涩平无毒。 赤，醋淬七次，水飞用。形如笔架，重数两外，光泽如瓷，碎之其
理如石，内如龙骨，舐之粘舌者真。亦有微黑，而 之色如翡翠者为苍龙齿，较白者更胜。
其小如笋尖，或如指状者，海鳅齿及骨也。丛生如贯众根者，海马齿也。舐之亦能粘舌，世
多以等类伪充，不可不辨。
《本经》主杀精物，大人惊痫诸痉，癫疾狂走，心下结气，不能喘息，小儿五惊十二痫。
发明 龙者东方之神，故骨与齿皆主肝病。许叔微云∶肝藏魂能变化，故游魂不定者，
治之以龙齿。古方有远志丸、龙齿清魂散、平补镇心丸皆取收摄肝气之剂也。又龙骨以白者
为上，取固上气以摄下脱。齿以苍者为优。生则微黑， 之翡翠可爱，较白者功用更捷。产
后血晕为要药，取其直入肝脏也。予闻神龙蜕骨之说，初未之信，及从药肆选觅龙齿，见其
骨有变化未全者，半与牛骨无异，始知宇宙之大无所不有。即如蛇虫之属，皆能脱形化体，
岂特云龙风虎而已哉。龙禀东方纯阳之气，故能兴云致雨，东方木气主乎生也，其耳独不司
听者，阳神别走于角也。春夏发现而秋冬潜伏者，随阳气之鼓舞也。虎禀西方阴暴之性，故
啸则生风，西方金令主乎杀也，其项独不能仰者，阴威并振予尾也，昼潜伏而宵奋迅者，乘
阴气之炎威也。以是惟之，则虎骨能搜风气，健筋骨、疗疼肿，睛能定人魄。魄者，阴之精
也。龙骨能涩精气，收神识，止滑脱。齿能清人魂，魂者，阳之神也。然龙性飞腾而骨独粘
者，正以其滞而欲蜕之，如得飞冲御天，非飞冲后而蜕其骨也。观《本经》惊痫癫疾结气，
甄权镇心安魂魄等治，总皆入肝敛魂，用以疗阳神之脱，同气相求之妙。许叔微云∶肝藏魂
能变化，故魂游不定者，治之以龙齿。时珍曰∶龙者东方之神，故其骨与齿皆主肝病。
涩，平，无毒。用醋淬七次，再水飞后使用。形状像笔架，重量达数两以上，光泽像瓷器一样，敲碎后纹理像石头，内部像龙骨，舔舐时粘舌的是真品。也有颜色微黑，但断面颜色如翡翠的，这是苍龙齿，比白色的更胜一筹。那些小如笋尖，或像手指形状的，是海鳅的牙齿和骨头。丛生像贯众根一样的，是海马的牙齿。舔舐也能粘舌，世人常以此类伪充真品，不可不辨别。
《神农本草经》主治杀精物（指能伤害人体精气的邪祟），大人惊痫及各种痉病，癫疾狂走，心下结气，不能喘息，小儿五惊十二痫。
发明：龙是东方之神，所以龙的骨与齿都主治肝病。许叔微说：肝藏魂，具有变化功能，所以神魂游移不定的人，用龙齿治疗。古方中有远志丸、龙齿清魂散、平补镇心丸，都是取用收敛肝气的方剂。另外，龙骨以白色为上品，取其固摄上气以制止下脱。龙齿以青色为优。生龙齿颜色微黑，断面如翡翠般可爱，比白色的功效更快捷。产后血晕是龙齿的要药，因为它能直入肝脏。我听说神龙蜕骨的传说，起初并不相信，后来从药店挑选寻找龙齿时，看到其中骨骼有变化未完全的，有一半与牛骨无异，这才知道宇宙之大无所不有。就像蛇虫之类，都能脱形化体，岂止是云龙风虎而已呢？龙禀受东方纯阳之气，所以能兴云致雨，东方木气主生发，它的耳朵唯独不司听觉，是因为阳神别走于角（鹿角）。春夏出现而秋冬潜伏，是随着阳气的鼓舞。虎禀受西方阴暴之性，所以咆哮则生风，西方金令主肃杀，它的脖子唯独不能仰起，是因为阴威并振于尾。白天潜伏而夜晚奋迅，是乘着阴气的炎威。由此推论，虎骨能搜风气，强健筋骨，治疗疼肿，虎睛能安定人的魄。魄，是阴的精气。龙骨能涩精气，收神识，止滑脱。龙齿能清人魂，魂，是阳的神明。然而龙性飞腾，而其骨却独独粘滞，正是因为它停滞而想要蜕变，如同得到飞冲御天的能力，不是飞冲之后才蜕去其骨。看《本经》中关于惊痫癫疾结气的记载，甄权关于镇心安魂魄等治疗，总归都是入肝敛魂，用来治疗阳神的脱失，这是同气相求的妙处。许叔微说：肝藏魂，具有变化功能，所以神魂游移不定的人，用龙齿治疗。李时珍说：龙是东方之神，所以它的骨与齿都主治肝病。
Astringent, neutral, non-toxic. Quench in vinegar seven times, then use after water-trituration. The shape resembles a pen holder, weighing several taels externally, with luster like porcelain; when broken, its texture resembles stone, and the interior resembles Longgu (Fossilized Bones). Those that stick to the tongue are authentic. There are also those slightly black in color but with a fracture surface resembling jadeite; these are Canglongchi (Green Dragon Teeth), which are superior to the white variety. Those small as bamboo shoots or finger-shaped are the teeth and bones of sea eels. Those growing in clusters resembling the roots of Cyathulae Radix (Guanzhong) are Hippocampi Teeth. They also stick to the tongue; the world often uses such items to counterfeit genuine ones, so one must not fail to distinguish them.
