（和蒜食少热。同沙糖食生疳虫。同芥菜食成肿疾。同猪肝鸡肉雉肉鹿肉猴肉食生痈疽
。同麦门冬食害人。）
【气味】
甘温无毒。
【主治】
合五味煮食主虚羸。温中下气。止下痢肠痔（夏月热痢有益。冬月不宜。）合 作羹
主胃弱不下食。调中益五脏。合茭首作羹。主丹石发热。生捣涂恶核肿毒不散及 疮。同小
豆捣涂丹毒。烧灰和酱汁涂诸疮十年不瘥者。以猪脂煎灰服治肠痈。合小豆煮汁服消水肿。
炙油涂妇人阴疳诸疮杀虫止痛。酿白矾烧研饮服治肠风血痢。酿硫黄 研酿五倍子 研酒服
并治下血。酿茗叶煨服治消渴。酿胡蒜煨研饮服治膈气。酿绿矾 研饮服治反胃。酿盐花烧
研掺齿痛。酿当归烧研揩牙乌髭止血。酿砒烧研治急疳疮。酿白盐煨研搽骨疽。酿附子炙焦
同油涂头疮白秃。凡诸鱼属火。独鲫属土。有调胃实肠之功。若多食亦能动火。
（最能泻人。新者佳。用之去皮心膜熬令黄黑。捣如膏。乃和丸散。有用仁者。用壳者
。用油者。有生用者。麸炒者。醋煮者。烧存性者。有研烂以纸包压去油者。谓之巴豆霜。
）
【气味】
辛温有毒。又曰生温熟寒。有大毒。其性热味苦。气薄味浓。体重而沉降阴也。又
性热味辛有大毒。浮也。阳中阳也。又生猛熟缓。能吐能下。能止能行。可升可降。
【主治】
伤寒温疟寒热。破症瘕结聚。坚积留饮。痰癖大腹。荡练五脏六腑。开通闭塞。利
水谷道。去恶肉。除鬼毒蛊主邪物。杀虫鱼。金疮脓血不利丈夫。杀斑蜇蛇虺毒。治十种水
肿痿痹。落胎。通宣一切病。泄壅滞。除风破血。排脓消肿毒。杀腹脏虫。及疥癞疔肿。治
泻痢惊痫。心腹痛疝气。风 耳聋。喉痹牙痛。利关窍。古人云。巴豆乃斩关夺门之将。不
可轻用。若峻用则有戡乱劫病之功。微用亦有抚缓调中之妙。譬之萧曹绛灌。乃勇猛武夫。
而用之为相。亦能辅治太平。王海藏言其可以通肠。可以止泻。此发千古之秘也。
（与大蒜同食，食欲减退且易生内热。与砂糖同食，会诱发疳虫。与芥菜同食，会导致肿疾。与猪肝、鸡肉、野鸡、鹿肉、猴肉同食，会引发痈疽。与麦门冬同食，有害于人。）
【气味】
味甘，性温，无毒。
【主治】
与五味子同煮食用，主治身体虚弱消瘦。能温中降气，止住下痢和肠痔（夏季的热痢有益，冬季不宜服用）。做成羹汤食用，主治胃弱导致的食欲不振。能调和脾胃，补益五脏。与茭白首尾（指茭白的嫩茎）做成羹汤，主治因服用丹石类药物引起的发热。新鲜捣碎外涂，主治恶核肿毒不散以及疮疡。与小豆一起捣碎外涂，主治丹毒。烧成灰后混合酱汁外涂，可治疗十年不愈的各种疮疡。用猪脂煎煮巴豆灰服用，可治疗肠痈。与小豆同煮取汁服用，可消除水肿。炙烤出油后涂抹于妇女阴部疳疮，可杀虫止痛。将白矾酿入巴豆中烧研后饮水送服，可治疗肠风血痢。将硫黄或五倍子酿入巴豆中，用酒送服，均可治疗便血。将茶叶酿入巴豆中煨熟后服用，可治疗消渴症。将大蒜酿入巴豆中煨熟研末，饮水送服，可治疗膈气。将绿矾酿入巴豆中研末饮水送服，可治疗反胃。将盐花酿入巴豆中烧研后掺敷牙齿，可治疗牙痛。将当归酿入巴豆中烧研后揩牙，可使胡须变黑并止血。将砒霜酿入巴豆中烧研，可治疗急性的疳疮。将白盐酿入巴豆中煨熟研末搽抹，可治疗骨疽。将附子酿入巴豆中炙焦后同油涂抹头部，可治疗头疮和白秃癣。大凡各种鱼类属性为火，唯独鲫鱼属性为土，具有调理脾胃、充实肠道的作用。但如果多吃也会助长内火。
（巴豆最能泻下。新鲜的为佳。使用时需去皮、去心及内膜，熬至黄黑色，捣成膏状，然后配合制成丸剂或散剂。有的只用仁，有的用壳，有的用油，有生用的，有麸炒的，有醋煮的，有烧存性的，也有研烂后用纸包裹压去油脂的，称为巴豆霜。）
【气味】
味辛，性温，有毒。又说生者性温，熟者性寒。有大毒。其性质热，味道苦，气薄味浓，体重而沉降，属阴。又说其性热味辛，有大毒，性浮，属阳中之阳。又说生用猛烈，熟用缓和，能催吐也能泻下，能止泻也能行气，可升可降。
【主治】
治疗伤寒、温疟引起的寒热往来。破除癥瘕积聚，坚硬积滞和留饮，痰癖引起的大腹肿胀。荡涤五脏六腑，开通闭塞，利水谷之道，去除恶肉，驱除鬼毒蛊邪等致病物。杀虫鱼。治疗金疮脓血不利。丈夫使用可杀灭斑蝥、蜇蛇、虺蛇之毒。治疗十种水肿、痿痹。堕胎。通宣一切疾病，泄除壅滞，祛风破血，排脓消肿毒。杀灭腹脏寄生虫。以及疥癣、癞病、疔疮肿痛。治疗泻痢、惊痫、心腹痛、疝气、风聋、喉痹、牙痛。利通关窍。古人说，巴豆是斩关夺门的猛将，不可轻率使用。如果峻烈使用，则有平定祸乱、劫除病邪的功效；轻微使用，也有安抚缓和、调理中焦的妙处。好比萧何、曹参、周勃、灌婴这些勇猛的武将，任用他们做宰相，也能辅助治理太平盛世。王海藏说它可以通肠，也可以止泻，这是揭开了千古的秘密。
(When eaten with garlic, appetite decreases and internal heat is generated. When eaten with rock sugar, it induces pinworms (intestinal parasites). When eaten with mustard greens, it causes swelling diseases. When eaten with pig liver, chicken meat, pheasant meat, deer meat, or monkey meat, it generates carbuncles and sores. When eaten with Ophiopogon tuber, it harms the human body.)
