古名通脱木。味甘淡。性平。无毒。禀土之清气。兼得天之阳气以生。降也。阳中阴也。
【主治】主利阴窍。治五淋。除水肿。癃闭。泻肺。（本经）解诸毒虫痛。（苏颂）明目
退热。
【归经】入肺胃二经。为利水退热之品。（兼轻剂 入肺引热下行入胃通气上达）
【前论】东垣曰。通草泻肺利小便。甘平以缓阴血也。与灯草同功。宜生用。佐番降香、
红
【禁忌】经疏曰。虚脱人。孕妇。均忌。
味苦咸。性寒。无毒。禀天地清燥阴寒之气以生。降多于升。阴也。恶螵蛸、茯苓
、桔梗、萆 。
【主治】主头风黄胆。咳逆。淋沥。女子阴中肿痛。湿痹死肌。不可屈伸起止行步。（本
经）
切热毒
黄。（
（苏颂）
【归经】入脾胃二经。兼入膀胱小肠二经。为祛风除湿之品。（诸黄风痹要药）
【前论】时珍曰。气寒善行。味苦性燥。脾胃二经去湿热药也。亦入肺大肠为诸黄风痹
必需
【禁忌】经疏曰。下部虚寒之人。虽有湿症。勿用。
【炮制】备要曰。凡使。取根黄白而心实者。取皮用。
味苦甘。性微温。无毒。感土泽之气。兼得春气以生。降也。阴中阳也。防己为使。
【主治】主金疮。痈肿疮脓。（本经）产后腹痛。频产血气衰冷。成劳羸瘦。妇人血沥
腰
痛。（甄权）胎前产后百病。通九窍。利关节。养血气。破宿血。消症瘕。通小肠。长肌肉。
消扑
【归经】入肝脾二经。为行血消水之品。（苦泄热甘和血辛散郁香舒脾 散阴中之阳）
【前论】苏颂曰。治妇人方中。最为急用。〔泽兰子〕主妇人三十六疾。千金方承泽丸
中
用
【炮制】雷公曰。此能破血。通久积。须细锉。绢袋盛。悬屋南畔角上。令干用。
[ Tongcao ]
Anciently known as *Tongtuomu* (Pseudoginseng stem). Flavor: sweet and bland. Nature: neutral. Non-toxic. It inherits the clear qi of Earth and is born with the yang qi of Heaven. Action: descending. Category: Yin within Yang.
【Indications】Primarily unblocks the yin orifices. Treats the five types of strangury (Shi, Qi, Xue, Gao, Lao Lin). Eliminates edema. Gongbi (difficulty in urination or urinary retention). Drains Lung heat. (From *Ben Jing*). Resolves pain from various venomous insect bites. (Su Song). Brightens eyes and reduces fever.
【Meridian Tropism】Enters the Lung and Stomach meridians. A substance for promoting diuresis and reducing fever. (Also acts as a light agent; enters the Lung to guide heat downward and enters the Stomach to facilitate the upward reach of Qi.)
【Preceding Discussions】Li Dongyuan stated: Tongcao drains Lung heat and promotes urination; its sweet and neutral nature soothes Yin blood. It shares the same function as Jiedacaodengxincao (Juncus effusus). It should be used raw. Combined with Fanjiangxiang (Aquilaria sinensis) and Hong... [Text incomplete]
【Contraindications】Miao Xiyong's *Bencao Jingshu* states: Contraindicated for those with deficiency collapse and pregnant women.
[ Baixianpi ]
Flavor: bitter and salty. Nature: cold. Non-toxic. Born inheriting the clear, dry, yin, and cold qi of Heaven and Earth. Descending action exceeds ascending; it belongs to Yin. Incompatible with Piaoxiao (Sepiae endoconcha), Fuling (Poria cocos), Jiegeng (Platycodon grandiflorus), and Bixie (Dioscorea hypoglauca).
【Indications】Primarily treats Toufeng (head wind/headache) and Huangdan (jaundice). Ni ke ni (cough and counterflow qi). Linli (scanty painful urination). Swelling and pain in the female genitalia. Shi bi si ji (damp-bi causing dead skin/muscle), inability to flex, extend, rise, sit, walk, or step. (From *Ben Jing*). Clears heat toxins... [Text fragmentary]. Qie re du huang. (Su Song)
【Meridian Tropism】Enters the Spleen and Stomach meridians. Also enters the Bladder and Small Intestine meridians. A substance for dispelling wind and removing dampness. (A key herb for treating various jaundices and wind-bi).
【Preceding Discussions】Li Shizhen stated: Its cold nature facilitates movement; its bitter flavor and drying nature make it an herb for clearing damp-heat in the Spleen and Stomach meridians. It also enters the Lung and Large Intestine meridians and is essential for treating various jaundices and wind-bi.
【Contraindications】Miao Xiyong's *Bencao Jingshu* states: For individuals with deficiency-cold in the lower jiao, even if dampness symptoms are present, do not use.
【Processing】*Bencao Beiyao* states: When using, select roots that are yellowish-white with a solid center, and use the bark.
[ Zelan ]
Flavor: bitter and sweet. Nature: slightly warm. Non-toxic. Perceives the moistening qi of Earth and is born with the qi of Spring. Action: descending. Category: Yang within Yin. Fangji (Stephania tetrandra) serves as the guiding herb.
【Indications】Primarily treats Jinchuang (metal weapon injuries), yong zhong chuang nong (carbuncles, swellings, sores, and pus). Postpartum abdominal pain. Frequent childbirth leading to decline and coldness of Qi and Blood. Development of consumptive emaciation. Female blood dribbling and lower back pain. (Zhen Quan). Hundred diseases before and after childbirth. Unblocks the nine orifices. Benefits joints. Nourishes Qi and Blood. Breaks old blood. Eliminates zheng jia (abdominal masses). Unblocks the Small Intestine. Promotes muscle growth. Eliminates pu... [Text incomplete, likely referring to trauma/injuries]
【Meridian Tropism】Enters the Liver and Spleen meridians. A substance for moving blood and eliminating water. (Bitter drains heat, Sweet harmonizes blood, Pungent disperses stagnation, Fragrant soothes the Spleen, disperses Yang within Yin).
【Preceding Discussions】Su Song stated: Among formulas for treating women, it is most urgently needed. [Zelanzi (Seeds of Eupatorium)] primarily treats the thirty-six diseases of women. Used in the Qianjin Fang Chengze Wan.
【Processing】Lei Gong stated: This herb can break blood and unblock long-standing accumulations. It must be finely chopped. Placed in a silk bag, hung in the corner on the south side of the house, and used after drying.