芫花为使，畏大黄、黄连、芦笋、藜芦、冷水，反牵牛。有用仁、用壳、用油，麸
炒、酣煮、烧末之异。布包压去油，谓之巴霜。新者佳。用之去皮及心。
辛，温，有毒。破症瘕结聚、痰癖留饮，除鬼毒蛊 ，平恶疮息肉；消十种水气，宣一
切
滞。荡涤五脏，扫清六腑，通利关窍，消除生冷。泻痢惊痫之疾，喉痹牙痛之 。通经坠胎
，破血排脓，祛风导气，消肿杀虫。解寒热之温疟，止心腹之急痛。乃斩关夺门之将，有健
脾开胃之能。
生巴郡山谷。八月采实。嘉州、眉州、戎州皆有之。木高一二丈，叶如樱桃而浓大，花
发成
似大枫子壳而脆薄，子及仁似海松子。
一切积滞，巴豆一两、蛤粉二两、黄柏二两，丸绿豆大，每五丸水下。（验方第一。）
食疟积疟，巴豆去心二钱、皂角二钱，丸豆大，每冷水下一丸。（第二。）
积滞泻痢，腹痛里急，巴豆、杏仁各四十九粒，去皮心烧末，熔蜡丸约绿豆大，每次三
钱，用大黄汤下之可也。（第
三。）
下血不止，以鸡子开孔，巴豆一粒入，煨熟，去豆分食之。（第四。）
夏日水泻不止，巴豆一粒，针头烧末，化蜡作一丸，倒流水下。（第五。）
小儿痰喘，巴豆一粒，杵烂，绵包塞鼻，男左女右，痰即下。（第六。）
点除黑痣，巴豆、锻石、人言等分，糯米少许，炒研点之。（第七。）
痈疽恶肉，炒焦研膏点之。（第八。）
以芫花作为使药，巴豆畏忌大黄、黄连、芦笋、藜芦和冷水，与牵牛子相反。使用巴豆有使用仁、使用壳、使用油的差异，也有麸炒、醋煮、烧成末的不同。用布包裹压榨去除油脂，称为巴霜。新鲜的巴豆品质较好。使用时需去掉外皮及芯。
味辛，性温，有毒。能破除症瘕结聚（腹内结块）、痰癖留饮（痰饮停聚），驱除鬼毒蛊毒，平复恶疮息肉；消除十种水气病，宣通一切气滞。荡涤五脏，扫清六腑，通利关窍，消除生冷积滞。治疗泻痢惊痫之疾，缓解喉痹牙痛之痛。具有通经坠胎、破血排脓、祛风导气、消肿杀虫的功效。解除寒热往来的温疟，止住心腹部的急痛。它是如斩关夺门般的猛将，具有健脾开胃的能力。
产于巴郡的山谷中。八月采集果实。嘉州、眉州、戎州都有出产。树木高一二丈，叶子像樱桃叶但更浓大，花朵开放后形状类似大枫子壳且脆薄，种子和仁类似海松子。
治疗一切积滞：巴豆一两、蛤粉二两、黄柏二两，制成绿豆大小的丸剂，每次用水送服五丸。（验方第一。）
治疗食疟、积疟：巴豆去芯二钱、皂角二钱，制成豆大小的丸剂，每次用冷水送服一丸。（第二方。）
治疗积滞泻痢、腹痛里急后重：巴豆、杏仁各四十九粒，去掉皮和芯烧成末，熔化蜡液制成约绿豆大小的丸剂，每次三钱，用大黄汤送服即可。（第三方。）
治疗下血不止：将鸡蛋开孔，放入一粒巴豆，煨熟后，去掉巴豆分次食用。（第四方。）
夏日水泻不止：巴豆一粒，针头大小烧成末，用蜡液化为一丸，用倒流水送服。（第五方。）
小儿痰喘：巴豆一粒，捣烂，用棉布包裹塞入鼻孔，男左女右，痰液即会排出。（第六方。）
With Yuanhua (Genkwa Flos) as the guiding herb, Badi Dou (Crotonis Fructus) is incompatible with Dahuang (Rhei Radix et Rhizoma), Huanglian (Coptidis Rhizoma), Lusun (Asparagi Racemus), Lilü (Veratri Radix), and cold water; it counteracts Qianniu (Pharbitidis Semen). There are variations in using the kernel, the shell, or the oil, as well as differences in processing methods such as stir-frying with bran, boiling in vinegar, or burning to ash. When wrapped in cloth and pressed to remove the oil, it is called Bashuang (Crotonis Fructus Oleum Expressum Residuum). Fresh ones are of superior quality. When used, the skin and core must be removed.
