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紫珠叶的功效主治与使用注意

ว 2026-09-09 23:07:36ที่ 临床应用เ 中国国际医疗服务系统
紫珠入药最早见于唐代《本草拾遗》,书中说它生江东林泽间,至秋子熟正紫圆如小珠,解诸毒止出血。后世《本草纲目拾遗》《福建民间草药》《中国药植图鉴》都续有记载,定位一直是收敛止血加清热解毒。别名有紫荆、紫珠草、止血草、白棠子树、珍珠风等。紫珠是马鞭草科紫珠属落叶灌木,高1-3米,小枝圆柱形嫩枝带灰白茸毛,叶对生卵状椭圆形边缘细锯齿,叶背密生黄褐色星状毛加金色透明腺点,花淡紫或粉白聚伞花序腋生,核果小球形熟时紫黑发亮经冬不落。辨认口诀为叶背黄毛带金点,秋天紫果圆如豆。药用基原包括杜虹花(紫珠叶主流基原,产浙闽赣粤桂台)、紫珠/老鸦糊(长江中游常见)、大叶紫珠(叶更大,散瘀止痛更强)、裸花紫珠(华南用得多,《药典》收载)等。药用部位为干燥叶(处方名紫珠叶)或带叶嫩根,夏秋采去杂质,鲜用捣烂外敷,生晒阴干或晒干切段,研粉干叶粉碎过筛得紫珠末外用止血或内服包(1.5-3克)。性味归经为苦、涩,凉,归肝、肺、胃经,核心药性为收敛止血加凉血止血加清热解毒,出血兼热象(血色鲜红、口干、舌红)最对路,虚寒性出血不对症。现代成分含黄酮类、鞣质、酚类、有机酸、氨基酸、缩合鞣质等,药理作用为缩短出凝血时间、抑制金葡菌大肠杆菌痢疾杆菌等、促进创面愈合。功效适用包括各种出血(咯血、呕血、衄血、牙龈血、便血、尿血、崩漏、外伤出血,尤其肺胃热性出血和拔牙后渗血)、热毒疮疡(痈肿、腮腺炎、咽喉痛)、外用(烧烫伤、皮肤溃疡、蛇虫咬伤、跌打红肿)。实用配方举例:肺结核咯血、胃十二指肠溃疡出血用紫珠叶、白及各等份研末每服6克日3次;肠胃出血用紫珠末3-5分调冷开水每4小时一次;鼻衄用紫珠末2钱调蛋清服外用棉蘸末塞鼻;外伤出血用鲜叶洗净捣敷或干末撒伤口包扎;咽喉痛用鲜紫珠叶1两煎一碗频服。注意事项:虚寒性出血忌用,表证初起邪实内盛者慎用,孕妇慎用,脾胃虚寒者内服易腹泻,紫珠注射液可致过敏性休克绝不可自行用,煎汤10-15克(鲜品30-60克),研末1.5-3克,外用适量。
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