Table of Contents > Drug > Permethrin Print



Related terms
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    Related terms
    • Brand Names: U.S.: A200® Lice [OTC];Nix® Complete Lice Treatment System [OTC];Nix® Creme Rinse Lice Treatment [OTC];Nix® Creme Rinse [OTC];Nix® Lice Control Spray [OTC];Rid® [OTC]
    • Brand Names: Canada: Kwellada-PT;Nix®

    • It is used to treat lice.
    • It is used to treat scabies.
    • Permethrin harms the insects and treats the infection.


    How to take

    • Follow how to use carefully.
    • Spray:
    • Do not use on people or animals.
    • For use on non-washable items only.
    • Spray on infested part and let dry all the way.
    • Vacuum rugs and carpets. Throw away vacuum cleaner bags after use.
    • All other products:
    • Follow how to take this drug as you have been told by your doctor. Do not use more than you were told to use.
    • Do not take this drug by mouth. Use on your skin only. Keep out of your mouth, nose, and eyes (may burn).
    • Wash your hands before and after use.
    • Clean affected part before use. Make sure to dry well.
    • Wash all bedding, towels, and recently worn clothes in hot water or have them dry cleaned.
    • Cream:
    • Put a thin layer on the skin from the neck to the toes. Put in the skin folds, creases, and spaces between the fingers and toes.
    • Put under fingernails.
    • Trim fingernails short.
    • Put cream under nails with a toothbrush. Throw away toothbrush after use.
    • Wear light clothing while this drug is on your skin.
    • Do not let your skin touch anyone else's skin while wearing the cream.
    • After 8 to 14 hours, fully wash cream from skin using warm, soapy water.
    • Cream rinse and lotion:
    • Shampoo hair, rinse, and towel dry before use. Use a shampoo without a conditioner.
    • Shake well before use.
    • Lightly coat hair and scalp.
    • Work into hair and scalp gently.
    • Leave on for 10 minutes.
    • Do not cover head while cream rinse or lotion is on hair.
    • After 10 minutes, put a little bit of warm water on hair and lather.
    • Rinse fully.
    • Wash your hands after use.
    • Dry with a towel.
    • Use special nit comb or tweezers to get rid of dead nits (lice eggs) from hair.

    Missed Dose

    • Do not put on 2 doses or extra doses.


    • Store at room temperature. Throw away any part not used after use.



    • Do not use the lotion on infants younger than 2 months of age.
    • If you have an allergy to permethrin, chrysanthemums, or any other part of this drug.
    • Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.


    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • If you have asthma, talk with your doctor. You may have a chance of a very bad infection.
    • Check all drugs you are taking with your doctor. This drug may not mix well with some other drugs.
    • Tell your doctor if you are pregnant or plan on getting pregnant.
    • Tell your doctor if you are breast-feeding.

    Side Effects

    • Itching. Talk to the doctor about what to do.
    • Scalp irritation.
    • Skin irritation.


    • Change in the health problem being treated. Is it better, worse, or about the same?

    Contact a healthcare provider

    • If you think there was an overdose, call your local poison control center or ER right away.
    • Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat.
    • Trouble breathing.
    • A burning or tingling feeling that is not normal.
    • Very bad skin irritation.
    • Any rash.
    • Side effect or health problem is not better or you are feeling worse.

    General Statements

    • If you have a very bad allergy, wear an allergy ID at all times.
    • Do not share your drugs with others and do not take anyone else's drugs.
    • Keep all drugs out of the reach of children and pets.
    • Most drugs may be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.
    • In Canada, take any unused drugs to the pharmacy. Also, visit to learn about the right way to get rid of unused drugs.
    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • Call your doctor for help with any side effects. If in the U.S., you may also call the FDA at 1-800-FDA-1088 or if in Canada, you may also call Health Canada's Vigilance Program at 1-866-234-2345.
    • Talk with the doctor before starting any new drug, including OTC, natural products, or vitamins.
    • Read the package insert for more details.

    Author information
    • Copyright © 1978-2013 Lexi-Comp Inc. All rights reserved.

    Copyright © 2011 Natural Standard (

    The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.

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