Veterinary medications should not be used for treating head lice in children

ANSES. France: Following a recent report of the use of veterinary medications to treat head lice in children, ANSES wishes to emphasise that antiparasitic, insecticide and acaracide treatments intended for pets should never be used on humans, especially children.

Head lice

CDC. US: Adult head lice are roughly 2–3 mm long. Head lice infest the head and neck and attach their eggs to the base of the hair shaft. Lice move by crawling; they cannot hop or fly.
Head lice infestation, or pediculosis, is spread most commonly by close person-to-person contact. Dogs, cats, and other pets do not play a role in the transmission of human lice.
Both over-the-counter and prescription medications are available for treatment of head lice infestations.