Head lice are becoming resistant to permethrin (Nix)

October 1999

A new Harvard study shows what many frustrated parents and physicians have long suspected...

Head lice are becoming resistant to permethrin (Nix)...and probably OTC pyrethrins such as Rid, Clear, Pronto, etc.

In spite of this bad news, continue to use OTC lice treatments (Nix, Rid, etc) for INITIAL therapy.

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