甘温无毒。出天竺昆仑诸国，安南三佛齐亦皆有之。其质如 胶者为苏合油
。色微绿如雉斑者良，微黄者次之，紫赤者又次之。以簪挑起径尺不断如丝渐渐屈起如钩者
为上，以少许擦手心香透手背者真。忌经火。
发明 苏合香聚诸香之气而成，能辟恶杀鬼精物，治温疟蛊毒、痫痉，去三虫，除邪，
能透诸窍藏，辟一切不正之气。凡痰积气厥，必先以此开导，治痰以理气为本也。凡山岚瘴
湿之气，袭于经络，拘急弛缓不均者，非此不能除，但性燥气窜，阴虚多火人禁用。
即冰片
辛苦温有毒。忌见火。
发明 龙脑香窜入骨，风病在骨髓者宜之；若风在血脉肌肉用之，反引风入骨髓也。其
味大辛善走，故能散热，通利关格结气，张云岐人参散、柏子仁汤等方多用之。其治目痛喉
痹下疳，取其辛温而散火郁也。时珍曰，古方皆言龙脑辛凉入心，故目疾惊风及痘疮心热、
血瘀倒靥者，用猪心血为引，使毒散于外则疮发，此似是而非也。目痛惊风及痘，皆火病火
郁，则发之从治之法，辛温发散故也。使壅塞通利，经络条达，而惊热自平，疮毒能出。然
不可多用，多用则真气立耗矣。人有急难欲自尽者，顿吞两许立毙，为其辛烈立能散尽真气
也。世人误以为寒，不知辛散之性，似乎凉耳。治火证，舌出寸许用冰片掺上即缩，引火归
元也。目病属阴虚者不宜入点。
苏合香：味甘、性温，无毒。产于天竺、昆仑等各国，安南、三佛齐等地也都有出产。其质地像胶状的是苏合油。颜色微绿如同野鸡羽毛斑纹的为上品，颜色微黄的次之，紫红色的又次之。用发簪挑起后长度达一尺不断裂，像丝线一样慢慢弯曲如钩的是上品；取少许涂抹在手心，香气能透入手背的是真品。忌用火加热。
发明（理论阐释）：苏合香汇聚了各种香料的香气，能够驱除邪恶、杀灭鬼精之物，治疗温疟、蛊毒、癫痫痉挛，去除体内的寄生虫，祛除邪气，能够穿透各个孔窍和脏腑，驱散一切不正之气。凡是痰浊积聚导致的气机厥逆，必须先用此药来开导，因为治疗痰证以调理气机为根本。凡是山间林地的瘴湿之气，侵袭经络，导致肢体拘急或弛缓不均的情况，非此药不能除去，但因其性质燥烈、气味窜行，阴虚且多火的人禁用。
发明（理论阐释）：龙脑香窜入骨髓，对于风病在骨髓者适宜使用；如果风邪在血脉肌肉中而使用它，反而会将风邪引入骨髓。其味道大辛，善于走窜，因此能够散热，通利关格及结聚之气，张云岐的人参散、柏子仁汤等方剂中多用此药。它治疗目痛、喉痹、下疳，是利用其辛温之性来发散火郁。李时珍说，古方都说龙脑辛凉入心，所以眼疾、惊风以及痘疮心热、血瘀倒靥（痘疹内陷）的患者，用猪心血作为引经药，使毒素散发于外部从而促使痘疮发出，这看似有理实则错误。目痛、惊风及痘疮，都属于火病和火郁，采用“从治”的方法，即用辛温发散之法。使壅塞得以通利，经络条达顺畅，那么惊热自然平息，疮毒能够排出。然而不可多用，多用则真气立刻耗损。有人遇到急难想要自尽，吞服两许（约几十克）就会立即死亡，因为其辛烈之性能立刻散尽真气。世人误以为它是寒性的，不知道它具有辛散的性质，只是感觉似乎凉爽罢了。治疗火证，舌头伸出寸许，用冰片撒在上面即可缩回，这是引火归元的作用。属于阴虚的眼病患者不宜使用冰片点眼。
Suhexiang (Styrax): Sweet in taste, warm in nature, non-toxic. Originates from countries such as Tianzhu (India) and Kunlun, and is also produced in Annan (Vietnam) and Samfelchi (Sumatra). Its texture resembling gum is known as Suhexia You (Suhexia Oil). The best quality has a slightly green color like the plumage of a pheasant; those with a slightly yellow color are inferior; those with a purple-red color are even worse. The highest grade is identified by lifting it with a hairpin: if it stretches to a length of one chi without breaking, behaves like silk, and slowly curls up like a hook, it is superior. Authenticity is verified by rubbing a small amount on the palm; if the fragrance penetrates through to the back of the hand, it is genuine. It must not be exposed to fire.
Invention (Theoretical Explanation): Suhexiang gathers the qi of various aromatic substances. It can repel evil influences and kill demonic spirits. It treats warm malaria, gu poison, epilepsy, and spasms; eliminates three types of parasites; removes pathogenic factors; and penetrates all orifices and zang-fu organs, dispelling all abnormal qi. In cases of phlegm accumulation leading to qi rebellion (Jue syndrome), this herb must first be used to open and guide the flow, as treating phlegm fundamentally requires regulating qi. For miasmic dampness from mountainous regions invading the meridians, causing uneven muscle tension or flaccidity, only this herb can eliminate it. However, due to its dry and penetrating nature, it is strictly contraindicated for individuals with yin deficiency and excessive internal heat.
Longnaoxiang (Borneol): Pungent and bitter in taste, warm in nature, toxic. Contraindicated when exposed to fire.
Invention (Theoretical Explanation): Longnaoxiang penetrates deeply into the bone marrow; it is suitable for wind diseases located in the bone marrow. If wind pathogens are in the blood vessels and muscles, using it may instead draw the wind deeper into the bone marrow. Its pungent flavor allows it to move rapidly, thus it can dissipate heat and unblock Guan-Ge (obstruction) and stagnant qi. Formulas such as Zhang Yunqi's Ginseng Powder (Renshen San) and Bi Zi Ren Tang (Bi Zi Ren Decoction) frequently include this herb. It treats eye pain, throat obstruction (Houbi), and chancres (Xiagan) by utilizing its pungent-warm property to disperse fire stagnation. Li Shizhen stated that ancient formulas describe Longnaoxiang as pungent-cool entering the Heart meridian. Therefore, for eye diseases, convulsions, and carbuncles with heart heat or inverted eruption (Dao Ye) due to blood stasis, pig heart blood was used as an guiding agent to scatter toxins outward, thereby promoting eruption. This view is plausible yet incorrect. Eye pain, convulsions, and carbuncles are all fire diseases involving fire stagnation. The treatment method follows the principle of "treating according to the nature" (Cong Zhi), employing pungent-warm dispersing methods. By unblocking congestion and smoothing the meridians, convulsive heat naturally subsides, and carbuncle toxins can be expelled. However, it should not be used in large doses, as excessive use will immediately deplete the True Qi (Zhen Qi). Individuals in desperate situations who wish to commit suicide may die instantly after swallowing two xu (approx. 60g), because its pungent and fierce nature can instantly dissipate the True Qi. People mistakenly believe it is cold; they do not realize its pungent-dispersing nature merely feels cool. In treating fire syndromes, if the tongue protrudes several cun, applying Borneol causes it to retract, which exemplifies guiding fire back to its source (Yin Huo Gui Yuan). It is unsuitable for eye conditions caused by yin deficiency.