去头子、双叶，水浸干用。恶黄 、野狼毒、山茱萸，忌生菜、狸肉，畏硝石、滑
石，反藜芦。
辛，温，无毒，性升。入足厥阴、少阴。去头风而止嗽，疗齿痛而通气，驱寒湿而荡浊，
消
水饮而破痰。除癫痫之风疾，解痹痛之风湿，调百节之拘挛，且润大便之燥结。息风目泪淋
，兼治睫倒，通 鼻气塞，亦解耳聋。不可过用。
凡使勿用杜衡。柔茎细根，直而色紫，味极辛者，细辛也。茎微粗，根曲而黄白色，味
亦辛
者，杜衡也。根同细辛，色如杜衡，味辛微苦者，鬼督邮也。处处有之，以华阴、高丽者为
真，其根细而极辛，今多以杜衡伪之。细辛叶如葵，赤黑色，非此则杜衡也。
诸般耳聋，为末蜡丸，绵包塞之，戒怒气。（验方第一。）
鼻中息肉，为末常吹。（第二。）
暗风猝倒，为末吹鼻。（第三。）
虚寒呕哕，稍佐丁香，每柿蒂汤下末二钱。（第四。）
小儿客忤不语，同桂心末，少纳口中。（第五。）
小儿口疮，为末，醋合敷脐上。（第六。）
口舌生疮，细辛、黄连等分，为末掺之，漱涎甚效。（第七。）
口臭， 齿肿痛，煎漱吐之。（第八。）
酒洗用。恶黄 、大黄、大戟、干姜、大枣、干漆、山茱萸。
苦，咸而寒，无毒。入手太阴肺，足太阳膀胱。治惊邪狂惑，疗寒热酸痛。利水泻热，
清金
除烦。退热淋而通鼻塞，解温疟而止遗溺。泯自汗灼热、多睡之风温，疗身热肢满、昏迷之
暴风。
生平原川谷，今处处有之。二八月采，茎叶颇类柳叶。六七月开红花，八月结实。根黄
白色
妇人遗溺，同芍药末酒服。（验方第一。）
血淋热淋。同上。（第二。）
妇人血厥如风，平居无苦疾，忽如死人，目闭口噤，移时方省，亦名郁冒。白薇、当归
各一两，人参五钱，甘草二
钱，每五钱水煎服。（第三。）
金疮出血，为末帖之。（第四。）
鼻不知香臭，同贝母、冬花、百部末，每米汤下一钱。（第五。）
去除头部和双叶，用水浸泡后干燥使用。忌与黄芩、野狼毒、山茱萸同用，避免食用生菜和狸肉，畏惧硝石和滑石，与藜芦相反。
味辛，性温，无毒，药性升散。入足厥阴肝经和足少阴肾经。能祛除头风并止咳，治疗牙痛并通利气机，驱散寒湿并清除浊邪，消除水饮并化解痰浊。可治愈癫痫等风疾，解除痹痛中的风湿之邪，调和全身关节的拘挛，且能润燥通便。平息因风引起的目泪淋漓，兼治睫毛倒睫，通利鼻塞，也能缓解耳聋。不可过量使用。
凡使用细辛时，勿用杜衡。茎柔细根直且色紫，味道极辛的是细辛。茎稍粗，根弯曲呈黄白色，味道也辛的是杜衡。根部形状同细辛，颜色像杜衡，味道辛微苦的是鬼督邮。各地都有生长，以华阴和高丽产的为正宗，其根细而极辛，现在多以杜衡伪充。细辛叶像葵菜，呈赤黑色，如果不是这样就是杜衡了。
各种类型的耳聋，将药研成末，用蜡制成丸剂，用棉包裹塞入耳中，同时戒除怒气。（验方第一。）
鼻中息肉，将药研成末经常吹入鼻腔。（第二。）
暗风猝然昏倒，将药研成末吹入鼻腔。（第三。）
虚寒引起的呕吐呃逆，稍加丁香配合，每次用柿蒂汤送服药末二钱。（第四。）
小儿口疮，将药研成末，用醋调和敷在肚脐上。（第六。）
口舌生疮，细辛与黄连各等分，研成末撒布患处，漱口吐涎效果很好。（第七。）
用酒洗后使用。忌与黄芩、大黄、大戟、干姜、大枣、干漆、山茱萸同用。
味苦、咸，性寒，无毒。入手太阴肺经和足太阳膀胱经。治疗惊邪狂惑，疗治寒热酸痛。利水泻热，清金除烦。退热淋并通鼻塞，解温疟并止遗尿。消除自汗灼热和多睡的风温症状，疗治身热肢满、昏迷的暴风症状。
生长在平原川谷，现在各地都有生长。二月和八月采收，茎叶颇像柳叶。六七月开红花，八月结果实。根呈黄白色。
妇人遗尿，与芍药末一起用酒送服。（验方第一。）
妇人血厥如中风状，平时没有痛苦疾病，忽然像死人一样，眼睛闭合嘴巴紧闭，过一段时间才清醒，也叫郁冒。白薇、当归各一两，人参五钱，甘草二钱，每次取五钱加水煎服。（第三。）
金创出血，将药研成末贴敷患处。（第四。）
Remove the head and double leaves, soak in water, and use after drying. It is incompatible with Scutellariae Radix (Huangqin, 黄芩), Potentillae Anserinae Rhizoma et Radix (Yelangdu, 野狼毒), and Corni Fructus (Shanzhuyu, 山茱萸). Avoid consuming raw vegetables and civet meat. It fears Natrii Sulfas (Xiaoshi, 硝石) and Talcum (Huashi, 滑石), and is antagonistic to Veratri Radix (Lilu, 藜芦).
