2. Ligustrazine can dilate coronary artery, increase coronary blood flow, improve myocardial oxygen supply and reduce myocardial oxygen consumption; Ligustrazine can dilate cerebral vessels, reduce vascular resistance, significantly increase blood flow in brain and limbs and improve microcirculation. It can reduce platelet surface activity, inhibit platelet aggregation and prevent thrombosis. The neutral component of ferulic acid is promoted in small dose and inhibited in large dose in uterine smooth muscle. The decoction has sedative effect on the central nervous system of animals, and has obvious and lasting antihypertensive effect; It can accelerate the absorption of local hematoma of fracture and promote the formation of callus; It has anti-vitamin e deficiency effect; Can inhibit a variety of bacilli; It has antihistamine and cholagogic effects.