Head lice infestation can sometimes affect the entire family. When a child is infected, they can easily pass them on to her siblings and eventually to the entire household. Lice are very easy to pick up through contact with clothes, bedding and linen as well as towels. So if your child has got head lice, it is best to treat the entire family. Parasidose Treatment Care uses the active ingredient Biococidine, a non-toxic insecticide making it safe and effective in treating head lice and nits for the entire family.