Butylphthalide has a therapeutic effect on cerebral infarction. Butanephthalein is used for the improvement of neurological deficits in patients with acute ischemic stroke. Pharmacological studies show that butanephthalein has an ameliorating effect on the damage of central nervous function in patients with acute ischemic stroke, and can promote the improvement of neurological deficits in patients. Animal pharmacodynamic studies show that butanophthalein can block multiple pathological aspects of brain damage caused by ischemic stroke, has strong anti-ischemic effect, can significantly reduce the infarct area of local cerebral ischemia, reduce cerebral edema, improve brain energy metabolism and ischemic brain area of microcirculation and blood flow, inhibit neuronal apoptosis, and has the effect of anti-thrombosis and anti-platelet aggregation. Butanephthalein may exert the above pharmacodynamic effects through the mechanisms of decreasing the content of arachidonic acid, increasing the levels of NO and PGI₂ in cerebral vascular endothelium, inhibiting the release of glutamate, decreasing the concentration of intracellular calcium, inhibiting the free radicals and increasing the activity of antioxidant enzymes. Both injection and softgel capsule of butylphthalide are prescription drugs with different contraindications. For butylphthalein injection, use with caution in patients with bradycardia, sick sinus syndrome, those with hepatic impairment, and those with severe bleeding tendency. For butylphthalide soft capsule, it should be contraindicated in those who are allergic to this product or celery, and those with severe bleeding tendency. It should be used with caution in those with severe impairment of liver and kidney function, and those with psychiatric symptoms. In addition, it is recommended to go to the hospital specialist outpatient clinic for regular review according to the situation, need to be under the guidance of neurologist comprehensive use of butylphthalide drug therapy, and regular monitoring of blood routine and liver function.