Is There An Effective New Option to Treat Head Lice?

Head lice are mostly an irritant rather than a serious health issue, but infestations affect millions of people yearly, and lice are increasingly resistant to existing treatments. In the past, over-the-counter treatments contained insecticides (usually synergized pyrethrin or synthetic pyrethroid (permethrin)) that target the neurologic system of the adult louse. These compounds do not affect …