whether Nyda, Resultz, and Zap are effective for treating head lice

Parents are asking whether Nyda, Resultz, and Zap are effective for treating head lice.

Nyda and Resultz are. They seem to work as well as permethrin.

These products contain oils and/or alcohols to suffocate or dehydrate lice...and are promoted as alternatives to permethrin (Nix, etc) or pyrethrins (R&C, etc).

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