PEHUEN® 54 SC is an insecticide that mixes two molecules: Fipronil and Thiamethoxam. Fipronil from the phenyl-pyrazole group, a broad-spectrum insecticide that disrupts the insect's central nervous system by blocking the passage of chloride ions through the GABA receptor, which produces hyperexcitation of the insect's muscles and nerves, acting mainly by contact and Thiamethoxam, which is a neonicotinoid antagonist of synaptic receptors, blocks acetylcholine receptors in the synapse process, causing paralysis of the insect.