Fig. 7. Synergic effect of ginsenosides with 5-HTP on hypnotic response in pentobarbital treated mice (n = 10). The sleep latency (A) and sleep duration (B) are assessed. All data are presented as mean + S.E.M., *p < 0.05, **p < 0.01 vs. vehicle group, ^#p < 0.05, ^##p < 0.01 vs. normal group.