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A member asked:
How long does permethrin stay active in your system?
A doctor has provided 1 answer
Difficult question: Permethrin is only minimally absorbed into the bloodstream (less than 2%) after topical application, but it is a VERY stable compound with a long half life. The amount absorbed is considered below the toxic level, but it will remain for quite some time (this is based on a study on rats, I could not find human studies). Hope this helps.
Answered 5/4/2018
3.5k views
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