Allergy Drops While Pregnant: What to Know About SLIT in Pregnancy
Pregnancy generally is not a time to start allergy drops, but many providers allow an established, well-tolerated course of sublingual immunotherapy to continue without dose increases. The decision is individualized. Because data in pregnancy are limited, a provider weighs your symptom control, history, and comfort before advising whether to continue.
4 peer-reviewed sources
Allergy immunotherapy is usually continued rather than newly started during pregnancy. If you tolerate your drops well, many providers keep the maintenance dose steady, but always confirm the plan with your clinician.
Medically reviewed by Dr. Chet Tharpe, M.D. · Last reviewed June 2026
Key facts
Allergy immunotherapy is generally not initiated during pregnancy because starting involves dose build-up and a small risk of reactions providers prefer to avoid.
Major allergy organizations describe continuing an established, well-tolerated maintenance dose as a reasonable, individualized option during pregnancy.
Dose increases are avoided during pregnancy because raising the dose reintroduces some of the reaction risk of the build-up phase.
There is no evidence that established sublingual immunotherapy harms a baby, but pregnancy-specific data are limited, so guidance is cautious rather than alarmed.
Allergy drops are compounded at a specialty pharmacy for each patient. The FDA does not review compounded products for safety or efficacy. Any decision should be made with both your allergist and obstetric provider.
Allergy Drops and Pregnancy: The General Approach
Sublingual immunotherapy, or allergy drops, involves holding a daily liquid allergen extract under the tongue to gradually reduce allergic sensitivity over time. A common clinical principle, shared by major allergy organizations, is that immunotherapy is not initiated during pregnancy, because starting treatment involves dose build-up and a small risk of reactions that providers prefer to avoid in a new pregnancy. However, if a patient is already on a stable maintenance dose and tolerating it well, many clinicians allow that established course to continue at the same dose rather than stopping it. This framing reflects caution and limited data, not evidence that allergy drops cause harm. It is worth noting that the allergens used are substances the body already encounters in the everyday environment, given in very small amounts by the sublingual route, which is part of why a steady, tolerated dose is generally viewed as low risk. Identifying your specific triggers through testing is the foundation of any immunotherapy plan; Curex offers at-home allergy testing reviewed by a board-certified allergist to pinpoint the IgE triggers behind your symptoms. Because allergy drops are not FDA-approved and are used off-label, and because pregnancy data are limited, any decision should be made together with both your allergist and your obstetric provider.
If you are already established on allergy drops, continuing at a steady dose is often considered reasonable; new starts and dose increases are typically deferred until after pregnancy.
Ready to skip the needles?
See if at-home allergy drops fit your allergies — a 2-minute quiz, designed by board-certified allergists, taken under the tongue daily with no clinic visits.
- AllergistReviewed & prescribed
- $39/moWith insurance
- No needlesUnder the tongue
- HSA/FSAEligible
How the Decision Maps to the Pregnancy Journey
Rather than a single rule, the approach to allergy drops shifts with where you are relative to pregnancy. The phases below describe the general pattern many providers follow. None of it reflects evidence of harm from a tolerated maintenance dose; it reflects caution, limited data, and a preference to avoid the build-up phase during pregnancy. Your allergist and obstetric provider individualize the plan to your history and symptom control.
If you hope to start immunotherapy, many providers suggest beginning and getting through the build-up phase before conceiving when possible, so you reach a stable maintenance dose ahead of pregnancy. Confirming your triggers early supports this timing.
New starts and dose increases are typically deferred. If you are already established and tolerating treatment, many clinicians allow continuing at the same dose. Contact your allergist promptly once you learn you are pregnant so the plan can be reviewed.
Once pregnancy considerations no longer apply, deferred starts or dose adjustments can be revisited. Decisions during breastfeeding are again individualized with your care team.
No needles. No clinic visits.
Curex's allergy drops are taken under the tongue at home, daily — from $39/month with insurance (or $99/month self-pay), 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 I start allergy drops while pregnant?
Most providers do not begin a new course of allergy immunotherapy during pregnancy. Starting treatment requires a dose build-up phase, and that period carries the highest chance of reactions, so clinicians generally prefer to wait until after pregnancy to initiate. This is a precautionary approach rather than evidence that the drops are harmful. If you are interested in immunotherapy and are pregnant or trying to conceive, talk with your allergist about timing. Where it is feasible, some providers suggest starting before conception so that you can complete build-up and reach a stable maintenance dose ahead of pregnancy. Managing symptoms in the meantime with measures your obstetric provider approves, and planning to start treatment later, is a common and reasonable path.
