When you buy KP24 for headlice on children, the active ingredient is maldison, wouldnt that make it safe to use. I have used maldison in my house for fleas but i just sprayed the carpet before i went to work so that it had dried long before i got home. As soon as i got home I vacuumed. I also used a natural one but found that it didnt help till after i used the maldison, to keep them away.