凡治病用药，若得其宜，未有不效者。痧之为病，乃感受四时不正之气，故当以驱邪为
主，养正非所先也。宜疏散不宜大表，宜下降不宜升提，宜凉解不宜辛热，宜清理不宜滞涩
，宜消导不宜补益，宜开通不宜收敛，宜行气不宜补气，宜活血不宜补血，佐之以解毒，兼
之以清火，化气以消其胀，行血以逐其邪，此用药之大法也。又须因病制宜。用荆芥、防风
之类者，从表而散也。用陈皮、青皮之类者，从中而消也。用枳实、大黄之类者，从大便而
下也。用木通、泽泻之类者，从小便而下也。山楂、莱菔，所以治其食之阻，槟榔、莪术，
所以驱其积之滞，香附、砂仁，所以开其气之闭，红花、银花，所以活其血之凝，此因病用
药之大法也。
用药一差，凶危立见。先知其忌，则思过半矣。参、 、白术、山药，恐补毒瓦斯，痧所
大禁。熟地、白芍，补血敛血，痧所大忌。甘草，用之恐成痧块，难治。一应甘甜之味俱不
宜。茯苓、猪苓，恐其渗湿，转实痧气，俱在禁例。半夏、白芷，苍术，性燥忌用。升麻、
禁用，恐提痧气，上升难遏。麻黄，发表太过，禁用。肉桂、附子、吴茱萸，禁用，恐助毒
，立时有变。干姜能助热毒，当忌（过服冷水宜少用，以善散寒气）。五味子、木瓜，酸敛
忌用。竹沥，性寒忌用，用须姜汁，方走经络，不如弗用为佳。杜仲、补骨脂、枸杞子，即
腰疼不可用。茯神、柏子仁、酸枣仁，即虚烦不寐，亦不可用。苁蓉、巴戟，尤所大忌。
评∶半夏、藿香止吐。凡治吐症用半夏、藿香，独痧症作吐，半夏性燥，须防益助火邪
，必不可用。藿香惟取其正气以治秽触，倘肠胃有食积、血瘀，阻滞痧毒，骤用此以止吐，
反有闭门逐盗之忧。
凡是治疗疾病使用药物，如果用药得当，没有不生效的。痧症这种病，是由于感受了四时不正之气所致，所以应当以驱除邪气为主，扶正养正不是首要任务。治疗宜疏散而不宜大发汗解表，宜降泄而不宜升提，宜凉性解毒而不宜辛热，宜清利疏通而不宜滞涩，宜消食导滞而不宜补益，宜开通而不宜收敛，宜行气而不宜补气，宜活血而不宜补血。辅以解毒，兼以清火，化气以消除胀满，行血以驱逐邪气，这是用药的大法。另外还必须根据病情制定适宜的治疗方案。使用荆芥、防风这类药物的，是为了从体表发散邪气。使用陈皮、青皮这类药物的，是为了从中焦消除积滞。使用枳实、大黄这类药物的，是从大便向下排出邪气。使用木通、泽泻这类药物的，是从小便向下排出邪气。山楂、莱菔子，是用来治疗食物阻滞的；槟榔、莪术，是用来驱除积滞的；香附、砂仁，是用来开通气机闭塞的；红花、金银花，是用来活血化瘀凝滞的，这是因病用药的大法。
用药一旦有差错，凶险危急的情况立刻就会出现。预先知道禁忌，就掌握了治疗的一半关键。人参、（此处原文缺字，通常指党参或类似补气药，依文意暂略或视为泛指补气药）、白术、山药，恐怕会补助毒瓦斯，是痧症的大禁。熟地黄、白芍，补血且收敛血液，是痧症的大忌。甘草，使用它恐怕会形成痧块，难以治疗。一切甘甜的味道都不适宜。茯苓、猪苓，恐怕它们渗湿利水，反而使痧气变得坚实，都在禁忌之列。半夏、白芷、苍术，性质燥烈，忌讳使用。升麻，（原文缺字，结合语境及后文禁用原因，通常指升提之品如柴胡等，但此处仅列升麻），忌讳使用，恐怕提升痧气，使其上升而难以遏制。麻黄，发表太过，禁止使用。肉桂、附子、吴茱萸，禁止使用，恐怕助长毒势，立刻产生变故。干姜能助长热毒，应当忌用（如果是因为过服冷水导致的寒证，可以少量使用，以善于散寒气）。五味子、木瓜，酸敛之性，忌讳使用。竹沥，性质寒凉，忌讳使用，如果使用必须配合姜汁，才能走经络，不如不用为好。杜仲、补骨脂、枸杞子，即使是腰疼也不可用。茯神、柏子仁、酸枣仁，即使是虚烦不眠，也不可用。肉苁蓉、巴戟天，更是大忌。
评注：半夏、藿香可以止吐。凡是治疗呕吐症状使用半夏、藿香的，唯独痧症引起的呕吐，半夏性质燥烈，必须防止更加助长火邪，绝对不可用。藿香只是取其正气来治疗秽浊之气触犯，如果肠胃有食积、血瘀，阻滞了痧毒，突然使用这些药来止吐，反而有“闭门逐盗”（关起门来让盗贼在里面）的担忧。
Whenever treating diseases and administering medication, if the treatment is appropriate, there is no case where it fails to be effective. Sha disease (a condition caused by pathogenic factors) arises from contracting the abnormal Qi of the four seasons; therefore, the primary approach should be to expel pathogens, while nourishing righteousness (Zheng Qi) is not the priority. Treatment should favor dispersing and diffusing rather than heavy sweating; descending and purging rather than lifting and raising; cooling and resolving rather than acrid and hot; clearing and unblocking rather than stagnating and astringent; digesting and guiding out rather than tonifying; opening and unblocking rather than consolidating; moving Qi rather than supplementing Qi; invigorating blood rather than nourishing blood. Assist with detoxification, combine with clearing fire, transform Qi to eliminate distension, move blood to drive out pathogens. This is the general principle of medication. Furthermore, one must tailor the treatment to the specific disease. Using herbs like Jingjie (Schizonepetae Herba) and Fangfeng (Saposhnikoviae Radix) is for dispersing from the exterior. Using herbs like Chenpi (Citri Reticulatae Pericarpium) and Qingpi (Citri Reticulatae Pericarpium Viride) is for eliminating from the middle jiao. Using herbs like Zhishi (Aurantii Fructus Immaturus) and Dahuang (Rhei Radix et Rhizoma) is for downward expulsion via the large intestine. Using herbs like Mutong (Akebiae Caulis) and Zexie (Alismatis Rhizoma) is for downward expulsion via the small intestine. Shanzha (Crataegi Fructus) and Laifuzi (Radish Seed) are used to treat food obstruction; Binglang (Arecae Semen) and Ezhu (Curcumae Rhizoma) are used to drive out accumulation stagnation; Xiangfu (Cyperi Rhizoma) and Sharen (Amomi Fructus) are used to open Qi closure; Honghua (Carthami Flos) and Yinhua (Lonicerae Japonicae Flos) are used to invigorate stagnant blood. This is the general principle of using medication according to the disease.
