禀天地阳升之气以生，故其味辛温而无毒。入手少阴、太阴经风药也。
细辛亦止少阴头痛，通鼻 而疗牙痛。辛能攻表，故在上之阳邪可解；温能救里，
故在里之伏邪可散。或用独活为使，止本经头痛如神，治诸风湿立效。温阴经，除内
寒，利窍通精，清痰下气，得石决明、青鱼胆、青羊肝止风泪目痛。劫剂过半钱。单服
令气塞命倾，盖辛温燥烈，不可常用。血虚头痛者，尤宜戒之。
主治（痘疹合参） 疗齿痛，开窍止嗽，百节拘挛，散头面诸风，散水湿，治内寒，
消死肌，又主喉痹。凡痘初发表，及痒塌者，间有用之，不可常用多用，惟通关散皆
用之，取散寒通窍也。
禀夏秋之阳气以生，得土之阳精而成，故性纯阳，味辛气温，无毒。形如枯骨者
佳。行积化滞，宜另磨冲服。若借以调气，宜和剂同煎，若欲止泻及治寒虚证候，宜火煨而用之。
木香，气劣。气不足能补，气胀、气窒塞能通，和胃气如神，行肝气最捷，散滞气
于肺上膈，破结气于中下焦。驱九种心疼，逐积年冷气，止霍乱吐泻，呕逆反胃，除痞
癖块，脐腹疼痛，安胎健脾，诛痈散毒。和黄连治暴痢，用火煨实大肠破气，使槟榔
和胃，佐姜桂兼除梦寐之魇。能行诸药之精，且肺气调则金能制木而肝平，怒则肝逆
而忤其元气，心有纵肝之情，而不能制，则肝独盛，得木香而心畅，则正气亦畅，肝气
何逆之有哉！实心之行肝，非肝之自行也。
主治（痘疹合参） 和胃腱脾，治痘痢散诸滞气如神。凡痘出不快者，用此顺气行
毒；而痘出自快，顶陷可起。但多用久用，恐走泄太过，而热症、燥症尤忌之。
按∶木香乃三焦气分第一等药也。气味纯阳，故能辟邪止痛。吐泻停食，脾疾也。
土喜温燥，得之即效。气郁气逆，肝疾也。木喜疏通，得之即平。胎前须顺气，故能安
胎。但纯阳香燥，阴虚切忌；辛香走泄，脱症禁之；即平人久服，亦非所宜也。
细辛禀受天地阳气上升之气而生，所以它的味道是辛温的，且没有毒性。它是进入手少阴心经和手太阴肺经的风药（祛风药）。
细辛也能治疗少阴经头痛，通鼻窍并治疗牙痛。辛味能攻散表邪，所以在上的阳邪可以解除；温性能救助里寒，所以在里的伏邪可以消散。有时用独活作为引经药，治疗本经头痛如神效，治疗各种风湿立见功效。温暖阴经，去除内寒，通利孔窍、通畅精气，清除痰浊、降逆下气，配合石决明、青鱼胆、青羊肝使用可治疗风泪目痛。用量超过半钱就是峻烈之剂。单独服用会导致气机闭塞而危及生命，因为细辛辛温燥烈，不可经常使用。血虚引起的头痛者，尤其应当禁忌。
主治（痘疹合参） 治疗齿痛，开窍止咳，治疗全身关节拘挛，疏散头面部的各种风邪，散除水湿，治疗内寒，消除死肌（坏死的肌肉组织），又主要治疗喉痹（咽喉肿痛闭塞不通）。凡是痘疹初期发表，以及出现瘙痒塌陷的情况，偶尔会使用它，但不能经常大量使用。只有在通关散中都会用到它，是为了取它散寒通窍的作用。
木香禀受夏秋季节的阳气而生，得到土地的阳精而成，所以性质纯阳，味道辛气温和，没有毒性。形状像枯骨的是佳品。用于行积化滞时，宜单独研磨后冲服。如果是借它来调气，宜与调和药剂同煎；如果想要止泻及治疗寒性虚证候，宜用火煨后使用。
木香气味较薄。气不足时可以补益，气胀、气窒塞时可以疏通，调和胃气如神效，疏泄肝气最快捷，疏散肺上膈部的滞气，破除中下焦的结气。驱除九种心痛，驱逐积年的冷气，止住霍乱吐泻、呕吐反胃，消除痞块癖积、脐腹疼痛，安胎健脾，诛杀痈疽、消散毒邪。配合黄连治疗暴痢，用火煨制可实大肠但破气，使槟榔配合以和胃，佐以干姜、肉桂兼治梦魇。能通行诸药的精华，且肺气调顺则金能克木而肝气平和，发怒则肝气上逆而损伤元气，如果心不能节制肝的情志，导致肝气独盛，得到木香后心胸舒畅，则正气也畅通，肝气哪里还会逆乱呢！这是实心（指药物本身具有的行气作用）在行肝气，而不是肝脏自己在行气。
主治（痘疹合参） 调和胃气、健脾，治疗痘痢、疏散各种滞气如神效。凡是痘疹出不顺畅的，用此药顺气行毒；而痘疹自然出得畅快，顶陷的可以起发。但是多用久用，恐怕走泄太过，热症、燥症尤其禁忌。
按语：木香是三焦气分的第一等药物。气味纯阳，所以能辟邪止痛。吐泻停食，是脾的疾病。土喜温燥，得到木香即见效。气郁气逆，是肝的疾病。木喜疏通，得到木香即平复。胎前必须顺气，所以能安胎。但是纯阳香燥，阴虚者切忌；辛香走泄，脱症禁之；即使是普通人长期服用，也不适宜。
Xixin (Asari Radix et Rhizoma) is born from the qi of yang ascending in heaven and earth; therefore, its flavor is pungent and warm, and it is non-toxic. It is a wind-dispelling herb entering the Hand-Shaoyin Heart Meridian and the Hand-Taiyin Lung Meridian.
