曾青、枣根为之使。畏滑石、硝石。恶黄 、野狼毒、山茱萸。反藜芦。忌生菜、狸肉
。
辛、苦、温。入足少阴、厥阴经血分。温经发散。治风寒风湿，头痛脊强，咳逆上气，
水停
心下，痰结惊痫，喉痹咽闭，口疮齿 ，目泪倒睫，耳聋鼻 ，腰足痹痛，拘挛湿痒，奔
豚
瘕疝，乳结便涩。得黄蜡为丸，绵裹塞耳聋。使川连，掺口疮齿 。使桂心，治客忤。研末
吹鼻中，治暗风卒倒，不省人事。（并治鼻中息肉。）
产毕阴者良，北产者细茎色紫，味辛香。拣去双叶者，田瓜水浸一宿，曝干用。风热、
阴虚
、血虚头痛者，禁用。
其性极辛烈。气血两虚者，但用一二分，亦能见效，多则三四分而止。如用至七八分以
及一
钱，真气散，虚气上壅，一时闷绝。
畏黄 、干姜、大枣、山茱萸、大黄、大戟、干漆。
苦、咸、寒。阳明冲任之药。利阴气，下水气。治风温灼热，自汗身重，多眠鼻鼾，语
言难
出，及温疟血厥，热淋遗尿。得白芍，治血淋热淋，及妇人遗尿。（不拘胎前产后。）配贝母
、冬花、百部，治肺实鼻塞。配石膏、竹茹、甘草、桂枝，治胎前虚烦呕逆。佐人参、当归
、甘草，治血厥。（出汗过多，血少阳气独上，气塞不行，故身如死。气过血还，阴阳复通
，故移时方寤。妇人尤多此症。）
去须酒洗，或糯米泔浸一宿，蒸用。血虚气弱者禁用。
曾青、枣根是它的引经药。它畏惧滑石、硝石。厌恶黄芩、野狼毒、山茱萸。与藜芦相反。忌食生菜、狸肉。
（细辛）味辛、苦，性温。入足少阴肾经、足厥阴肝经的血分。能温通经脉，发散风寒。治疗风寒风湿引起的头痛、项背强直，咳嗽气逆，水饮停聚于心下，痰结导致的惊痫，喉痹咽闭，口疮齿痛，目泪不止、倒睫，耳聋鼻塞，腰足痹痛，拘挛湿痒，奔豚瘕疝，乳房结块、小便涩滞。配合黄蜡制成丸剂，用棉包裹塞入耳中，可治耳聋。配合黄连，外掺治疗口疮齿痛。配合桂心，治疗客忤邪气。研成粉末吹入鼻中，治疗暗风卒然昏倒，不省人事。（同时也能治疗鼻中息肉。）
产后阴证者使用效果良好。北地产的细辛茎细色紫，味道辛香。拣去双叶的，用田瓜水浸泡一夜，晒干后使用。风热、阴虚、血虚引起的头痛者，禁用。
其性质极其辛烈。气血两虚的人，只用一二分，也能见效，最多三四分为止。如果用到七八分乃至一钱，会导致真气散失，虚气上壅，一时闷绝。
（白薇）味苦、咸，性寒。是作用于阳明经和冲任脉的药物。能利阴气，下行水气。治疗风温灼热，自汗身重，多眠鼻鼾，语言难出，以及温疟血厥，热淋遗尿。配合白芍，治疗血淋热淋，以及妇人遗尿。（不拘胎前产后）。配伍贝母、冬花、百部，治疗肺实鼻塞。配伍石膏、竹茹、甘草、桂枝，治疗胎前虚烦呕逆。佐以人参、当归、甘草，治疗血厥。（出汗过多，血少阳气独上，气塞不行，所以身体像死了一样。气过血还，阴阳重新通畅，所以过了一会儿才苏醒。妇人尤其多有此症。）
Zengqing (Chrysocolla) and Zaogen (Root of Ziziphus jujuba) are its guiding herbs. It is incompatible with Huashi (Talcum), Xiaoshi (Niter). It dislikes Huangqin (Scutellariae Radix), Yelangdu (Euphorbia fischeriana Root), and Shanzhuyu (Corni Fructus). It is contraindicated with Lilu (Veratri Rhizoma). Raw vegetables and狸肉 (fox meat) should be avoided.
