Question: what is the best medicine to kill lice?
Answer: Benzyl alcohol (Ulesfia). This lotion kills active lice, not eggs. ...  Ivermectin (Sklice). This lotion kills most head lice, even just-hatched lice, with just one use. ...  Malathion (Ovide). This very strong lotion paralyzes and kills lice and some lice eggs. ...  Spinosad (Natroba).