Skip to content

Allergies Health Center

Select An Article

Mast Cell Inhibitors for Allergy Symptoms

    Font Size

    Cromolyn sodium (Nasalcrom, Crolom), a mast cell inhibitor, is used to prevent allergic symptoms like runny nose or itchy eyes. Cromolyn sodium must be started 1-2 weeks before pollen season and continued daily to prevent seasonal allergy symptoms. The response is not as strong as that of corticosteroid nasal sprays.

    • How mast cell inhibitors work: These drugs prevent the release of histamine and other chemicals that cause allergic symptoms from mast cells when an individual comes into contact with an allergen like pollen.
    • Who should not use these medications: Individuals who are allergic to any components of the nasal spray or eye drops should not take mast cell inhibitors.
    • Use: Frequent dosing is necessary, since the effect only lasts up to 8 hours. Mast cell inhibitors are available as nasal sprays to prevent runny nose or eye drops for itchy eyes.
    • Drug or food interactions: Since these drugs have little or no effect beyond the area applied, they are unlikely to interact with other drugs.
    • Side effects:Contact lenses should not be worn if using eye drops. Eye drops may cause stinging, burning, redness, and, possibly, severe swelling of eyes. Nasal congestion, sneezing, itching, nosebleeds, and burning have been reported with use of cromolyn sodium nasal sprays.

    Recommended Related to Allergies

    Does Your Child Have a Cold, or Is it Allergies?

    For a week, you've wiped your preschooler's runny nose all day long, then listened to her cough in her sleep all night. She's been looking and feeling miserable, and you want to help her get better, but you aren't sure exactly how to categorize her symptoms. Is it a cold, or does she have allergies? You aren't alone; many parents are confused about the proper way to treat a coughing, sneezing child, because colds and allergies often have overlapping symptoms. “I think most parents want a checklist,...

    Read the Does Your Child Have a Cold, or Is it Allergies? article > >

    WebMD Medical Reference from eMedicineHealth

    Reviewed by Luqman Seidu, MD on May 04, 2014
    Next Article:

    Today on WebMD

    man blowing nose
    Make these tweaks to your diet, home, and lifestyle.
    Allergy capsule
    Breathe easier with these products.
     
    cat on couch
    Live in harmony with your cat or dog.
    Woman sneezing with tissue in meadow
    Which ones affect you?
     

    blowing nose
    Article
    woman with sore throat
    Article
     
    lone star tick
    Slideshow
    Woman blowing nose
    Slideshow
     

    Send yourself a link to download the app.

    Loading ...

    Please wait...

    This feature is temporarily unavailable. Please try again later.

    Thanks!

    Now check your email account on your mobile phone to download your new app.

    cat lying on shelf
    Article
    Allergy prick test
    VIDEO
     
    Man sneezing into tissue
    Assessment
    Woman holding feather duster up to face, twitching
    Quiz