Dandruff shampoos are primarily designed to treat and manage dandruff, which is caused by an overgrowth of yeast on the scalp. While they may contain active ingredients that can help reduce the symptoms of dandruff, they are not specifically formulated to kill lice.

Lice are parasitic insects that infest the scalp and feed on human blood. To effectively eliminate lice, it is important to use products specifically designed to target and kill these parasites. There are over-the-counter treatments available that contain insecticidal ingredients, such as pyrethrin or permethrin, which are effective in killing lice.

If you or someone you know is dealing with a lice infestation, it is recommended to use products specifically formulated to target lice and follow the instructions provided. Additionally, it is important to thoroughly clean and disinfect any personal items that may have come into contact with lice, such as combs, brushes, and bedding, to prevent re-infestation.