延胡索来源于罂粟科草本植物延胡索的干燥块茎。处方多以延胡索,元胡,玄胡见之。功效为活血行气,止痛。主治胸、胁、脘、腹等痛症,又是伤科活血止痛的要药。明代陈嘉谟在《本草蒙鉴》中有:“ Corydalis is derived from the dried tubers of the Papaveraceae herb Corydalis. Prescriptions are mostly found in Yanhusuo, Yuanhu and Xuanhu. The effect is blood circulation and pain relief. Attending chest, threatening, scrofula, abdomen and other pain, but also hurt the blood to relieve pain medicine. Chen Jiaxuan of the Ming Dynasty in the “Materia Medica Monk Kam” includes: "