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This study investigates the effects of essential oil of Pterodon polygalaeflorus (EOPP) and β‐caryophyllene (β‐CAR). EOPP and β‐CAR relaxed the basal tone of ileum smooth muscle in a concentration‐dependent manner (IC50s = 394.35 ± 62.12 and 68.65 ± 9.51 μg/mL respectively), an effect that was unaltered by hexamethonium, L‐nitroarginine methyl ester or indomethacin. Both EOPP and β‐CAR evoked a concentration‐dependent...