Permethrin (NRDC-143) is an insecticide, acaricide and a high selectively inhibitor of the Mitochondrial complex I, found in sediment and water samples. Permethrin shows estrogenic in vivo and anti-estrogenic activity in vitro. Permethrin also acts as a neurotoxin affecting neuron membranes by prolonging Sodium channel activation. Permethrin decreases resistance to bacterial infections in medaka (Oryzias latipes)[1][2][3][4][5][6][7].