Effect of essential oils on leaves of E. benthamii, E saligna, Urocam, and Grancam on the open field test: number of crossings (a), rearing (b) and fecal bolus (c) expelled during the session. Mice were treated with vehicle (0.9% NaCl plus 1% of tween 80, 10 ml/kg, p.o., negative control group), or indomethacin (10 mg/kg p.o., positive control group) or the essential oils of E. benthamii, E. saligna, Urocam, or Grancam (50 mg/kg, p.o.), 1 h before the exposure to the apparatus (n = 8). One-way ANOVA followed by Bonferroni´s test: ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001 compared to the vehicle-treated (negative control) group. Results expressed as mean ± S.E.M.