Essential Guide: What to Do Before an Allergy Test

You may have been struggling with sneezing, itching, or mysterious sniffles for a while, and you’re ready for some real answers. Knowing what to do before an allergy test is the first step toward getting clarity and feeling better. Our allergists in Glen Mills offers a variety of allergy tests, including skin prick, blood, and food allergy testing, so preparing the right way ensures you get the most accurate results from your appointment with their specialists. 

Why Proper Prep for an Allergy Test Matters

The accuracy of your results heavily depends on how well you prepare. Providence ENT emphasizes that failing to follow pre-test instructions can lead to misleading or inconclusive results, potentially causing you to miss detecting true allergies or be misdiagnosed with false positives.

The Big One: Managing Your Medications

Providence ENT professionals review all your medications, including prescriptions and over-the-counter drugs, before testing. This is because many medications, especially antihistamines, can suppress allergic reactions and affect your skin test results.

Antihistamines: The Main Culprits

Common antihistamines such as cetirizine (Zyrtec), loratadine (Claritin), and fexofenadine (Allegra) usually must be stopped about 3 to 7 days before your test at Providence ENT to allow your skin to react properly. Also, nasal antihistamine sprays and some cold medicines containing antihistamines need to be paused.

Other Medications to Discuss With Your Doctor

Providence ENT specialists also ask about other medications like H2 blockers (famotidine, cimetidine) and certain antidepressants that might interfere with testing; never stop prescribed medications without provider guidance.

Your Guide on What To Do Before an Allergy Test at Providence ENT

• Confirm your appointment details with Providence ENT about a week before to ensure timing and location are correct, and request preparation instructions directly from their office.
• Create a symptom diary noting sneezing, hives, or other reactions leading up to your visit to help your Providence ENT allergist connect symptoms with potential allergens.
• Make a full, updated medication list to bring to your Providence ENT appointment to avoid any confusion.
• Follow medication stop protocols exactly as Providence ENT directs for the most reliable results.
• Wear comfortable, loose-fitting clothing that allows easy access to your arms or back, where skin prick tests are usually conducted.
• Avoid skin lotions, creams, or perfumes on test day—as emphasized by Providence ENT—to prevent interference with skin absorption of allergens.
• Eat normally unless Providence ENT gives specific instructions if food allergy testing is planned.

What to Expect on Test Day at Providence ENT

• The skin prick test involves placing tiny drops of allergen solutions on your skin and lightly pricking the skin. Within 15-20 minutes, any allergic reactions become visible as red, itchy bumps.
• If more testing is needed, such as an intradermal test or a blood test measuring allergen-specific IgE antibodies, Providence ENT has the resources to perform these safely.
• After testing, mild steroid creams may be offered for any itchy bumps, and the appointment concludes with a discussion of the results with your Providence ENT allergist.

Post-Test Care and Follow-Up

We also offer an allergist in Media, PA who you can schedule a follow-up visit to review your results, develop an allergy action plan, and discuss treatment options like medications or immunotherapy. By preparing with guidance from Providence ENT and following these steps, you set yourself up to get clear, accurate answers about your allergies and find the relief you seek.