Percent analgesic activity of VBME (100, 200 and 300mg/kg) in acetic acid induce pain model. Bars present as mean ± S.E.M. of percent analgesia for group of six animals. The data was analyzed by ANOVA followed by Dunnett's test. Asterisks indicated statistically significant values from control. *P < 0.05, **P < 0.01.