Can Allergy Drops Treat Multiple Allergies at Once?
Yes — and this is the main practical advantage of custom sublingual immunotherapy over FDA-approved tablets. Most allergy sufferers react to several triggers (say pollen, dust mites, and a pet), but each FDA-approved sublingual tablet treats only one allergen. Custom-compounded sublingual drops can combine several of your confirmed allergens into a single daily dose, which is why they are used for people with multiple sensitivities. The trade-off is regulatory, not clinical: custom multi-allergen drops are prescribed off-label, while single-allergen tablets carry FDA approval.
3 peer-reviewed sources
Yes. Custom sublingual immunotherapy drops can combine multiple confirmed allergens into one daily treatment, which is why they're used for people allergic to several things — unlike FDA-approved tablets, which each treat a single allergen.
Medically reviewed by Dr. Chet Tharpe, M.D. · Last reviewed August 2026
Key facts
Each FDA-approved sublingual tablet covers a single allergen category: grass (Grastek; Oralair is a five-grass mix), ragweed (Ragwitek), or house dust mite (Odactra) — none combines different allergen categories.
Polysensitization is common — a large share of allergic-rhinitis patients are sensitized to more than one allergen, making single-allergen products an incomplete fit for many.
In a real-world study of 2,897 patients on personalized (multi-allergen) sublingual immunotherapy delivered by telemedicine, clinically meaningful improvement rose from 28% at 12 months to 45% at 24 months.
Why multiple allergies change the treatment choice
Allergen immunotherapy only works against the specific allergens it contains. That's fine if you react to a single trigger — but most people don't. Someone with year-round symptoms is often sensitized to a combination such as dust mites, a pet, and one or two pollens. This is where the two forms of sublingual immunotherapy diverge. FDA-approved tablets are each formulated for a single allergen category, so covering several different triggers would mean stacking multiple products, which isn't how they're designed or studied. Custom-compounded sublingual drops, by contrast, are mixed from your confirmed allergen extracts — several allergens in one prescription, one dose under the tongue each day. The first step either way is confirming exactly what you react to with allergy testing, so the formula matches your real sensitization profile rather than guesswork.
Single-allergen tablets suit single-allergen patients; custom multi-allergen drops exist precisely for the common case of several triggers at once.
How a multi-allergen formula is built
A personalized drop formula is compounded from FDA-regulated allergen extracts — the same class of extracts allergists use for shots — selected to match the allergens confirmed on your test results and dosed to build tolerance gradually.
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Curex's allergy drops are taken under the tongue at home, daily — for a flat $79/month, with no needles and no routine clinic visits.
Allergy drops are compounded at a specialty pharmacy for each patient, and the FDA does not review compounded products for safety or efficacy.
See if allergy drops are right for youFrequently asked questions
Can one treatment cover pollen, dust mites, and pet allergies together?
Custom sublingual immunotherapy drops can be compounded to include several confirmed allergens in one daily dose, so pollen, dust mites, and pet dander can be addressed together. FDA-approved tablets can't — each treats a single allergen category.
Why aren't there FDA-approved multi-allergen tablets?
The approved sublingual products were each studied and licensed for one allergen (grass, ragweed, or dust mite). Combining multiple allergens is done through compounding, which is prescribed off-label rather than sold as an approved fixed product.
Is a multi-allergen drop as effective as treating one allergen?
Immunotherapy works against the allergens it contains, so covering your actual triggers is what matters. Real-world data on personalized multi-allergen sublingual immunotherapy shows meaningful symptom improvement that grows with treatment time.
How do I know which allergens I actually need treated?
Allergy testing — a skin-prick test or a specific IgE blood test — identifies which allergens are driving your symptoms, so the formula targets confirmed sensitivities rather than everything you might be exposed to.
Who should see an allergist in person first?
If you have a history of anaphylaxis, poorly controlled asthma, or suspected food or drug allergy, get an in-person evaluation before starting immunotherapy of any kind.
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Read moreQuestions about Curex itself?
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Treat your allergies — drops under the tongue.
Curex allergy drops are a personalized sublingual extract, prescribed by a board-certified allergist and shipped to your door — taken daily at home with no needles and no routine clinic visits. From $79/month. HSA/FSA eligible.
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Allergy drops are compounded at a specialty pharmacy for each patient, and the FDA does not review compounded products for safety or efficacy.
- 1Allergen Extract Sublingual Tablets. U.S. Food and Drug Administration, Center for Biologics Evaluation and Research.
- 2Tharpe C, Davidson J, Mardaga K, et al. Real-world outcomes of personalized sublingual immunotherapy delivered through a telemedicine platform. Front Allergy. 2026;7:1865860.
- 3Allergy shots and sublingual immunotherapy. American Academy of Allergy, Asthma & Immunology (AAAAI).
This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. Content reviewed by board-certified allergists at Curex.
Allergy drops are compounded at a specialty pharmacy for each patient, and the FDA does not review compounded products for safety or efficacy.
The only FDA-approved sublingual immunotherapy products are tablets — Grastek, Oralair, Ragwitek, and Odactra — which are different from Curex drops.