By inhibiting Nav1.7/SCN9A sodium channel, may prevent signal transmission caused by tick penetration and the blood taken, allowing the tick to avoid discovery. Weakly and specifically inhibits Nav1.7/SCN9A (IC(50)=1.6 uM). Significantly shifts the steady-state inactivation curve of the Nav1.7/SCN9A in the hyperpolarized direction. Does not induce changes to I-V curve and conductance-voltage relationship