[Flavor and Properties]
Sweet in flavor, warm in nature, non-toxic.
[Indications]
Boiled and eaten with Schisandra berry, it treats emaciation due to deficiency. It warms the middle jiao and directs rebellious qi downward, stopping dysentery and hemorrhoids (beneficial for summer-heat dysentery, not suitable for winter). Made into a soup, it treats poor appetite due to weak stomach function. It harmonizes the middle and nourishes the five zang organs. Made into a soup with wild rice stem, it treats fever caused by taking mineral drugs (danshi). Freshly crushed and applied externally, it treats indurated swellings and toxic sores that do not resolve. Crushed together with adzuki beans and applied externally, it treats erysipelas. Burned to ash and mixed with soy sauce, applied externally, it treats various chronic sores that have not healed for ten years. Fried in lard and taken orally, the ash treats intestinal abscesses. Boiled with adzuki beans and the juice taken orally, it reduces edema. Roasted to extract oil and applied to female genital gangrenous sores, it kills parasites and relieves pain. Infused with alum, burned, ground, and taken with water, it treats intestinal wind bloody dysentery. Infused with sulfur or Chinese gallnut, ground, and taken with wine, both treat lower gastrointestinal bleeding. Infused with tea leaves, roasted and taken, it treats diabetes mellitus (xiao ke). Infused with garlic, roasted, ground, and taken with water, it treats diaphragmatic qi stagnation. Infused with green vitriol, ground, and taken with water, it treats retrograde vomiting. Infused with salt crystals, burned, ground, and sprinkled on teeth, it treats toothache. Infused with Angelica sinensis root, burned, ground, and used to rub teeth, it darkens facial hair and stops bleeding. Infused with realgar, burned, and ground, it treats acute gangrenous sores. Infused with white salt, roasted, ground, and applied, it treats bone abscesses. Infused with Aconite lateral root, roasted until charred, and mixed with oil, applied to the head, it treats scalp sores and tinea capitis. Generally, all fish belong to fire, but carp alone belongs to earth, possessing the function of regulating the stomach and solidifying the intestines. However, excessive consumption can also stir up internal fire.
(It is the most potent purgative. Fresh ones are best. When used, remove the skin, heart, and membrane, roast until yellow-black, grind into a paste, then combine to form pills or powders. Some use only the kernel, some use the shell, some use the oil, some use raw, some bran-fried, some vinegar-boiled, some carbonized retaining their properties, and some ground fine and pressed between paper to remove the oil, known as Croton seed frost.)
[Flavor and Properties]
Pungent in flavor, warm in nature, toxic. It is also said that raw is warm and cooked is cold. It has great toxicity. Its nature is hot and its flavor is bitter; its qi is thin and its flavor is strong, heavy in weight and sinking, belonging to yin. It is also said that its nature is hot and pungent with great toxicity, floating, belonging to yang within yang. Raw usage is fierce, while cooked usage is mild; it can induce vomiting and purging, stop diarrhea and promote movement, ascend and descend.
[Indications]
Treats cold damage and warm malaria with alternating chills and fever. Breaks up masses and accumulations, hard stagnations, and retained fluids. Treats phlegm-rheum causing abdominal distension. Cleanses the five zang and six fu organs, opens blockages, promotes the flow of water and grain passages, removes foul flesh, eliminates ghost toxins and蛊 (poisonous substances), and kills parasites. Treats traumatic injuries with pus and blood obstruction. In men, it kills blister beetles and snake venom (from cobras and vipers). Treats ten types of edema and flaccidity/obstruction syndromes. Induces abortion. Unblocks and diffuses all diseases, drains stagnation, dispels wind and breaks blood stasis, expels pus and reduces toxic swelling. Kills intestinal worms. Treats scabies, leprosy, carbuncles, and swollen sores. Treats dysentery, convulsions, epilepsy, heart and abdominal pain, hernia, wind-induced deafness, throat bi, and toothache. Opens the orifices. Ancients said: Croton seed is a general who breaches gates and seizes doors; it must not be used lightly. If used aggressively, it has the merit of quelling chaos and seizing disease; if used mildly, it has the subtlety of soothing and regulating the middle. It is like Xiao He, Cao Shen, Zhou Bo, and Guan Ying—brave martial heroes—who, when appointed as chancellors, can assist in governing a peaceful era. Wang Haizang stated that it can unblock the intestines and also stop diarrhea; this reveals a secret of millennia.