龙骨，味甘，气微寒，阳也。虽有雌雄，无分功效，但色黑者不可用。必须火 研末，
水飞
过，始可用之。闭塞滑泻之大肠，收敛浮越之正气，止肠风下血，及妇人带下崩中，塞梦寐
泄精，并小儿惊痫风热，辟鬼疰精物，除肠痈内疽，固虚汗，缩小便，散坚结，消症瘕。
龙齿，定心安魂，男妇邪梦纷纭者，尤宜急服。
紫稍花，乃龙精而沾于水草而成者，世无真物，真则兴阳。
或问龙善变化，何以山中往往有龙骨，任人取携，血骨淋漓，绝不见有风云雷雨之生，
龙不
蠢然一物乎？曰∶君误认龙骨为真乎。世间所用之龙骨，乃地气结成，非天上行雨之龙也。
夫神龙见尾而不见首，首且不使人见，岂有骸听人之采取乎。惟龙骨乃地气所结，不能变化
，所以取之而无碍耳。
或又问龙骨既为地气所结，宜得地气之深，性当属阴，而不当属阳矣，何龙齿安魂而不
安魄
耶？曰∶虎属阴，而龙属阳，龙为火，而虎为金，不易之道也。龙生于地下，宜为阴，则虎
生于地上，亦可为阳乎。万物皆生于天地之中，无阴则阳不生，无阳则阴不长。虎生于地上
，未尝不得阳之气。龙生于地下，亦未尝不得阴之气也。然而虎得阳而生，而虎终不可谓阳
之精；龙得阴而生，而龙终不可谓阴之精也。夫阳气者，生气也；阴气者，杀气也。生气属
木，而人身之肝气应之；杀气属金，而人身之肺气应之。肺中藏魄，肝中藏魂。魂动，似宜
用虎睛以相制；魄飞，似宜用龙齿以相伏。何以用虎睛
制魂而魂愈动，用龙齿制魄而魄愈飞也。盖魂动者，阳气动也，以阳引阳而魂始归；魄飞者
，阴气飞也，以魄招魄而魄始降。龙齿正得阳气，故能安魂。虎睛正得阴气，故能镇魄。谁
谓龙骨生于地，即属阴物哉。
或问龙骨制法，古人有用黑豆煮汁以泡之者，或用酒浸一宿而用之者，或用香草汤洗过，
捣
粉，绢袋盛之，入于燕子腹中，悬井上一宿而用之者，或用醋淬而研末用者，毕竟何法制最
佳？曰∶皆可用也。用燕子制者最神。盖燕子为龙之所喜，龙得燕而动。龙骨遇燕子，自然
流动，而无过涩留肠之害矣。
龙骨，味道甘甜，性质微寒，属性为阳。虽然分为雌雄两种，但功效没有区别，只是颜色发黑的不能使用。必须经过火煅后研磨成粉末，再用水飞法处理过，才可以服用。它能闭塞滑泻的大肠，收敛浮越的正气，止住肠风下血，以及妇女的带下病和崩漏，固摄睡梦中遗精，并治疗小儿惊痫和风热，驱避鬼疰等邪祟，消除肠痈和内疽，固摄虚汗，缩小便，消散坚结，消除症瘕积聚。
龙齿，能定心安魂，对于男女出现怪异梦境、心神不宁的情况，尤其适宜急服。
紫稍花，是龙的精气沾染水草而形成的，世间没有真正的紫稍花，如果是真的，具有兴阳的功效。
有人问：龙善于变化，为什么山中往往有龙骨，任人取走携带，只见血肉骨骼淋漓，却绝不见风云雷雨的产生，难道龙不是蠢笨的一物吗？回答说：您误以为龙骨是真龙遗留的吗？世间所用的龙骨，是地气凝结而成的，并不是天上行雨的真龙。神龙只露尾巴而不露头，连头都不让人看见，怎么会有骸骨任凭人采取呢？只有龙骨是地气所结，不能变化，所以取用它没有任何妨碍。
又有人问：既然龙骨是地气所结，应该深得地气的深重，性质应当属于阴，而不应当属于阳了，为什么龙齿能安魂而不能安魄呢？回答说：虎属于阴，龙属于阳，龙属火，虎属金，这是不可改变的道理。龙生于地下，如果算作阴，那么虎生于地上，也可以算作阳吗？万物都生于天地之间，没有阴则阳不能生，没有阳则阴不能长。虎生于地上，未尝不得到阳气。龙生于地下，也未尝不得到阴气。然而虎得到阳气而生，但不能说虎是阳的精粹；龙得到阴气而生，也不能说龙是阴的精粹。阳气，是生气；阴气，是杀气。生气属于木，与人身体的肝气相应；杀气属于金，与人身体的肺气相应。肺中藏魄，肝中藏魂。魂动，似乎适宜用虎睛来制约；魄飞，似乎适宜用龙齿来降伏。为什么用虎睛制魂反而魂更动，用龙齿制魄反而魄更飞呢？大概魂动，是阳气在动，以阳引阳，魂才能回归；魄飞，是阴气在飞，以魄招魄，魄才能下降。龙齿正得阳气，所以能安魂。虎睛正得阴气，所以能镇魄。谁说龙骨生于地下，就属于阴物呢？
有人问龙骨的炮制方法，古人有用黑豆煮汁浸泡的，或用酒浸泡一夜后使用的，或用香草汤洗过后，捣成粉，用绢袋装好，放入燕子腹中，悬挂在井上过夜后使用的，或用醋淬炼后研末使用的，究竟哪种方法最好？回答说：都可以使用。用燕子炮制的效果最神奇。因为燕子是龙所喜欢的，龙遇到燕子就会活动。龙骨遇到燕子，自然流动，就不会有过于涩滞留滞在肠道的危害了。
Longgu (Fossilized Bones), sweet in taste, slightly cold in nature, and belonging to Yang. Although divided into male and female varieties, their therapeutic effects are identical; however, those with a black color should not be used. It must be calcined by fire, ground into powder, and then subjected to water levigation before it can be employed. It binds the large intestine prone to obstruction and slippery diarrhea, consolidates floating and dispersing Zheng Qi (Upright Qi), stops intestinal wind bleeding, as well as leukorrhea and metrorrhagia in women, secures seminal emission during dreams, treats infantile convulsions and wind-heat, expels Gui Zhu (ghostly affections) and evil spirits, eliminates intestinal abscesses and internal ulcers, consolidates deficiency sweating, reduces urination, dissipates hard accumulations, and resolves zheng jia (masses).
Longchi (Dragon Teeth), calms the mind and anchors the Hun (Ethereal Soul); it is especially suitable for urgent use in cases of men and women suffering from chaotic and strange dreams.
Zishao Hua (Purple Stamen Flower), formed from the essence of dragons adhering to aquatic plants, does not exist authentically in the world; if authentic, it would promote Yang energy.
