Probable sodium channel pore blocker that dose-dependently inhibits voltage-gated sodium channels (VGSC) on DUM neurons in a way similar to tetrodotoxin. Has no effect on the kinetics of activation and inactivation. Seems not to interact with VGSC in an inactivated state. In vivo, reversibly paralyzes cockroaches, and can enhance the muscular contraction elicited by stimulating its nerve