（《本经》下品）
【释名】牙子（《本经》）、野狼齿（《别录》）、野狼子（《别录》）、犬牙（《吴普》）、抱牙
（《吴普》）、支兰（李当之）。
弘景曰∶其牙似兽之齿牙，故有诸名。
【集解】《别录》曰∶野狼牙生淮南川谷及冤句。八月采根，曝干。中湿腐烂生衣者，杀
人。
普曰∶叶青，根黄赤，六七月华，八月实黑，正月、八月采根。
保升曰∶所在有之。苗似蛇莓而浓大，深绿色。根黑，若兽之牙。三月、八月采根，日
干。
颂曰∶今江东、汴东州郡多有之。
时珍曰∶《范子计然》云∶出建康及三辅，色白者善。
根
【气味】苦，寒，有毒。《别录》曰∶酸。普曰∶神农、黄帝∶苦，有毒。桐君∶辛；
岐伯、雷公、扁鹊∶苦，无毒。
之才曰∶芜荑为之使，恶地榆、枣肌。
【主治】邪气热气，疥瘙恶疡疮痔，去白虫（《本经》）。治浮风瘙痒，煎汁洗恶疮（甄
权）。杀腹脏一切虫，止赤白痢，煎
【附方】旧六，新四。
金疮出血∶野狼牙草茎叶，熟捣贴之。（《肘后方》）
小便溺血∶金粟野狼牙草（焙干，入蚌粉炒）、槐花、百药煎等分。为末。每服三钱，米
泔空心调服。亦治酒病。（《卫生易简方》）
寸白诸虫∶野狼牙五两。捣末，蜜丸麻子大。隔宿不食，明旦以浆水下一合，服尽即瘥。
（《
虫疮瘙痒∶六月以前采野狼牙叶，以后用根，生 咀，以木叶裹之， 火
之，冷即止。（杨炎《南行方》）
小儿阴疮∶野狼牙草，浓煮汁洗之。（《千金方》）
妇人阴痒∶野狼牙二两，蛇床子三两，煎水热洗。（《外台秘要》）
妇人阴蚀疮烂者∶野狼牙汤∶用野狼牙三两，水四升，煎取半升，以箸缠绵浸汤沥洗，日四、
五遍。（张仲景《金匮玉函》）
耳出汁∶野狼牙研末，绵裹，日塞之。（《圣惠方》）
毒蛇伤螫∶独茎野狼牙根或叶，捣烂，腊猪脂和涂，立瘥。（崔氏方）
射工中人有疮∶野狼牙，冬取根，夏取叶，捣汁饮四五合，并敷之。（《千金方》）
【释名】牙子（出自《本经》）、野狼齿（出自《别录》）、野狼子（出自《别录》）、犬牙（出自吴普）、抱牙（出自吴普）、支兰（出自李当之）。
陶弘景说：它的牙齿形状像野兽的牙齿，所以有这些名称。
【集解】《别录》记载：野狼牙生长在淮南的河流山谷以及冤句地区。八月采集根部，晒干。如果受潮腐烂并长出菌衣的，会毒死人。
吴普说：叶子青色，根黄红色，六月七月开花，八月果实变黑，正月和八月采集根部。
苏保升说：各地都有生长。苗叶像蛇莓但更浓密宽大，呈深绿色。根是黑色的，形状像野兽的牙齿。三月和八月采集根部，晒干。
苏颂说：现在江东、汴东等地的州郡多有生长。
李时珍说：《范子计然》记载：出产在建康和三辅地区，颜色白色的品质好。
根
【气味】味苦，性寒，有毒。《别录》记载：味酸。吴普说：神农、黄帝认为：味苦，有毒。桐君认为：味辛；岐伯、雷公、扁鹊认为：味苦，无毒。
徐之才说：芜荑作为其引经药，畏恶地榆、枣肌。
【主治】邪气热气，疥癣恶疮痔疮，去除白虫（出自《本经》）。治疗风热瘙痒，煎煮汁液清洗恶疮（甄权）。杀灭腹脏一切寄生虫，止住赤白痢疾，煎煮……
【附方】旧方六首，新方四首。
金创出血：取野狼牙草的茎叶，捣烂后贴敷患处。（出自《肘后方》）
小便尿血：金粟野狼牙草（焙干，加入蚌粉炒制）、槐花、百药煎各等分。研为末。每次服用三钱，空腹用米泔水调服。也能治疗酒病。（出自《卫生易简方》）
寸白虫及其他寄生虫：野狼牙五两。捣碎成末，用蜂蜜制成如麻子大小的丸剂。隔夜不进食，次日清晨用浆水下送一合，服完即愈。（出自……）
虫疮瘙痒：六月以前采集野狼牙叶，以后用根，生嚼，用木叶包裹，在火上烤，冷后即停止。（杨炎《南行方》）
小儿阴部疮疡：野狼牙草，浓煎汁液清洗患处。（出自《千金方》）
妇人阴部瘙痒：野狼牙二两，蛇床子三两，煎水热敷洗。（出自《外台秘要》）
妇人阴部蚀烂疮：野狼牙汤：用野狼牙三两，水四升，煎取半升，用筷子缠绕棉絮浸透药液沥洗，每天四、五次。（张仲景《金匮玉函》）
耳道流脓：野狼牙研成末，用绵布包裹，每日塞入耳中。（出自《圣惠方》）
毒蛇咬伤：单株野狼牙的根或叶，捣烂，与腊月猪脂混合涂抹，立即痊愈。（崔氏方）
射工中人致疮：野狼牙，冬天取根，夏天取叶，捣汁饮用四五合，并外敷患处。（出自《千金方》）
(Recorded in the Lower Category of *Shennong Bencao Jing*)
**[Names]** Yazi (from *Benjing*), Yelangchi (from *Bielu*), Yelangzi (from *Bielu*), Canine Tooth (from Wu Pu), Baoya (from Wu Pu), Zhilan (from Li Dangzhi).
