Ligusticum chuanxiong oil (Changsha Staherb) is a light brown to brownish oily liquid, which is a mixture containing a variety of effective components, mainly including ibutilide (≥ 15%), n-butyl phthalide, ligustrazine, ferulic acid, etc. It has a variety of physiological functions, such as spasmolysis and vasodilation, relieving cough and asthma, and anti-cerebral ischemia. It has the effects of promoting qi and opening depression, activating blood circulation and relieving pain, dispelling wind and dampness, removing fat, and reducing weight.
The volatile oil of ligusticum chuanxiong, especially the phthalides, plays a major role in the pharmacological action of ligusticum chuanxiong. For example, ligusticum chuanxiong oil can relieve the spasm of microvessels, increase the number of open capillaries, speed up blood flow, and make red blood cells depolymerize significantly.