Can Allergy Medication Stop Working? Posted on October 30, 2026 by Goodyear Office Allergies affect an estimated 31.7% of adults and 29.5% of children in the United States. Allergy medication is one effective method to manage your symptoms. Unfortunately, some people notice that their allergy medication becomes less effective after prolonged use. Why Do Allergy Medications Lose Efficacy? There are a few possible causes for this decreased efficacy: Worsening allergies. The severity of your allergies can worsen over time. Higher concentration of allergens in your area. Pollen counts may be higher or lower from year to year. You may also encounter greater levels of dust mites, mold spores, pet dander, etc. A tolerance to medication. In some cases, your body may get used to the medication you’re taking—lessening its effectiveness. Let’s look at a couple of ways you can get more from your medication. Take a Higher Dose A higher dose of medication may be the ticket. Before switching to a higher dose, read the safety instructions on the back of the medication and talk to your allergist to double-check that it’s safe to do so. Some allergy medications can make you drowsy, so make sure you don’t take high doses while driving or operating heavy machinery. Pause or Switch Your Medication You can also try pausing your medication for a week or two. During that week, you could switch to a different type of medication or practice allergen avoidance—where you limit contact with the allergen causing your symptoms. If you switch your medication and the new medication seems to work better, it may be worth making the switch permanent. Managing your allergies often takes a multi-faceted approach. You can combine medication and allergen avoidance with a long-term treatment called immunotherapy, which gradually reduces your sensitivity to an allergen over three to five years. Starting immunotherapy as soon as possible will pave the way to faster symptom relief in the next allergy season. Our specialists can help you find the perfect combination of allergy treatments to get your symptoms under control. Contact Goodyear Office today to schedule an allergy test and treatment consultation. Tips for Choosing a New Pet When You Have AllergiesHow to Picnic With Pollen AllergiesDo You Have a Real Penicillin Allergy? Sources Allergy statistics | AAAAI. (2012). Aaaai.Org. https://www.aaaai.org/About/News/For-Media/Allergy-Statistics