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Permethrin is a pyrethroid insecticide. Pyrethroids are synthetic compounds made to mimic the pyrethrins that are isolated from chrysanthemum flowers. It is a broad-spectrum insecticide that works by interfering with a nerve cell's ability to send a normal signal by jamming open tiny gates on the cell that need to open and close rapidly to carry the message. Permethrin is used in agriculture, in public health mosquito control, and in residential settings. Products containing permethrin are also used on pets and on clothing.

General Questions about Permethrin

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Fact Sheet

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Precautions for Using Spot-on Flea and Tick Products

(2:38 min., 4.95MB)

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Synthetic Pyrethroids and Paresthesias
Medical Case Profile

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What should I do during mosquito spraying?
Q & A

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What should I do during mosquito spraying?

(1:39 min., 1.50MB)

If you have questions about permethrin, or any pesticide-related topic, please call NPIC at 1-800-858-7378 (8:00am - 12:00pm PST), or email at npic@ace.orst.edu.

Last updated October 10, 2012

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