licid lotion to kill and prevent hair insects. licid is a compound lotion that contains pyrethrins, which are substances extracted from flowers belonging to the chrysanthemum genus. Its method of action is similar to the insecticide called dichlorodiphenyltrichloroethane, as it opens sodium channels located on the membranes Nervous system for lice, which stimulates the nerve cell and increases the activity of the nervous system, which leads to convulsions in the lice and then death. It contains piperonyl butoxide, which increases the effectiveness of pyrethrins by reducing their metabolism within the lice.