The anxiolytic-like effects of sinomenine were investigated by means of behavioral pharmacology for the first time. The other central-acting properties of sinomenine were also examined to see whether clear differences could be observed between it and diazepam.
After acute administration, sinomenine (20 、 40 mg/kg) significantly increased the percentage of open arm entries in the elevated plus-maze test. Sinomenine (20、 40 mg/kg) prolonged the time spent in light area without altering the locomoto...