一名龙脑香
宣，通窃，散火
辛温。香窜善走能散，先入肺，传于心脾而透骨，通诸窍，散郁火。治惊痫痰迷（东垣
曰∶风病在骨髓者宜之。若在血脉肌肉，反能引风入骨，如油入面），目赤肤翳（乳调日点
数次。王节斋曰∶冰片大辛热，用之点眼，取其拔出火邪。盖火郁发之，从治法也。世人误
以为寒，而常用之。遂致积热害目，故云眼不点不瞎者，此也），耳聋鼻息（鼻中息肉，点
之自入，皆通窍之功），喉痹舌出（散火），骨痛齿痛（治骨），痘陷（猪心血作引，酒服或
紫草汤服，引入心经能发之）产难，三虫五痔（王纶曰∶世人误以为寒，不知辛散性甚，似
乎凉耳。诸香皆属阳，岂有香之至者，而反寒乎？昂幼时曾问家叔建侯公云∶姜性何如？叔
曰∶体热而用凉。盖味辛者多热，然辛热必借辛以散之，风热散则凉矣。此即本草所云冰片
性寒之义，向未有发明之者，附记于此）。出南番，云是老杉脂。以白如冰、作梅花片者良
（以杉木炭养之则不耗，今人多以樟脑升打乱之）。
宣，通窍，除湿
辛热香窜，能于水中发火（置水中焰益炽）。通关利滞，除湿杀虫。置鞋中去香港脚（《集
要》曰∶和乌头为末，醋丸弹子大，置足心，微火烘之，汗出为效）熏衣箧，辟疰虫。以樟
木切片，浸水煎成。升打得法，能乱冰片。
【冰片】
又名龙脑香。
具有宣通、开通孔窍、疏散郁火的功效。
性味辛温。其香气浓烈且善于走窜，能发散邪气，先入肺经，再传于心、脾二经，并能透达骨骼，通达全身各孔窍，疏散郁结之火。
主治惊风癫痫、痰迷心窍（李东垣说：风病在骨髓层面的适宜使用此药。如果病在血脉肌肉，反而会将风邪引入骨中，就像油渗入面粉一样难以去除）。
目赤肿痛、眼睑生翳（用乳汁调和后每日点眼数次。王节斋说：冰片大辛大热，用于点眼，是取其拔出火邪的作用。这属于“火郁发之”的从治法。世人误以为它是寒性药物而经常使用，导致积热伤害眼睛，所以说“眼睛不点冰片就不会瞎”，指的就是这个原因）。
耳聋、鼻息不通（鼻中息肉，点药后息肉自落，这都是开通孔窍的功效）。
喉痹、舌体肿胀外伸（疏散郁火）。
骨痛、齿痛（治疗骨病）。
痘疮内陷（以猪心血为引子，用酒送服或用紫草汤送服，引入心经从而使其透发出来）。
难产。
三虫（蛔虫、蛲虫、姜片虫等寄生虫）及五痔（多种痔疮）。
（王纶说：世人误以为冰片是寒性，不知道它辛散的性质非常强烈，只是看起来像凉性罢了。所有的香料都属于阳，怎么会有香气极浓的药物反而是寒性的呢？我小时候曾问家叔建侯公：生姜的性质如何？叔叔回答说：体质温热但作用偏凉。大概味道辛的药物多属热，然而辛热必须借助辛味来发散，风热散去之后自然就凉了。这就是本草书中所说的冰片性寒的含义，以前没有人阐明过这一点，特此记录于此）。
产于南番，据说是老杉树的树脂。以颜色白如冰、呈梅花片状者为优良（用杉木炭养护则不易消耗，现在的人多用樟脑升华打制来冒充）。
【樟脑】
具有宣通、开通孔窍、除湿的功效。
性味辛热，香气浓烈且善于走窜，能够在水中激发火势（放在水中火焰会更加旺盛）。
通关开窍，利导滞塞，除湿杀虫。
放入鞋中可以治疗香港脚（《集要》记载：与乌头研成粉末，用醋制成弹子大小的丸药，置于足心，用微火烘烤，出汗即为有效）。
熏染衣物箱柜，辟除疰气及虫害。
制作方法是将樟木切片，浸水煎煮而成。通过正确的升华方法打制，能混淆冰片。
[Borneol]
Also known as Longnao Xiang (Dragon Brain Fragrance).
Functions: Dispersing, unblocking orifices, and dissipating constrained fire.
Nature and Flavor: Acrid and warm. Its fragrance is pungent and penetrating, capable of dispersing pathogens. It first enters the Lung Meridian, then transmits to the Heart and Spleen Meridians, and penetrates into the bones. It unblocks all orifices and dissipates constrained fire.
Indications:
- Convulsions, epilepsy, and phlegm confusing the mind (Li Dongyuan stated: It is suitable for wind diseases located in the bone marrow. If the disease is in the blood vessels and muscles, it may instead draw wind into the bones, like oil penetrating flour).
- Red eyes and corneal opacity (Mixed with milk and applied to the eyes several times a day. Wang Jiezhai stated: Borneol is extremely acrid and hot. Used for eye application to extract fire pathogens. This follows the treatment principle of "dispersing constrained fire." People mistakenly consider it cold and use it frequently, leading to accumulated heat damaging the eyes. Hence the saying "eyes do not go blind unless treated with borneol," referring to this cause).
- Deafness and nasal obstruction (Nasal polyps fall off after application; these are all effects of unblocking orifices).
- Throat bi (obstruction) and tongue protrusion (Dissipating fire).
- Bone pain and toothache (Treating bone conditions).
- Sunken smallpox lesions (Guided by pig heart blood, taken with wine or Zicao Decoction [Arnebiae Radix et Rhizoma], to enter the Heart Meridian and promote eruption).
- Dystocia.
- Three parasites and five types of hemorrhoids (Wang Lun stated: People mistakenly think Borneol is cold, unaware that its acrid-dispersing nature is very strong, merely appearing cool. All aromatics belong to Yang; how could an extremely aromatic substance be cold? When I was young, I asked my uncle, Mr. Jianhou, about Ginger. He replied: Its body is hot but its function is cool. Generally, acrid substances are hot, but acrid-heat must be dispersed by acridity. Once wind-heat is dispersed, coolness remains. This is the meaning behind the Materia Medica stating Borneol is cold, which had never been clarified before. Recorded here).
Origin: Southern regions, said to be resin from old fir trees. The best quality is white as ice and shaped like plum blossom slices (Stored with fir charcoal to prevent loss; nowadays, many use sublimated camphor to adulterate it).
[Camphora]
Functions: Dispersing, unblocking orifices, and removing dampness.
Nature and Flavor: Acrid and hot, with a pungent and penetrating fragrance. It can generate fire within water (the flame intensifies when placed in water).
Actions: Unblocking passages, relieving stagnation, removing dampness, and killing parasites.
Usage: Placed in shoes to treat tinea pedis (Hong Kong foot). (*Jiyao* records: Mixed with Aconitum carmichaelii powder, formed into pills the size of a bean using vinegar, placed on the sole of the foot, and gently heated over a mild fire until sweating occurs, which indicates efficacy).
It also fumigates clothing and chests to repel infectious agents and insects.
Preparation: Made by slicing Camphor wood, soaking it in water, and decocting it. Properly sublimated, it can adulterate Borneol.