and undigested food in stool, add Suazhenren (Amomum Fruit) 1 liang, totaling eight ingredients.
If suffering from Huoluan with vomiting, heart/abdominal pain, and cold extremities, remove Baizhu (Atractylodes Macrocephala Rhizome) from the base formula and add Shu Fuzi (Prepared Aconite), named Sishun Tang.
If suffering from Shanghan (Cold Damage) JieXiong (chest binding syndrome), first decoct Jiegeng (Platycodon Root) and Zhike (Bitter Orange Fruit) in equal parts; if ineffective, or after various vomiting/diarrhea syndromes presenting with chest oppression nearing collapse, high epigastric region, acute pain intolerable to touch, add Zhishi (Immature Bitter Orange) and Fuling each 1-2 liang, which becomes Zhishi Lizhong Tang.
If thirsty, add Gualougen (Trichosanthes Root) 1 liang to Zhishi Lizhong Tang.
If cramps occur after Huoluan, add Huoshi Gao (Calcined Gypsum) 1 liang to Lizhong Tang.
If there is pulsation above the navel, indicating Kidney Qi movement, remove Baizhu and add Guigui (Cinnamon Bark) 1.5 liang. Since the Kidney dislikes dryness, it is said that Baizhu may induce Ben Tun (voluptuous gas rising from lower abdomen); thus Guigui is added.
If palpitations are frequent, add Fuling 1 liang.
If desiring to drink water, add Baizhu 0.5 liang.
If severely averse to cold, add Ganjiang (Dried Ginger) 0.5 liang.
If abdominal fullness occurs, remove Baizhu and add Fuzi 1 liang.
If caused by excessive alcohol consumption or eating roasted/fried hot foods leading to nosebleeds (Bi Nie), add Chuanxiong (Ligusticum Rhizome) 1 liang.
If stomach injury leads to hematemesis (vomiting blood), this medicine regulates the Middle Jiao, differentiates Yin and Yang, and stabilizes blood vessels; use only the base formula.
If poisoned by Fuzi, also use the base formula.
If using only Gancao (Licorice Root) and Ganjiang in equal parts decocted, still resolve toxicity with Dou (Black Soybean) decoction.

Examples of Modifications to Pingwei San:
For spleen dampness causing diarrhea, add Fuling, Dingxiang, and Baizhu, termed Tiaowei San; alternatively, add Huoxiang (Patchouli) and Banxia.
If adding Ganjiang, it becomes Nongpo Tang.
For Wen Yi (plague epidemic) seasonal qi, where two toxins injure cold causing headache and high fever, add Lianxu (Lotus Stamen), Congbai (Scallion White) 5 cun, and Douchi (Fermented Soybeans) 30 grains; decoct and take 2-3 doses until slight sweating occurs for cure.
For Wu Lao Qi Shang (five labors and seven injuries) with heat in palms/soles, irritability, and generalized joint soreness, add Chaihu (Bupleurum Root).
For phlegm cough and malaria, add Jiang Zhi Banxia (Ginger-processed Pinellia).
For organ-specific Qi pain, add Huixiang (Fennel).
For fire Qi rushing and fullness, add Sangbaipi (Mulberry Root Bark).
For women’s red and white leukorrhea, add Huangbo (Phellodendron Bark).
For alcohol injury, add Dingxiang.
For cold drink and food injury, add Gaoliangjiang (Galangal Rhizome).
For slippery/prolapse diarrhea, add Roudoukou (Nutmeg).
For wind-phlegm causing heavy and lethargic limbs, add Jingjie (Schizonepeta Spike).
For cold pain in legs/knees, add Niuxi (Achyranthes Root).
For general body edema and stiffness, add Digupi (Wolfiporia Cortex/Dogwood Bark - *Note: Context suggests Digupi usually refers to Lycii Cortex, but text says Digupi which is often Dogwood/Cornus, however in some contexts Digupi is used for clearing deficiency heat. Given "Xu Yong" (deficiency swelling), Digupi (Lycii Cortex) is common, but literal translation is Digupi*). *Correction based on standard herb list*: Digupi typically refers to Cornus Officinalis Fructus in some older texts or Lycium Bark. In modern WHO terms, Digupi is often Lycii Cortex. However, strictly following text: Digupi.
For damp bi-syndrome in legs/knees, add Tusizi (Cuscuta Seed).
For white dysentery, add Wuzhuyu (Evodia Fruit).
For red dysentery, add Huanglian (Coptis Rhizome).
For Tou Feng (head wind/headache), add Ben Cao (Ligusticum Sinense Rhizome).
For cramps/Huoluan, add Nanmu Pi (Nanmu Bark).
For Qi Xie Liu Ji (seven evils and six extremes) manifesting as tinnitus, nocturnal emission, night sweats, heavy limbs, weak/sore legs/knees, and women’s uterine cold with irregular menstruation, add Rougui (Cinnamon Bark).
For stomach cold with severe vomiting, add more Shengjiang; alternatively, add Fuling and Dingxiang each 3 liang, totaling six ingredients.
For stagnant Qi and epigastric obstruction, add Suazhenren and Xiangfu (Cyperus Rhizome) each 3 liang, decoct with Shengjiang.
If combined equally with Wuling San, it becomes Duijin Yinzi.
If combined with Liuyi San, it becomes Huangbai San.
If combined with Qian Shi Yigong San, it becomes Tiaowei San.
To promote appetite, add Shenqu (Medicated Leaven), Maiya (Barley Sprout), Wuzhuyu, Shuzhuo (Sichuan Pepper), Ganjiang, and Guizhi (Cinnamon Twig), becoming Wuzhuyu Tang.
If adding Ben Cao and Jiegeng, it becomes Hejie San, treating Shanghan with vomiting/diarrhea.
If adding Huoxiang and Banxia, it becomes Jinbuhuan Zhengqi San.
For malaria with alternating chills and fever, add Chaihu.
For Xiao Chang Qi Tong (Small Intestine Qi pain), add Kelian (Melia Toosendan Fruit) and Huixiang.