Lyclear Creme Rinse is a fast- effective- 10 minute effective treatment for treatment of head lice and their eggs. Lyclear Creme Rinse is used to treat head louse infections. Permethrin (the active ingredient) belongs of a group of medicines called pyrethroids which are anti-parasitic agents. Effective against head lice. 10 minute treatment. Suitable for asthmatics. Contains fine toothed comb. You should carefully read all product packaging and labels prior to use.