Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier
WebMD

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine
WebMD

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion
    WebMD

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community
    WebMD

    Community

    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Allergies Health Center

Select An Article

Mast Cell Inhibitors for Allergy Symptoms

Font Size
A
A
A

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.

  • H ow 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.
  • W ho 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 Honey Help Prevent Allergies?

In every issue of WebMD the Magazine, we ask experts to answer readers' questions about a wide range of topics, including some of the most cherished medical myths out there. For our March/April 2012 issue, we talked to Michael Palumbo, MD, an allergist with Allergy & Clinical Immunology Associates in Pittsburgh, about the popular idea that honey helps prevent allergies. Q: Can local honey help my allergies? A: No. The theory that taking in small amounts of pollen by eating local honey...

Read the Does Honey Help Prevent 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