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(A) Tracing from a typical experiment showing the effect of increasing doses of crude extract of Viola odorata (Vo.Cr) on mean arterial blood pressure (MAP) of an anaesthetized rat. Small triangles indicate the times at which the drugs were administered. (B) Bar chart represents combined effect (mean ± SEM) of 5 experiments. * P < 0.05; *** P < 0.001 (One way ANOVA followed by Tukey's multiple comparison).
