A member asked:

Once permethrin is applied, how long is it before treatment?

A doctor has provided 1 answer
Dr. Peterson Pierre answered

Specializes in Dermatology

Permethrin: This is usually applied and left on overnight, washed off in the morning, then repeated in 1 week.

Answered 9/13/2013

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Can i keep nix (permethrin) lice treatment on overnight?

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