Permethrin is a widely-used pesticide of the pyrethroid family. Permethrin interacts with voltage-gated Na+ channels and inhibits their natural deactivation, causing the channels to remain open for a long time and destroying equilibrium of the neuronal system. Pyrethroids are also thought to interact with GABA receptors and associated pathways.;Permethrin is a widely-used pesticide of the pyrethroid family. Permethrin interacts with voltage-gated Na+ channels and inhibits their natural deactivation, causing the channels to remain open for a long time and destroying equilibrium of the neuronal system. Pyrethroids are also thought to interact with GABA receptors and associated pathways.A pyrethroid sodium channel modifier.