黄芩为唇形科多年生草本植物,其根入药,11～12月间采挖。除去须根及泥沙,晒后撞去粗皮,晒干。黄芩性味苦寒,入心、肺、胆、大肠经。具有清热燥湿、泻火解毒、止血、安胎的功能,可用于湿温、暑温胸闷呕恶, Astragalus is a perennial herb of the Labiatae family. Its roots are used as medicine and is excavated between November and December. Remove fibrous roots and silt, after the sun hit the rough skin, dried. Astragalus tastes bitter cold, into the heart, lungs, gallbladder, and large intestine. With heat dampness, Xiehuo detoxification, hemostasis, fetal function, can be used for wet temperature, hot chest tightness and vomiting,