龙须藤，中药材名。本品为为豆科羊蹄甲属植物龙须藤Bauhiniachampioni（Benth.）Benth.的藤。全年可采，鲜用或洗净切片，蒸过，晒干。功能主治为：祛风除湿，活血止痛，健脾理气。用于风湿性关节炎，腰腿疼，跌打损伤，胃痛，小二疳积。
Long-xu-teng, name of Chinese Medicinal Material. This product is the vine of the plant Bauhinia championi (Benth.) Benth. in the Leguminosae family. It can be harvested all year round, used fresh or washed and sliced, steamed, and dried. It is used to dispel wind and dampness, activate blood circulation and relieve pain, invigorate the spleen and regulate qi. It is used for rheumatoid arthritis, lumbago, injuries from falls or blows, stomach pain, and pediatric accumulation.

功效作用 功能
The efficacy and functions

祛风除湿，活血止痛，健脾理气。主治
Dispelling wind and dampness, promoting blood circulation and relieving pain, invigorating the spleen and regulating qi. Mainly used for治疗...

用于风湿性关节炎，腰腿疼，跌打损伤，胃痛，小儿疳积。用法用量
Used for rheumatoid arthritis, lower back and leg pain, bruises, stomach pain, and pediatric malnutrition. Dosage and administration.

0.5～1两。化学成分
0.5~1 liang. Chemical composition

铁藤的根含异谷树碱（isochondrodendrine），左旋箭毒碱（curine），小檗胺（berbamine），轮环藤酚碱（cyclanoline）及木兰花碱（magnoflorine）。药理作用
The roots of Teng Teng vine contain isochondrodendrine, curine, berbamine, cyclanoline, and magnoflorine. These compounds have pharmacological effects.

肌松作用该药中分离得到的左旋、右旋和消旋箭毒碱，经化学半合成制备成季铵盐后，兔垂头试验证明均有明显肌松作用，其中以R构型最强。实验证明氯甲消旋箭毒碱和右旋箭毒碱的肌松作用属于非去极化型，是作用于神经肌肉接头突触膜的乙酰胆碱受体，与乙酰胆碱产生竞争性拮抗作用。肌松剂量的氯甲消旋箭毒碱或右旋箭毒碱对猫颈交感神经节无影响，对猫的降压作用也较弱。氯甲右旋箭毒碱对猫和犬的肌松作用比左旋箭毒碱和筒箭毒碱强。氯甲消旋箭毒碱或右旋箭毒碱有很弱的阿托品样作用。毒理作用
The muscle-relaxing effect of this drug is obtained by isolating the levorotatory, dextrorotatory, and racemic alkaloids from it. After being chemically semi-synthesized into quaternary ammonium salts, it was confirmed through experiments on rabbit head droop that they all have a significant muscle-relaxing effect, with the R configuration being the strongest. Experimental evidence shows that the muscle-relaxing effects of chloroprocaine racemate and dextrorotatory procaine belong to the non-depolarizing type, acting on the acetylcholine receptors of the neuromuscular junction membrane and producing a competitive antagonistic effect with acetylcholine. The muscle-relaxing dose of chloroprocaine racemate or dextrorotatory procaine has no effect on the cat's cervical sympathetic ganglia and also has a weaker hypotensive effect on cats. The muscle-relaxing effect of dextrorotatory chloroprocaine is stronger than that of levorotatory procaine and tubocurarine in cats and dogs. Chloroprocaine racemate or dextrorotatory procaine has a very weak atropine-like effect. Toxicological effects are also observed.

腹腔注射氯甲消旋箭毒或右旋箭毒小鼠的LD50分别为1.08mg／kg和1.9mg/kg，大鼠的LD50分别为0.69mg/kg和1.21mg／kg。治疗指数分别为2.8和3.2（小鼠），1.9和4.3（大鼠）。家兔静脉累积给药未见心电图异常及心、肺、肝、肾的病理变化。怀孕大鼠大剂量给药可出现呼吸抑制，胎仔重量明显减轻，但对胎仔数及胎仔骨骼成形均无影响。药材鉴别 药材性状
The LD50 of intraperitoneal injection of chloroform-dichloromethane extract of Aconitum carmichaeli or Aconitum kusnezoffii in mice is 1.08mg/kg and 1.9mg/kg, respectively, and in rats it is 0.69mg/kg and 1.21mg/kg, respectively. The therapeutic indices are 2.8 and 3.2 for mice, and 1.9 and 4.3 for rats. No electrocardiographic abnormalities or pathological changes in the heart, lungs, liver, or kidneys were observed in rabbits after cumulative intravenous administration. High-dose administration to pregnant rats can lead to respiratory depression and a significant reduction in fetal weight, but has no effect on the number of fetuses or fetal skeletal formation. Identification of medicinal materials and their characteristics.

