Antinociceptive Activity of Zanthoxylum piperitum DC. Essential Oil

Figure 3

Effect of essential oil from Zanthoxylum piperitum DC. on glutamate-induced licking in mice. Animals were pretreated with ZPEO (10, 30, or 100 μL/kg, p.o.), morphine (2.5 mg/kg, p.o.), or vehicle (oil). Results are presented as mean ± SD ( = 6–10). Statistical analyses were performed using GraphPad Prism version 5.1 software, by one-way ANOVA with Dunnett’s posttest with multiple comparisons against vehicle-treated group ().