Pungent, warm, non-toxic, with an ascending nature. Enters the Foot-Jueyin Liver Meridian and Foot-Shaoyin Kidney Meridian. It expels wind from the head and stops coughing, treats toothache and unblocks qi mechanism, drives out cold-dampness and clears turbidity, eliminates fluid retention and breaks phlegm. It cures epileptic wind disorders, resolves rheumatic bi-pain, harmonizes spasms of all joints, and moistens dry stool constipation. It calms wind-induced tearing eyes, treats inverted eyelashes, unblocks nasal congestion, and also relieves deafness. Do not use excessively.
When using Asari Radix et Rhizoma (Xixin, 细辛), do not use Dysosma Veinedii Rhizoma (Duheng, 杜衡). The one with soft stems, fine straight roots, purple color, and extremely pungent taste is Asari Radix et Rhizoma. The one with slightly coarse stems, curved yellowish-white roots, and pungent taste is Dysosma Veinedii Rhizoma. The one with roots similar to Asari Radix et Rhizoma, color like Dysosma Veinedii Rhizoma, and pungent-bitter taste is Imperatae Rhizoma (Guidu'you, 鬼督邮). It grows everywhere, but those from Huayin and Korea are considered authentic; their roots are fine and extremely pungent. Currently, Dysosma Veinedii Rhizoma is often used as a fake. Asari Radix et Rhizoma has leaves resembling Malva verticillata, reddish-black in color; if not this, it is Dysosma Veinedii Rhizoma.
For various types of deafness, grind into powder, make wax pills, wrap in cotton, and insert into the ear. Abandon anger. (Verified Formula No. 1.)
For nasal polyps, grind into powder and blow into the nose regularly. (No. 2.)
For sudden collapse due to hidden wind, grind into powder and blow into the nose. (No. 3.)
For vomiting and hiccups due to deficiency-cold, add a little Illicium Star Anise Fruit (Dingxiang, 丁香), and take two qian of powder with Persimmon Calyx Decoction (Shidi Tang, 柿蒂汤). (No. 4.)
For children suffering from "Ke Wu" (sudden fright/illness) and muteness, mix with Cinnamomi Ramulus (Guixin, 桂心) powder and place a small amount in the mouth. (No. 5.)
For oral ulcers in children, grind into powder, mix with vinegar, and apply to the umbilicus. (No. 6.)
For sores on the mouth and tongue, use equal parts of Asari Radix et Rhizoma (Xixin, 细辛) and Coptidis Rhizoma (Huanglian, 黄连), grind into powder, sprinkle on the lesion, and rinse saliva out; this is very effective. (No. 7.)
For bad breath and swollen painful teeth, decoct and use for rinsing and spitting out. (No. 8.)
Use after washing with wine. Incompatible with Scutellariae Radix (Huangqin, 黄芩), Rheiae Radix et Rhizoma (Dahuang, 大黄), Euphorbiae Pekinensis Radix (Daji, 大戟), Zingiberis Rhizoma Recens (Ganjiang, 干姜), Jujubae Fructus (Dazao, 大枣), Lac Resina (Ganqi, 干漆), and Corni Fructus (Shanzhuyu, 山茱萸).
Bitter, salty, cold, non-toxic. Enters the Hand-Taiyin Lung Meridian and Foot-Taiyang Bladder Meridian. Treats fright evil and mania/confusion, cures cold-heat soreness and pain. Promotes urination and drains heat, clears Metal (Lung) and removes irritability. Reduces hot strangury and unblocks nasal congestion, resolves warm malaria and stops enuresis. Eliminates spontaneous sweating, burning heat, and excessive sleepiness caused by wind-warmth; treats body heat, limb fullness, and coma caused by violent wind.
Grows in plains and river valleys; now found everywhere. Harvested in February and August. Stems and leaves resemble willow leaves. Blooms red flowers in June and July, bears fruit in August. Roots are yellowish-white.
For female enuresis, take with Paeoniae Radix Alba (Shaoyao, 芍药) powder and wine. (Verified Formula No. 1.)
For hematuria and hot strangury. Same as above. (No. 2.)
For female blood-jue (syncope/collapse) resembling wind-stroke: usually no chronic illness, but suddenly appears dead, eyes closed, jaw clenched, regaining consciousness after some time. Also called Yu Mao (depression/dizziness). Baiwei Radix (Baiwei, 白薇) and Angelicae Sinensis Radix (Danggui, 当归) each 1 liang, Ginseng Radix (Renshen, 人参) 5 qian, Glycyrrhizae Radix et Rhizoma (Gancao, 甘草) 2 qian. Take 5 qian, decoct in water, and take orally. (No. 3.)
For traumatic bleeding, grind into powder and apply topically. (No. 4.)
For loss of smell/taste in nose, mix with Pinelliae Rhizoma Preparatum (Beimu, 贝母), Adenophorae Radix (Donghua, 冬花), and Stemona Radix (Baibu, 百部) powder. Take 1 qian with rice soup. (No. 5.)