If you re wondering how to get rid of lice RID is the brand for you. RID Lice Killing Shampoo is recommended for adults and kids over 2. It s easy to apply to dry hair and rinses clean away leaving no chemical residue behind. Comb through hair after washing to remove remaining lice eggs and tangles. Repeat with a second treatment 7-10 days later. Read product label for complete directions for use. RID combines piperonyl butoxide and pyrethrum extract to remove lice and their eggs. RID Lice Killing Shampoo is available in 3 sizes: 2-ounce 4-ounce and 8-ounce bottles or as part of RID Treatment Kits. Choose the amount that s right for your hair length: more hair more shampoo. With RID lice treatment you can say goodbye to the embarrassing itchy nuisance of head lice and put your best foot forward.