Can You Take Allergy Medicine While Pregnant?

The short answer is: yes, you can take certain allergy medicines while pregnant, but only under the guidance of your healthcare provider. For most pregnant women in the US, the first-line options include second-generation antihistamines like loratadine (Claritin) and cetirizine (Zyrtec), which have large safety databases showing no increased risk of birth defects. However, the safest approach is to first identify exactly what you’re allergic to — and that starts with an allergy blood test rather than guessing or relying on over-the-counter medications alone.

Why Knowing Your Allergens Matters During Pregnancy

Pregnancy changes your immune system, and allergies can worsen, improve, or stay the same. Instead of reaching for random antihistamines, an allergy blood test (also called IgE antibody testing) can pinpoint your specific triggers — whether it’s pollen, dust mites, pet dander, or certain foods. This targeted approach helps you and your doctor choose the safest, most effective plan.

Common Allergy Medicines: What’s Considered Low-Risk?

According to the American College of Obstetricians and Gynecologists (ACOG) and the FDA, the following medications are generally considered acceptable during pregnancy when used as directed:

• Loratadine (Claritin) — second-generation antihistamine, non-drowsy, large safety database
• Cetirizine (Zyrtec) — similar profile, also non-drowsy
• Diphenhydramine (Benadryl) — first-generation, use only short-term due to sedation
• Intranasal corticosteroids (e.g., fluticasone) — minimal systemic absorption
• Saline nasal sprays — no medication, safe for daily use

Note: Always consult your healthcare provider before taking any medication during pregnancy.

Comparison of Antihistamine Options for Pregnancy

Medication	Category	Common Brand	Pregnancy Safety Rating
Loratadine	Second-gen antihistamine	Claritin	Generally low-risk
Cetirizine	Second-gen antihistamine	Zyrtec	Generally low-risk
Diphenhydramine	First-gen antihistamine	Benadryl	Use short-term only
Fexofenadine	Second-gen antihistamine	Allegra	Less data, consult doctor

The Role of Allergy Blood Testing in Pregnancy

What Is an Allergy Blood Test?

An allergy blood test measures the level of specific IgE antibodies in your blood in response to common allergens. It’s a safe, needle-based test that can be done at any point during pregnancy. Unlike skin prick tests, there is no risk of triggering a systemic reaction, making it ideal for expectant mothers.

How It Helps You and Your Baby

By identifying your triggers through IgE antibody testing, you can avoid unnecessary medications. For example, if your seasonal allergy testing shows a high reaction to ragweed, you can focus on avoiding outdoor exposure during peak times rather than taking daily pills. If a food allergy panel reveals a sensitivity to dairy, you can adjust your diet instead of relying on antihistamines.

Natural Alternatives and Lifestyle Adjustments

While medication can help, many pregnant women prefer non-drug options first:

• Use a HEPA air purifier in the bedroom
• Shower and change clothes after being outdoors
• Apply saline nasal rinses to flush out allergens
• Keep windows closed during high pollen counts
• Wear a mask while gardening or cleaning

These strategies reduce your exposure to allergens and lower the need for medication. If you still need relief, your doctor can recommend the safest option based on your allergen screening results.

Immunotherapy and Pregnancy

If you were already receiving immunotherapy (allergy shots) before becoming pregnant, most allergists recommend continuing at a maintenance dose. However, starting immunotherapy during pregnancy is not advised due to the small risk of anaphylaxis. An at-home allergy test can help you identify triggers before considering immunotherapy after delivery.

When to Call Your Doctor

Seek medical advice if you experience severe allergy symptoms such as difficulty breathing, swelling, or hives. Also, if you have a history of asthma or nasal polyps, your allergy management may need special attention during pregnancy. An allergy blood test can provide a clear baseline for your care team.

Take Control of Your Allergy Health Today

Understanding your allergies during pregnancy doesn’t have to be guesswork. A comprehensive allergy blood test panel from Allergy Panels can identify your triggers from the safety of your home. With fast, lab-certified results, you and your doctor can make informed decisions about medication and avoidance strategies. Order your allergy blood test online today and get the clarity you need for a healthier pregnancy.