There are several reasons you might notice fewer benefits from your allergy medications, and it might take a visit with a healthcare professional to figure out what’s going on, says William Reisacher, MD, an otolaryngic allergist at Weill Cornell Medicine and NewYork-Presbyterian Hospital in New York City.
This includes medications such as:
- betamethasone (Nasacort)
- cetirizine (Zyrtec)
- fexofenadine (Allegra)
- fluticasone (Flonase)
- oxymetazoline (Afrin)
Here are some of the most likely culprits.
You’ve Developed a Medication Tolerance
Your body can get used to certain allergy medications over time. When that happens, a typical dose won’t bring you the relief it used to, and you’ll need more to produce the same effect.
It doesn’t take long for this to happen, either. You can develop a tolerance to over-the-counter decongestant sprays, such as oxymetazoline (Afrin), in as little as three to five consecutive days of use, Dr. Reisacher says.
You Have Rebound Congestion
Overusing decongestant nasal sprays, such as oxymetazoline (Afrin), can also lead to a type of nasal congestion due to inflammation in your nasal passages called rebound congestion (or rhinitis medicamentosa).
You Have New or Worsening Allergies
Something about your allergies themselves may have changed. You could have exposure to new allergens, such as an air quality issue in your home or construction kicking up dust and debris in your neighborhood, Reisacher says.
Or, your symptoms might be worse due to an exceptionally problematic pollen season. You’re not imagining things: Climate change is causing plants to produce roughly 20 percent more pollen than 50 years ago, making seasonal allergy symptoms more severe and extending the allergy season. “The way your brain will interpret that is ‘The medications I’ve been using are no longer working,’” he says.
You’ve Gotten Older
Some people find their allergies worsen or return with age, or they develop new allergies as they get older.
Older adults are also more likely to take other medications. Some of these, including aspirin and ibuprofen (Advil), may interfere with how well allergy medications perform, making you feel like your usual meds don’t work as well, Reisacher adds.
You’re Under a Lot of Stress
Stress might also change your perception of your symptoms. “When you’re under a lot of emotional or physical stress, you might perceive a symptom as being more significant in your life, whereas, if you’re maybe on vacation in the Bahamas, and you get that stuffy nose, you’re not even really caring about it anymore,” Reisacher says. Either way, your meds may not feel as effective because of stress.
You Don’t Just Have Allergies
You’re Not Taking Your Meds as Directed
If you’re not getting relief, double-check that you’re following instructions. “For example, a main reason for loss of effect is that people may not be taking the drugs as directed,” Dr. Greenhawt says.
Some estimates suggest most people with allergy symptoms don’t stick with their treatment plans: Anywhere from 35 to 70 percent don’t take their medication the way their doctor recommended or according to the product’s label.
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