Permethrin

What is it and how does it work?

Permethrin disrupts insect nerve function. Products span structural pest control, mosquito programs, certain animal treatments and treated clothing; medical products are a separate category. NPIC: Permethrin fact sheet explains the underlying ingredient or an example product. An active ingredient is only one part of the finished formulation.

What forms and pests are covered?

Example product forms include liquid, spray, dust / powder, aerosol. Example target groups include mosquitoes, fleas, ticks, crawling insects. These are drawn from different labels and references, not a claim that every product treats every listed pest. Check the label for the exact species, life stage and use site.

How is it used in pest management?

Each use requires its own product label. A clothing product is not a skin repellent, and a household concentrate is not an animal treatment.

Identify the pest, correct food or moisture problems, close entry points where appropriate, and monitor the result. See our integrated pest management guide. A recurring infestation calls for reassessment, not an automatic stronger dose.

What cautions matter?

Cats are especially sensitive to permethrin. Never put a dog-only flea product on a cat. Keep pets away as directed by the label and ask a veterinarian about animal treatments.

Prevent children and pets from contacting stored or applied products. Follow the exact label for protective equipment, ventilation, return intervals, storage and disposal. Do not transfer a pesticide into a drink or food container. Read the label safety guide before selecting a product.

What are its limits?

Products with the same ingredient can be unsuitable for one another's uses. This page covers pest-control background, not treatment of lice or scabies in people.

The same ingredient in a garden, structural, aquatic or pet product does not make those products interchangeable. This page does not verify current Texas registration, recommend a brand or provide dilution rates, placement quantities or a treatment prescription. Manufacturer sources describe example products, not every formulation.

Where should you check before using a product?

Use the label attached to the exact product you intend to use. Confirm its target pest, permitted site and application method. Check any professional-use restrictions and applicable Texas rules. NPIC explains how to read a pesticide label. Older fact sheets remain useful background, but the current product label takes priority.

For suspected human exposure, follow the label's first-aid instructions and contact Poison Control at 800-222-1222. Call 911 for severe symptoms. For suspected pet exposure, contact a veterinarian immediately.

This field guide is educational and does not offer treatment bookings.