If medication is administered incorrectly, danger and危重 conditions will appear immediately. Knowing the contraindications in advance means half the battle is won. Renshen (Ginseng Radix), [text missing], Baizhu (Atractylodis Macrocephalae Rhizoma), and Shanyao (Dioscoreae Rhizoma) may tonify toxic Qi and are strictly forbidden in Sha disease. Shudihuang (Rehmanniae Radix Praeparata) and Baishao (Paeoniae Radix Alba) nourish blood and astringe blood, which are strictly taboo for Sha disease. Gancao (Glycyrrhizae Radix et Rhizoma) should be avoided as it may cause Sha masses, making treatment difficult. All sweet-tasting substances are unsuitable. Fuling (Poria) and Zhuling (Polyporus) may promote fluid metabolism but could solidify Sha Qi, so they are included in the prohibitions. Banxia (Pinelliae Rhizoma), Baizhi (Angelicae Dahuricae Radix), and Cangzhu (Atractylodis Rhizoma) have drying properties and are contraindicated. Shengma (Cimicifugae Rhizoma) is contraindicated, as it may lift Sha Qi upward, making it difficult to restrain. Mahuang (Ephedrae Herba) causes excessive sweating and is prohibited. Rougui (Cinnamomi Cortex), Fuzi (Aconiti Lateralis Radix Praeparata), and Wuzhuyu (Evodiae Fructus) are prohibited, as they may assist toxicity and cause immediate changes. Ganjiang (Zingiberis Rhizoma) can assist heat toxicity and should be avoided (if caused by excessive consumption of cold water, it may be used sparingly to disperse cold). Wuweizi (Schisandrae Fructus) and Mugua (Chaenomelis Fructus) have sour and astringent properties and are contraindicated. Zhuli (Bambusa Textilis Catillus Juice) is cold in nature and contraindicated; if used, Ginger Juice must be added to guide it through the meridians, but it is better not to use it at all. Duzhong (Eucommiae Cortex), Buguzhi (Bastard's Cistanche Fruit), and Gouqizi (Lycii Fructus) should not be used even for lower back pain. Fushen (Poria with Hostwood), Baiziren (Biota Seed), and Suanzaoren (Ziziphi Spinosae Semen) should not be used even for deficiency-related irritability and insomnia. Congrongu (Cistanches Herba) and Bajitian (Morinda Officinalis Root) are especially taboo.
Commentary: Banxia and Huoxiang can stop vomiting. In general vomiting cases, Banxia and Huoxiang are used; however, for Sha disease-induced vomiting, Banxia's drying nature must be guarded against as it may exacerbate fire pathogens, so it is absolutely contraindicated. Huoxiang (Patchouliae Leaves) is only used for its pure Qi to treat turbid pathogenic factors. If there is food accumulation or blood stasis in the intestines and stomach blocking Sha toxins, suddenly using these herbs to stop vomiting carries the risk of "locking the door to chase away the thief" (trapping the pathogen inside).