Pungent, bitter, warm. Enters the blood level of the Foot-Shaoyin Kidney Meridian and Foot-Jueyin Liver Meridian. Warms the meridians and disperses pathogens. Treats headache and stiffness of the spine caused by wind-cold-dampness; coughing and rebellious qi; fluid retention under the heart; phlegm accumulation leading to fright and epilepsy; throat obstruction and closure; mouth sores and toothache; excessive tearing and inverted eyelashes; deafness and nasal congestion; bi-syndrome and pain in the waist and feet; spasms, dampness, and itching; Ben Tun (fleeing pig) and hernia; breast nodules and difficult urination. Combined with Huangla (Yellow Beeswax) into pills, wrapped in cotton and inserted into the ear, it treats deafness. Combined with Chuanlian (Coptidis Rhizoma), applied externally, it treats mouth sores and toothache. Combined with Guixin (Cinnamon Twig Heart), it treats Ke Wu (external evil invasion). Ground into powder and insufflated into the nose, it treats An Feng (hidden wind) causing sudden collapse and loss of consciousness. (Also treats nasal polyps.)
It is effective for postpartum yin syndromes. The northern variety has thin stems, purple color, and a pungent fragrance. Discard those with double leaves; soak in Tiangua water overnight, then dry in the sun before use. Contraindicated for headaches caused by wind-heat, yin deficiency, or blood deficiency.
Its nature is extremely pungent and acrid. For patients with both qi and blood deficiency, using only 1-2 fen can be effective; do not exceed 3-4 fen. If used up to 7-8 fen or even 1 qian, true qi will scatter, deficient qi will rush upward causing blockage, leading to sudden suffocation and unconsciousness.
(Baiwei) Is incompatible with Huangqin (Scutellariae Radix), Ganjiang (Zingiberis Rhizoma), Dazao (Jujubae Fructus), Shanzhuyu (Corni Fructus), Dahuang (Rhei Radix et Rhizoma), Daji (Euphorbiae Pekinensis Radix), and Ganqi (Lacca Resina).
Bitter, salty, cold. A herb acting on the Yangming Meridian and the Chong and Ren vessels. Benefits yin qi and promotes the downward movement of water qi. Treats burning heat from wind-warmth, spontaneous sweating with heaviness of the body, somnolence with snoring, difficulty in speech, as well as Wen Nue (warm malaria) and Xue Jue (blood syncope); hot strangury and enuresis. Combined with Baishao (Paeoniae Radix Alba), it treats bloody strangury, hot strangury, and enuresis in women. (Applicable regardless of pre- or postpartum state.) Paired with Beimu (Fritillariae Bulbus), Donghua (Adenophorae Radix), and Bubu (Stemonae Radix), it treats lung excess with nasal congestion. Paired with Shigao (Gypsum Fibrosum), Zhuru (Bambusae Caulis in Taenia), Gancao (Glycyrrhizae Radix et Rhizoma), and Guizhi (Cinnamomi Ramulus), it treats prepartum deficiency heat with irritability and vomiting. Assisted by Renshen (Ginseng Radix), Danggui (Angelicae Sinensis Radix), and Gancao (Glycyrrhizae Radix et Rhizoma), it treats Xue Jue (blood syncope). (Excessive sweating leads to blood deficiency and solitary rising of yang qi; qi blockage causes the body to feel like death. When qi passes and blood returns, yin and yang reconnect, so consciousness returns after some time. This syndrome is particularly common in women.)
Remove the rootlets, wash with wine, or soak in rice washing water overnight, then steam before use. Contraindicated for patients with blood deficiency and weak qi.