Plains
(Kansas, Nebraska, North Dakota, South Dakota)
In this region, trees pollinate from March to May, including oak and cedar. Other trees that can trigger nasal allergy symptoms include alder, birch, maple/box elder, hazelnut, and oak.
Grasses pollinate from late May to July in this region, including quack grass/wheat grass, redtop, brome, orchard grass, and rye grass.
Weeds take over from July through September, including ragweed, plantain, and nettle. Other weeds that can trigger nasal allergy symptoms include water hemp, pigweed, lamb's quarter, Mexican fire bush, and Russian thistle.

Note: Trees, grasses, and weeds do not pollinate at the same time or in the same sequence each year.
Source: Surveillance Data Inc., 2008
Bothered by Seasonal Nasal Allergies?
Ask your doctor if NASONEX® may be able to treat or help prevent most of your seasonal nasal allergy symptoms.
For the treatment of seasonal and perennial nasal allergy symptoms...
NASONEX® is a prescription nasal allergy spray approved for the treatment of seasonal and perennial nasal allergy symptoms in adults and children 2 years of age and older. Taken just once a day as directed by your doctor, NASONEX® helps relieve nasal allergy symptoms. These symptoms are itchy nose, runny nose, sneezing and congestion. NASONEX® helps by treating nasal allergy symptoms caused by dust mites, pet dander, even tree and grass pollen. Improvement can occur within 11 hours of initial treatment (based on studies done in a park during the pollen season and in a controlled pollen exposure room). The maximum benefit of NASONEX® is usually achieved within 1 to 2 weeks.
To help prevent most seasonal nasal allergy symptoms...
NASONEX® is the only prescription nasal spray clinically proven and FDA-approved to help prevent most seasonal nasal allergy symptoms in adults and children 12 years and older in addition to treating them once they occur. To help prevent most seasonal nasal allergy symptoms before they start, begin treatment 2 to 4 weeks before the anticipated start of the pollen season. It is important that you take NASONEX® regularly at the time recommended by your doctor, since its effectiveness depends on regular use.
And treatment of nasal polyps...
NASONEX® is proven effective to treat nasal polyps in patients 18 years and older.
Ask your doctor about NASONEX®
Talk to your doctor or health care professional to see whether NASONEX® is right for you or your child.
Important Safety Information About NASONEX®
Side effects were generally mild and included headache, viral infection, sore throat, nosebleeds, and coughing.
For additional important product information, see the NASONEX® Prescribing Information.
Available by prescription only.
You are encouraged to report negative side effects of prescription drugs to the FDA.
Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.
This site is intended for use by U.S. residents.
NASONEX is a registered trademark of Schering Corp., a subsidiary of Merck & Co., Inc.