Xixin also treats Shaoying headache, unblocks the nasal orifices, and treats toothache. The pungency can attack the exterior, thus resolving yang pathogens located above; the warmth can rescue the interior, thus dispersing latent pathogens located inside. Sometimes used with Duhuo (Angelicae Pubescentis Radix) as a guiding drug, it treats headaches of this meridian with divine efficacy and resolves various wind-dampness conditions immediately. It warms the Yin meridians, eliminates internal cold, benefits orifices and unblocks essence, clears phlegm and directs qi downward. Combined with Shijueming (Concha Arcae), Qingyudan (Gallus Pisci Nigri), and Qingyanggan (Hepar Caprae Hirci), it treats wind-tearing and eye pain. A dose exceeding half qian constitutes a drastic agent. Taken alone, it causes qi blockage and life-threatening conditions, for Xixin is pungent, warm, dry, and fierce, and should not be used frequently. Those with blood deficiency causing headache are especially cautioned against its use.
Indications (Integration with Smallpox and Measles) Treats toothache, opens orifices and stops cough, relieves spasms and contractures of all joints, disperses various winds on the head and face, dissipates water-dampness, treats internal cold, eliminates necrotic tissue, and primarily treats Houbi (obstructive sore throat). When initially releasing the exterior in smallpox/measles, or when itching and collapsing occur, it is occasionally used, but should not be used frequently or in large doses. It is included in Tongguan San (Pass-Through Powder) to utilize its ability to disperse cold and open orifices.
Muxiang (Aucklandiae Radix) is born from the yang qi of summer and autumn and formed by the yang essence of the earth; thus, its nature is purely yang, its flavor is pungent and warm, and it is non-toxic. Those resembling withered bones are superior. To move accumulation and transform stagnation, it is best ground separately and taken with liquid. If used to regulate qi, it should be decocted with harmonizing agents. If intended to stop diarrhea and treat cold-deficiency syndromes, it should be fire-roasted before use.
Muxiang has a weak aroma. When qi is insufficient, it can tonify; when there is qi distension or obstruction, it can unblock. It harmonizes Stomach qi with divine efficacy, moves Liver qi most swiftly, disperses stagnant qi in the upper chest and lungs, and breaks consolidated qi in the middle and lower jiao. It drives away nine types of heart pain, expels chronic cold qi, stops cholera-like vomiting and diarrhea, retching and reverse flow of stomach contents, eliminates痞 (fullness masses) and accumulations, umbilical and abdominal pain, calms the fetus, strengthens the Spleen, eradicates abscesses, and dissipates toxins. Combined with Huanglian (Coptidis Rhizoma), it treats sudden dysentery; fire-roasted Muxiang solidifies the Large Intestine but breaks qi; combined with Binglang (Arecae Semen) to harmonize the Stomach, and assisted by Jiang (Zingiberis Rhizoma) and Guirou (Cinnamomi Cortex) to treat nightmares. It facilitates the action of other herbs' essences. When Lung qi is regulated, Metal controls Wood, and Liver qi becomes peaceful. Anger causes Liver qi to rebel and damage Yuan qi. If the Heart cannot restrain the Liver's emotions, leading to excessive Liver qi, taking Muxang soothes the Heart, allowing Zheng qi (Upright Qi) to flow freely, preventing Liver qi rebellion. This is the substance itself moving Liver qi, not the Liver organ acting on itself.
Indications (Integration with Smallpox and Measles) Harmonizes the Stomach and strengthens the Spleen, treating smallpox/dysentery and dispersing various stagnant qi with divine efficacy. For slow eruption of rashes, it is used to smooth qi and move toxins; if eruptions are naturally rapid, depressed tops can rise. However, excessive or prolonged use may cause excessive leakage, making it contraindicated in heat syndromes and dryness syndromes.
Commentary: Muxiang is a top-tier herb for the Qi aspect of the Triple Burner. Its pure yang aroma dispels evil and stops pain. Vomiting, diarrhea, and food stagnation are Spleen diseases. Earth prefers warmth and dryness, so efficacy is immediate. Qi stagnation and rebellion are Liver diseases. Wood prefers free flow, so peace is achieved upon administration. Before childbirth, qi must be smoothed, hence it calms the fetus. However, being purely yang, aromatic, and drying, it is strictly contraindicated in Yin deficiency; its pungent-aromatic dispersing nature is forbidden in collapse syndromes; even for healthy individuals, long-term use is inadvisable.