Follow the directions below to treat a head lice-infestation in your home. Before applying malathion lotion, remove all clothing. Apply malathion according to label directions, to dry hair until the scalp and hair are wet and thoroughly coated. Have the person put on clean clothing once medication has been applied. After 8-12 hours, thoroughly wash hair.
Many flea combs made for cats and dogs are also effective.
After treatment, check hair and comb with a nit comb to remove nits and lice every 2-3 days. Continue checking for 2-3 weeks until you are sure all lice and nits are gone. If crawling bugs are found 7-10 days after treatment, retreat with the same or different louse medication. Malathion may cause stinging, especially if the scalp has open sores from scratching. Malathion is flammable.