One might ask: Dragons are adept at transformation; why are dragon bones often found in mountains, freely taken and carried away, with blood and bones dripping, yet never accompanied by wind, clouds, rain, or thunder? Are dragons not merely inert objects? The answer is: You mistakenly believe these are bones of true dragons. The dragon bones used in the world are congealed from Earth Qi, not from dragons that bring rain in the heavens. The divine dragon reveals its tail but not its head; since even the head is hidden from human sight, how could its skeletal remains be left for people to collect? Only Longgu is congealed from Earth Qi and lacks the ability to transform, which is why collecting it causes no hindrance.
Another might ask: Since Longgu is congealed from Earth Qi, it should deeply possess the nature of Earth, implying its property should belong to Yin rather than Yang. Why does Longchi anchor the Hun but not the Po (Corporeal Soul)? The response is: Tigers belong to Yin, while Dragons belong to Yang; Dragons correspond to Fire, and Tigers to Metal; this is an unchangeable principle. If Dragons born underground are considered Yin, can Tigers born on the surface be considered Yang? All things are born within Heaven and Earth; without Yin, Yang cannot arise; without Yang, Yin cannot grow. Tigers born on the surface do receive Yang Qi. Dragons born underground also receive Yin Qi. However, although Tigers are born through Yang, they cannot be called the essence of Yang; although Dragons are born through Yin, they cannot be called the essence of Yin. Yang Qi is Sheng Qi (Vitalizing Qi); Yin Qi is Sha Qi (Killing Qi). Vitalizing Qi corresponds to Wood and resonates with the Liver Qi in the human body; Killing Qi corresponds to Metal and resonates with the Lung Qi. The Po resides in the Lungs, and the Hun resides in the Liver. When the Hun moves, it seems appropriate to use Tiger Eyes to restrain it; when the Po flies, it seems appropriate to use Dragon Teeth to subdue it. Why does using Tiger Eyes to restrain the Hun make the Hun move more, and using Dragon Teeth to restrain the Po make the Po fly more? Essentially, when the Hun moves, it is due to the movement of Yang Qi; attracting Yang with Yang allows the Hun to return. When the Po flies, it is due to the flight of Yin Qi; attracting Po with Po allows the Po to descend. Dragon Teeth obtain Yang Qi, thus they can calm the Hun. Tiger Eyes obtain Yin Qi, thus they can suppress the Po. Who says that because Longgu is born underground, it belongs to Yin substances?
One may ask about the processing methods of Longgu. Ancients used soaking in decoction of black beans, soaking in wine overnight, washing with herbal soup, grinding into powder, placing in silk bags inside swallows' bellies, hanging over a well overnight, or quenching with vinegar before grinding. Which method is best? The answer is: All methods are usable. The method using swallows is the most efficacious. This is because swallows are favored by dragons, and dragons become active upon encountering swallows. When Longgu encounters swallows, it naturally becomes fluid, avoiding the harm of excessive astringency and retention in the intestines.