PF-04856264 is a potent and selective Nav1.7 inhibitor, with IC50s of 28, 131, 19, and 42 nM for human, mouse, cynomolgus monkey and dog Nav1.7, respectively. PF-04856264 has low potency against the rat Nav1.7 channel. PF-04856264 shows analgesic effect[2].IC50 & Target: IC50: 28 (human Nav1.7), 131 nM (mouse Nav1.7), 19 nM (cynomolgus monkey Nav1.7), 42 nM (dog Nav1.7)In Vivo: PF-04856264 (3-30 mg/kg; i.p.) reverses OD1-induced pain behaviors[2].