The investigators conducted a randomized, double-blind, trial enrolled 60 patients within 12 hours of acute ischemic stroke (AIS) in China. Patients were randomly assigned to receive a 10-day infusion of dl-3-n-butylphthalide (NBP) or cerebrolysin, or placebo. National Institutes of Health Stroke Scale (NIHSS) and Barthel Index (BI) were used to evaluate the efficacy in the patients with AIS at 11-day and 21-day after therapy. Adverse events were also analyzed among the three groups.