Is it safe to continue allergy drops during pregnancy?
If you are already on a stable maintenance dose and tolerating it well, many providers consider it reasonable to continue allergy drops without increasing the dose, but this is an individualized decision. Pregnancy-specific data are limited, so the guidance is cautious rather than definitive. Your allergist and obstetric provider will weigh how well your symptoms are controlled, your reaction history, and your preferences. Some patients choose to pause and resume later for peace of mind. There is no single rule that fits everyone, which is why a personalized conversation with your care team is essential before deciding.
Do allergy drops affect the baby?
There is no evidence that established sublingual immunotherapy causes harm to a baby, but the data in pregnancy are limited, so claims either way should be cautious. This uncertainty, rather than known harm, is the reason providers tend to avoid starting new treatment and avoid dose increases during pregnancy. A steady maintenance dose in someone who already tolerates it is generally viewed as low risk, partly because the allergens involved are substances the body already encounters in everyday life, given in very small amounts under the tongue. Because every pregnancy is different, the safest course is to discuss your specific situation with both your allergist and your obstetric provider rather than relying on general statements. They can review your dose, your tolerance, and your overall health and tell you whether continuing fits your individual circumstances.
Should I stop allergy drops if I become pregnant?
Not necessarily. Many providers allow patients on a stable maintenance dose to continue allergy drops through pregnancy, while others may prefer pausing depending on your history and comfort. The key is not to make the decision alone. Contact your allergist as soon as you learn you are pregnant so they can review your dose, your tolerance, and your symptom control with your obstetric provider. Avoid increasing your dose during this time. Whatever you decide, keeping your care team informed ensures the plan fits both your allergy management and your pregnancy.
Will pregnancy make my allergy symptoms worse?
Pregnancy can change allergy symptoms in either direction. Hormonal shifts and increased blood volume can cause nasal congestion, sometimes called pregnancy rhinitis, which may feel similar to allergies, and some people find their allergies feel more intense. Others notice little change. Because some allergy medications are managed differently in pregnancy, work with your obstetric provider on symptom relief rather than self-treating. If you are on immunotherapy, your allergist can advise whether to continue. Tracking your symptoms and triggers helps your care team tailor a plan that keeps you comfortable safely.
Why are dose increases avoided during pregnancy?
Dose increases are generally avoided in pregnancy because raising the dose reintroduces some of the same risk that the build-up phase carries, namely a higher chance of a reaction, which providers prefer not to add during pregnancy. Holding the dose steady at a level you already tolerate keeps the situation predictable. This is a conservative, precautionary practice rather than a sign that a higher dose is known to be dangerous, since pregnancy-specific data are limited. If your symptoms worsen during pregnancy, the solution is usually to manage them with measures your obstetric provider approves rather than to escalate the immunotherapy dose. Always coordinate any change with both your allergist and your obstetric provider so the plan stays consistent.
Related Articles
Are Allergy Drops Effective? Understanding the Evidence Quality
Are allergy drops effective? Yes, backed by over 100 clinical studies. We explain what the evidence shows and why it matters more than one number.
Read moreHow To Get Allergy Drops: A Step-by-Step Guide
How to get allergy drops: complete allergy testing, get an allergist review, and receive a personalized extract shipped to your home. Step-by-step guide.
Read moreDo Allergy Drop Results Last After You Stop?
Do allergy drop results last after stopping? A completed SLIT course is disease-modifying and may provide lasting relief, though benefit can vary.
Read moreAllergy Drops While Breastfeeding: What the Evidence Suggests
Allergy drops while breastfeeding: the provider-led decision, why data are limited, and how continuing or starting sublingual immunotherapy is approached.
Read moreHow Do Allergy Drops Work? The Immunology of SLIT
How do allergy drops work? Under the tongue, immune cells sample the allergen and shift the body toward tolerance via Treg cells and IgG4 antibodies.
Read moreAllergy Drops While Sick: When to Pause Dosing
Should you take allergy drops when sick, with a fever or mouth sores? General guidance on when to keep dosing and when to pause your doses.
Read moreTreat 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 $39/month with insurance, or $99/month self-pay. HSA/FSA eligible.
From $39/mo with insurance · No needles · HSA/FSA eligible · Cancel anytime
Allergy drops are compounded at a specialty pharmacy for each patient, and the FDA does not review compounded products for safety or efficacy.
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.