Figure 1.

Effect of essential oils on leaves of Eucalyptus species obtained by supercritical CO₂ on acetic acid-induced abdominal writhing test. 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. dunnii, E. grandis, E. saligna, Urocam, Grancam, or Urograndis (50 mg/kg, p.o.), 1 h before i.p. acetic acid (0.6%) administration (n = 8). One-way ANOVA followed by Bonferroni´s test: ^∗∗∗P < 0.001 compared to the vehicle-treated (negative control) group. Results expressed as mean ± S.E.M.