beth israel deaconess medical center a harvard medical school teaching hospital

To find a doctor, call 800-667-5356 or click below:

Find a Doctor

Request an Appointment

left banner
right banner
Smaller Larger

Cromolyn Sodium

Nasal Spray

Cromolyn (sodium cromoglycate), sprayed into the nose, reduces symptoms of seasonal allergies by interrupting the release of symptoms triggers such as histamines and leukotrienes.

Most Effective If Start Using Before Symptoms Develop

Cromolyn sprays are most effective when started early in the season, before symptoms develop. If allergic symptoms are present already, cromolyn is not as effective as steroid sprays. Cromolyn sprays also must be used three to four times a day, since the protective effect lasts only about four to eight hours.

Side Effects

In general, side effects of cromolyn are minor and do not last long. In studies, the side effects most often mentioned are sneezing, stinging or burning sensation in the nose, and, very rarely, nosebleed.

Contact Information

Allergy and Inflammation - Research
Department of Medicine
Beth Israel Deaconess Medical Center
Center for Life Science, 9th floor
330 Brookline Avenue
Boston, MA 02215
617-723-4110
617-735-4115