Tao Hongjing stated: Its teeth resemble those of beasts, hence these names.
**[Collection and Explanation]** *Bielu* records: Yelangya grows in the river valleys of Huainan and the Yuanju region. The roots are harvested in August and sun-dried. Those that have rotted due to dampness and developed fungal growth are poisonous to humans.
Wu Pu stated: The leaves are green, the roots yellowish-red. It flowers in June and July, and the fruit turns black in August. Roots are harvested in January and August.
Su Baosheng stated: It is found everywhere. The seedlings resemble *Duchesnea indica* (Snake Strawberry) but are denser and larger, with a deep green color. The roots are black and shaped like beast teeth. Roots are harvested in March and August and sun-dried.
Su Song stated: It is now abundant in the prefectures of Jiangdong and east of Bian.
Li Shizhen stated: *Fanzi Jiran* records: It originates from Jiankang and Sanfu regions; those with white color are superior.
Root
**[Flavor and Properties]** Bitter, Cold, Toxic. *Bielu* records: Sour. Wu Pu stated: Shennong and Huangdi considered it bitter and toxic. Tong Jun considered it pungent; Qibo, Leigong, and Bian Que considered it bitter and non-toxic.
Xu Zhicai stated: *Wuyi* serves as its guiding herb; it is incompatible with *Diuyu* (Sanguisorbae Radix) and *Zaoji*.
**[Indications]** Evil qi and hot qi, scabies, foul sores, ulcers, and hemorrhoids; expels tapeworms (*Benjing*). Treats wind-heat pruritus; decoct the juice to wash foul sores (Zhen Quan). Kills all parasites in the abdomen and viscera; stops bloody and white dysentery; decoct...
**[Prescriptions]** Six old prescriptions, four new prescriptions.
Golden wound bleeding: Take the stems and leaves of Yelangya grass, crush them thoroughly, and apply externally. (*Zhouhou Fang*)
Hematuria: Jinshu Yelangya grass (roasted dry, stir-fried with clam powder), Sophora flower (*Huaihua*), and Baiyaojian in equal parts. Grind into powder. Take 3 qian each time, mixed with rice washing water on an empty stomach. Also treats alcohol-related ailments. (*Weisheng Yijian Fang*)
Tapeworms and other parasites: 5 liang of Yelangya. Crush into powder, make pills with honey the size of hemp seeds. Fast overnight, and the next morning swallow one he with grain water. Complete cure upon finishing the dose. (*Source incomplete*)
Parasitic sores and itching: Harvest Yelangya leaves before June, and roots after June. Chew raw, wrap in wooden leaves, roast over fire, and stop when cool. (Yang Yan, *Nanxing Fang*)
Pediatric genital ulcers: Decoct Yelangya grass strongly and wash the affected area. (*Qianjin Fang*)
Female genital pruritus: 2 liang of Yelangya, 3 liang of Cnidium fruit (*Shechuangzi*). Decoct with water for hot washing. (*Waitai Miyao*)
Female genital erosive ulcers: Yelangya Decoction: Use 3 liang of Yelangya, add 4 sheng of water, decoct until half a sheng remains. Wrap cotton around chopsticks, dip in the decoction, and drip/wash the area, 4-5 times daily. (Zhang Zhongjing, *Jingui Yufan*)
Otorrhea (Ear discharge): Grind Yelangya into powder, wrap in silk/cotton, and insert into the ear daily. (*Shenghui Fang*)
Viper bite: Single-stem Yelangya root or leaf, crush into a paste, mix with lard from the twelfth lunar month, and apply. Immediate cure. (Cui Shi's Formula)
Splay-riddle (Archery Bug) induced sores: Yelangya. Harvest roots in winter, leaves in summer. Crush and drink the juice (4-5 he), and apply externally. (*Qianjin Fang*)