Skip to content

    Children's Vaccines Health Center

    Font Size

    The Nasal Flu Spray: Get the Facts

    What Are the Side Effects?

    They’re usually minor. But when they happen, they may look like flu symptoms. You might get a runny nose, chills, tiredness, headache, congestion, sore throat, and cough. Children might also get fever, muscle aches, wheezing, and tummy pain, vomiting, or diarrhea.

    Call 911 if you have any of the following symptoms. They can be signs of a severe reaction:

    • Hives
    • Swelling of the face and throat
    • Trouble breathing
    • A fast heartbeat
    • Dizziness
    • Weakness

    When Should You Get the Nasal Flu Spray?

    As soon as it’s available -- if possible by October. But you can still get vaccinated any time during flu season, which usually peaks in January or later. Once you use the nasal flu spray, it takes about 2 weeks to start working.

    WebMD Medical Reference

    Reviewed by Melinda Ratini, DO, MS on November 12, 2015
    1 | 2

    Today on WebMD

    Baby getting vaccinated
    Is there a link? Get the facts.
    syringes and graph illustration
    Get a customized vaccine schedule.
    baby getting a vaccine
    Know the benefits and the risk
    nurse holding syringe in front of girl
    Should your child have it?

    What To Know About The HPV Vaccine
    24 Kid Illnesses Parents Should Know
    Nausea and Vomiting Remedies Slideshow
    Managing Immunization Schedules For Kids

    Doctor administering vaccine to toddler
    gloved hand holding syringe
    infant receiving injection

    WebMD Special Sections