〔时珍曰〕凡用以齑水煮二十沸，入冷水中，揉扯数十次，晒干用。
〔颂曰〕乳性至粘难碾。用时以缯袋挂于窗隙间，良久取研，乃不粘也。〔大明曰〕入
丸散，
或言
热水
源
修治同乳香。
〔 曰〕凡使先研作粉，筛过入丸散中用。若同众药捣，则化作尘飞也。
〔恭曰〕龙脑香合糯米炭、相思子贮之，则不耗。〔时珍曰〕或言以鸡毛、相思子同入
小瓷
辨也
〔时珍曰〕凡用，每一两以二碗合住，湿纸糊口，文武火 之。半时许取出，冷定用。
又法∶每一两，用黄连、薄荷六钱，白芷、细辛四钱、荆芥、密蒙花二钱，当归、槐花一钱。
以
待水干取开，其脑自升于上。以翎扫下，形似松脂，可入风热眼药。人亦多以乱片脑，不可
不辨。
〔 曰〕凡使柏皮，削去粗皮，用生蜜水浸半日，漉出晒干，用蜜涂，文武火炙，令蜜
尽为度。每五两，用蜜三两。〔元素曰〕二制治上焦，单制治中焦，不制治下焦也。
〔时珍曰〕
蜜制则治中。
〔 曰〕凡使要紫色味辛者为好，刮去粗皮。入丸散，每一斤用酥四两炙熟用。若入汤
饮，用自然姜汁八两炙尽为度。〔大明曰〕凡入药去粗皮，用姜汁炙，或浸炒用。
〔宗 曰〕味
〔李时珍说〕凡是用来制作药用的，用醋汤煮二十次沸腾后，放入冷水中，揉搓拉扯数十次，晒干后使用。
〔苏颂说〕乳香性质非常粘稠，难以研磨。使用时用丝袋挂在窗户缝隙间，过很长时间再取出研磨，就不会粘住了。〔孟诜说〕用于丸剂和散剂中，有人说用热水……（原文此处有缺漏）
炮制方法同乳香。
〔某医家说〕凡是使用的，先研磨成粉，筛过后加入丸剂和散剂中使用。如果与众药一起捣碎，就会化作灰尘飞散。
〔甄权说〕龙脑香与糯米炭、相思子一起贮存，就不会损耗。〔李时珍说〕有人说用鸡毛、相思子一同放入小瓷罐中辨别真伪。
〔李时珍说〕凡是使用冰片，每一两用两个碗扣住，用湿纸糊住口，用文火和武火交替加热半个时辰左右取出，冷却后使用。另一种方法：每一两冰片，用黄连、薄荷六钱，白芷、细辛四钱，荆芥、密蒙花二钱，当归、槐花一钱。以水煎煮至水干后取开，冰片自然升华到上面。用羽毛扫下来，形状像松脂，可用于治疗风热眼病。人们也常把乱制的冰片混入其中，不可不加以辨别。
〔某医家说〕凡是使用黄柏皮，削去粗皮，用生蜜水浸泡半天，滤出晒干，涂蜂蜜，用文火和武火炙烤，直到蜂蜜完全被吸收为止。每五两黄柏，用蜜三两。〔张元素说〕两种炮制方法治上焦，单一炮制方法治中焦，不炮制治下焦。〔李时珍说〕蜜制则治中焦。
〔某医家说〕凡是使用的要选紫色且味辛的为佳品，刮去粗皮。用于丸剂和散剂，每一斤用酥油四两炙熟后使用。如果用于汤饮，用自然姜汁八两炙烤至尽为止。〔孟诜说〕凡是入药去掉粗皮，用姜汁炙烤，或浸泡后炒制使用。〔陈承说〕味道……
[Li Shizhen stated] For medicinal use, boil in vinegar broth for twenty boiling cycles, immerse in cold water, knead and pull dozens of times, then dry in the sun for use.
[Su Song stated] Ru Xiang (Frankincense) has a highly viscous nature and is difficult to grind. When using it, hang it in a silk bag at a window crevice for a long time before grinding; this prevents stickiness. [Meng Shen stated] For use in Wan pills (Pellets) and San powders, some say to use hot water... (text missing here).
The processing method is the same as that of Ru Xiang (Frankincense).
[An unnamed physician stated] For use, first grind into powder, sieve it, and add it to Wan pills or San powders. If pounded together with other herbs, it will turn into dust and fly away.
[Zhen Quan stated] Long Nao Xiang (Borneol), when stored with Nuomi Tan (Rice Charcoal) and Xiangsi Zi (Abrus Precatorius seeds), will not be consumed or lost. [Li Shizhen stated] Some say to put chicken feathers and Xiangsi Zi (Abrus Precatorius seeds) together into a small porcelain jar to distinguish authenticity.
[Li Shizhen stated] For use, take one tael of Borneol, cover with two bowls, seal the mouth with wet paper, and heat with alternating Wen fire (mild heat) and Wu fire (strong heat) for about half an hour. Remove and let cool completely before use. Another method: For every one tael of Borneol, use Huang Lian (Coptis Rhizome) and Bo He (Menthae Haplocalycis Herba) 6 qian, Bai Zhi (Angelicae Dahuricae Radix) and Xi Xin (Asari Radix et Rhizoma) 4 qian, Jing Jie (Schizonepetae Spica) and Mi Meng Hua (Glochidion Flower) 2 qian, Dang Gui (Angelicae Sinensis Radix) and Huai Hua (Sophorae Flos) 1 qian. Boil until the water dries up, then open; the Borneol will naturally sublimate to the top. Sweep it down with a feather; its shape resembles pine resin, suitable for eye medicines treating Wind-Heat. People often mix counterfeit Borneol, so distinction is essential.
[An unnamed physician stated] For use with Bo Pi (Phellodendri Cortex), scrape off the rough bark, soak in raw honey water for half a day, drain and dry, coat with honey, and roast with alternating Wen fire and Wu fire until the honey is fully absorbed. For every five taels of Bo Pi, use three taels of honey. [Zhang Yuansu stated] The dual processing methods treat the Upper Jiao (Upper Burner); single processing treats the Middle Jiao (Middle Burner); unprocessed treats the Lower Jiao (Lower Burner). [Li Shizhen stated] Honey-processing targets the Middle Jiao.
[An unnamed physician stated] For use, select those that are purple and pungent in taste as superior; scrape off the rough bark. For use in Wan pills and San powders, for every one jin, use four taels of Su You (Butter/Ghee), roast until cooked. If used in Decoctions, use eight taels of natural Ginger Juice, roast until fully absorbed. [Meng Shen stated] For medicinal use, remove the rough bark, roast with Ginger Juice, or soak and stir-fry. [Chen Cheng stated] The taste...
[An unnamed physician stated] For use, scrape off the rough bark. For every one jin, use one tael of Su You (Butter/Ghee) and three taels of honey, mix and coat, then roast over fire until fully absorbed. Finely chop before use.