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日草根(大苞萱草根)的功效主治与临床应用

ว 2026-09-09 23:09:28ที่ 临床应用เ 中国国际医疗服务系统
日草根别名为黄花菜根,是百合科植物大苞萱草Hemerocallis middendorjii Trautv. et Mey.的根。多年生草本,具短缩的根茎及肉质肥厚的纺锤状块根。叶基生排成2列宽线形长50-80cm宽1-3.5cm柔软上部下弯。花葶与叶近等长不分枝圆柱形粗壮,在顶端聚生2-6花,苞片宽卵形,花近簇生具很短的花梗,花被金黄色至橘黄色,花被管长1-1.7cm,花盛开时花被裂片长6-8cm内三片宽2-3cm。蒴果椭圆形稍三钝棱长约2cm,花果期6-10月。生于海拔较低的山沟、溪边或林下阴湿地,分布于黑龙江、吉林和秦岭以南各省区。春、秋季采挖洗净开水烫后晒干。性味性凉味甘。功能清热、利尿消肿。现代药理试验结果表明萱草根具有抗血吸虫病和抗结核病的作用。临床应用用量3-6g水煎服,内服用量过多会损害视力故以外用为主,临床上多用鲜根捣烂敷患处。萱草有一定毒性主要集中在根部易于在体内积蓄,因此注意不要长期服用,如有中毒反应可用黄连、黄檗解除部分毒性。主要成分根含大黄酸、大黄酚、钝叶决明素及钝叶决明甲醚,还含萱草根素。
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