Trying to Keep Ahead of Lice: A Therapeutic Challenge

C. E. Malcolm, MD, CCFP; J. N. Bergman MD, FRCPC


Skin Therapy Letter. 2006;11(10):1-6. 

In This Article

Permethrin-based Products

Permethrin-based products include over-the-counter (OTC) extracts of natural pyrethrins from chrysanthemums combined with piperonyl butoxide to increase stability and effect. These products are neurotoxic to lice but not ovicidal and even after two treatments viable lice and eggs may remain. These products are contraindicated in patients who are allergic to ragweed, chrysanthemums, or other permethrin products.[5]


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