Pungent in flavor, warm in nature, and toxic. It breaks up zheng zha (abdominal masses) and accumulations, resolves phlegm-plethora and retained fluids, eliminates ghost toxins and gu poison, and calms malignant sores and polyps; it dissipates ten types of edema/qi-water conditions and unblocks all stagnations. It sweeps through the five zang organs, clears the six fu organs, opens the orifices and passages, and eliminates cold and raw food accumulations. It treats dysentery, diarrhea, convulsions, and epilepsy; relieves throat obstruction (hou bi) and toothache. It promotes menstruation and induces abortion, breaks blood stasis and expels pus, dispels wind and guides qi, reduces swelling, and kills parasites. It resolves warm malaria characterized by alternating chills and fever, and stops acute pain in the heart and abdomen. It acts as a general who breaches gates and passes barriers, possessing the ability to strengthen the spleen and open the stomach.
It grows in the valleys of Ba Commandery. The fruits are harvested in August. It is also found in Jia Prefecture, Mei Prefecture, and Rong Prefecture. The tree is one to two zhang high; the leaves resemble those of the cherry tree but are thicker and larger; the flowers, when blooming, resemble the shells of large maple seeds and are brittle and thin; the seeds and kernels resemble pine nuts.
For treating all types of stagnation: Use 1 liang of Badi Dou, 2 liang of Ge Fen (Concha Meretricis), and 2 liang of Huangbai (Phellodendri Cortex). Make pills the size of mung beans. Take 5 pills washed down with water. (Verified Formula No. 1.)
For treating food malaria and accumulation malaria: Use 2 qian of Badi Dou (core removed) and 2 qian of Zaojiao (Gleditsiae Sinensis Fructus). Make pills the size of beans. Take 1 pill washed down with cold water. (Formula No. 2.)
For treating stagnation-induced dysentery and diarrhea, abdominal pain with tenesmus: Use 49 grains each of Badi Dou and Xingren (Armeniacae Semen Amarum). Remove skins and cores, burn to ash, melt wax, and make pills roughly the size of mung beans. Take 3 qian each time, washed down with Dahuang decoction. (Formula No. 3.)
For treating persistent lower bleeding: Make a hole in an egg, insert one grain of Badi Dou, bake until cooked, remove the bean, and consume the egg in portions. (Formula No. 4.)
For persistent watery diarrhea in summer: Use one grain of Badi Dou, grind into powder using a needle-head amount, mix with melted wax to form one pill, and take with inverted-flowing water. (Formula No. 5.)
For pediatric phlegm-wheezing: Use one grain of Badi Dou, pound into a paste, wrap in cotton, and insert into the nostril (left for males, right for females); phlegm will drain out. (Formula No. 6.)
To remove black nevi: Mix equal parts of Badi Dou, Duanshi (Lapis Aluminis Ustus), and Renyan (Arsenici Trioxidum), add a small amount of Nuomi (Oryzae Sativum Glutinosa Semen), stir-fry, grind, and apply locally. (Formula No. 7.)
For carbuncles, ulcers, and foul flesh: Stir-fry until charred, grind into a paste, and apply locally. (Formula No. 8.)