The *Shennong Bencao Jing* states it treats "killing spirit entities" (pathogenic factors harming essence), adult jingxian (convulsive disorders with fright) and various spasm diseases, dianji (epilepsy/mania) with wild running, stagnation of qi in the epigastrium, inability to breathe, and pediatric wujing (five types of fright) and shierxian (twelve types of epilepsy).
Invention: The Dragon is the deity of the East; therefore, both its bone and teeth primarily treat Liver diseases. Xu Shuwei stated: "The Liver stores Hun (Ethereal Soul) and possesses transformative power; thus, for those whose wandering Hun is unsettled, treat with Longchi (Dragon Teeth)." Ancient formulas include Yuanzhi Wan (Polygalae Pill), Longchi Qinghun San (Dragon Teeth Clearing Soul Powder), and Pingbu Zhenxin Wan (Neutralizing and Calming Heart Pill); all utilize agents that gather and restrain Liver Qi. Furthermore, Longgu (Fossilized Bones) is best when white, utilizing its ability to secure upper Qi to arrest lower collapse. Longchi (Dragon Teeth) is superior when greenish/cyan. Raw Longchi is slightly black, with a jade-like fracture surface, and its efficacy is more rapid than the white variety. It is a crucial herb for postpartum blood fainting because it directly enters the Liver channel. I had heard the legend of the Divine Dragon shedding its bones but initially did not believe it. Later, while selecting Longchi from a pharmacy, I saw bones that were incompletely transformed, half of which were indistinguishable from cattle bones. Only then did I realize that the universe is vast and contains everything. Just as snakes and insects can shed their forms and transform their bodies, how could it be limited to Cloud Dragons, Wind Tigers, etc.? The Dragon inherits pure Yang Qi of the East, hence it can raise clouds and bring rain. The Wood Qi of the East governs growth; its ears alone do not govern hearing because the Yang Spirit travels separately to the horns. It appears in spring and summer and hides in autumn and winter, following the encouragement of Yang Qi. The Tiger inherits the Yin-violent nature of the West; hence, its roar generates wind. The Metal Command of the West governs killing/destruction; its neck alone cannot look up because Yin majesty vibrates through its tail. It hides by day and acts swiftly by night, riding the fierce momentum of Yin Qi. From this reasoning, Hu Gu (Tiger Bone) can search out Wind pathogen, strengthen sinews and bones, and treat pain and swelling; Hu Jing (Tiger Eye) can stabilize human Po (Corporeal Soul). Po is the essence of Yin. Longgu can astringe Essence and Qi, gather Shen (Spirit), and stop sliding/collapse. Longchi can clear Human Hun; Hun is the Spirit of Yang. However, although the Dragon's nature is to fly and soar, its bone is uniquely sticky/adherent; this is precisely because it is stagnant and desires to shed. Like obtaining the power to fly through the heavens, it is not that it sheds its bone only after flying. Observing the treatments in the *Bencao Jing* regarding jingxian, dianji, and stagnation of qi, and Zhen Quan's treatments for calming the heart and stabilizing Hun and Po, they all essentially enter the Liver to gather Hun, used to treat the escape of Yang Spirit. This is the wonder of "similar energies seeking each other." Xu Shuwei said: "The Liver stores Hun and possesses transformative power; thus, for those whose Hun wanders unsettled, treat with Longchi." Li Shizhen said: "The Dragon is the deity of the East; therefore, its bone and teeth both primarily treat Liver diseases."