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Benzyl Alcohol


Related terms
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    Related terms
    • Brand Names: U.S.: Ulesfia®;Zilactin®-L [OTC]

    • It is used to treat head lice.
    • It is used to treat cold sores.
    • Benzyl alcohol harms the insects and treats the infection.
    • It eases pain.


    How to take

    • Follow how to use carefully.
    • 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.
    • Liquid:
    • Put a thin layer on the affected part with a cotton swab.
    • Let dry for 15 seconds.
    • Avoid fire, flames, or smoking until dry.
    • Lotion:
    • Do not wet hair before putting on lotion.
    • Cover eyes and face with a towel.
    • Coat hair and scalp.
    • Work into hair and scalp gently.
    • Do not cover head while lotion is on hair.
    • Leave on for 10 minutes.
    • Rinse fully.
    • Use special nit comb or tweezers to get rid of dead nits (lice eggs) from hair.
    • Wash all bedding, towels, and recently worn clothes in hot water or have them dry cleaned.

    Missed Dose

    • Do not put on 2 doses or extra doses.


    • Store at room temperature. Do not freeze.
    • Protect from heat or open flame.



    • Do not give this drug to a newborn.
    • If you have an allergy to benzyl alcohol 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.
    • 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

    • 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.
    • 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.

    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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