根圆柱形，稍扭曲，直径0.6-1.5cm。表面浅棕色，有纵向纹理和支根痕，弯曲处有横裂纹。质稍硬，断面灰黄色。气微，味苦。叶破碎，完整的叶阔心形，长6-18cm，先端渐尖，基部浅心形，全缘。表面黄绿色，下表面被子毛茸，掌状脉5-7条较明显。质脆。向微，味苦。显微鉴别根横切面：木栓层为近10余列木栓细胞。中柱鞘石细胞断续成环。射线有单个或成群的石细胞。导管单个或2-3个相连。本品石英钟细胞、薄壁细胞含草酸钙小针晶或棒状结晶。植物学信息 形态特征
The root is cylindrical, slightly twisted, with a diameter of 0.6-1.5cm. The surface is light brown, with longitudinal grooves and root scars, and there are transverse cracks at the bends. It is slightly hard in texture, with a grayish-yellow cross-section. It has a faint odor and a bitter taste. The broken leaves are broadly heart-shaped, 6-18cm long, gradually tapering at the apex, shallowly heart-shaped at the base, and have entire margins. The upper surface is yellowish-green, while the lower surface is hairy with 5-7 distinct palmate veins. The leaves are brittle, with a faint odor and a bitter taste. Microscopic identification of the root cross-section reveals that the cork layer consists of nearly 10 rows of cork cells. The stone sheath cells are discontinuously arranged in rings. The rays contain individual or clustered stone cells. The vessels are single or connected in groups of 2-3. The specimen contains quartz crystal cells and thin-walled cells with small needle-shaped or rod-shaped calcium oxalate crystals. Botanical information: Morphological characteristics.

铁藤木质大藤本，长达10m以上。小枝有纵纹，被短硬毛。叶螺旋状着生；叶柄长3-6cm，被毛；叶片阔心形或三角状阔卵形，长6-18cm，宽5.5-15cm，先端渐尖或短渐尖，基部心形或近截平，全缘，上面光亮无毛，下面被柔毛或硬毛，掌状脉5-7条，连同网脉在背面凸起。花极小，单性异株；雄花花萼合生成坛状，高1-2mm；花瓣4，分离，长圆形，聚药雄蕊盾状；雌花萼片2，深兜状；花瓣2，微小。核果无毛，近球形，内果皮骨质，长约4mm，背部2侧各具3行小瘤状凸起。分布区域
Teng wood is a large woody vine, reaching over 10m in length. The small branches have longitudinal grooves and are covered with short, stiff hairs. The leaves are spirally arranged; the petioles are 3-6cm long and hairy; the leaf blades are broadly heart-shaped or triangular-ovate, 6-18cm long, 5.5-15cm wide, gradually pointed or shortly acuminate at the apex, cordate or nearly truncate at the base, with entire margins. The upper surface is shiny and hairless, while the lower surface is covered with soft or stiff hairs, with 5-7 palmate veins, and raised reticulate veins on the back. The flowers are very small, unisexual on separate plants; the male flowers have a fused calyx forming a cup, 1-2mm high, with 4 separate, oblong petals, and shield-shaped stamens; the female flowers have 2 deeply hooded sepals and 2 tiny petals. The fruit is hairless, nearly spherical, with a bony endocarp, about 4mm long, and with three rows of small tubercular projections on each side of the back. Distribution area.

分布于海南、广西部及云南西南部至东南部等地。生长环境
Distributed in Hainan, western Guangxi, and southwestern to southeastern Yunnan, among other areas. Growing environment.

生于林中，常攀援于乔木上。
Born in the forest, often climbing and clinging to tall trees.