Since pediculicides (medications for treating lice) are usually strong insecticides with potential side effects, it is important to rule out other causes of scratching and skin inflammation.
These pediculicides should not be used on children under two; near broken skin, eyes, or mucous membranes; in the bathtub or shower; by those with allergies, asthma, epilepsy, or certain other medical conditions.
All U.S. Food and Drug Administration (FDA)approved non-prescription pediculicides contain relatively safe and effective pyrethroids.
Pyrethroid pediculicides also usually contain 4 percent piperonyl butoxide.
Experts disagree about the effectiveness and/or safety of pediculicides.