Can a pregnant woman safely take cetirizine (Xyzal)?

Can a Pregnant Woman Take Xyzal?

Xyzal (levocetirizine) should be avoided during pregnancy, particularly in the first trimester, due to limited safety data; instead, use cetirizine or loratadine, which have extensive safety records and are recommended as first-line antihistamines during pregnancy. 1, 2

Critical Clarification: Xyzal is NOT Cetirizine

• Xyzal contains levocetirizine, which is the active enantiomer of cetirizine—these are different medications 1
• Levocetirizine has significantly less safety data in pregnancy compared to cetirizine 1
• The FDA drug label for Xyzal specifically states: "if pregnant: ask a health professional before use" 3

Preferred Antihistamine Options During Pregnancy

First-line choices with robust safety data:

• Cetirizine (NOT Xyzal) and loratadine are the recommended first-line antihistamines throughout pregnancy, including the first trimester 4, 2, 5
• Both are FDA Pregnancy Category B, indicating no evidence of fetal harm in animal studies and reassuring human data 4, 2
• Multiple large cohort studies (228-1,287,668 pregnancies) demonstrate no increased risk of major malformations, spontaneous abortion, preterm birth, or low birth weight with cetirizine use 6, 7, 8, 9
• Cetirizine exposure during the first trimester (when organogenesis occurs) showed major malformations in only 2/41 live births, consistent with background rates 6

Alternative first-generation antihistamine:

• Chlorpheniramine is preferred among first-generation agents due to its longest safety record and most robust observational data 10, 2

Why Levocetirizine (Xyzal) Should Be Avoided

• The American Academy of Allergy, Asthma, and Immunology specifically recommends avoiding levocetirizine during the first trimester due to insufficient safety data 1
• Unlike cetirizine, levocetirizine lacks the extensive pregnancy registries and cohort studies that establish safety 1
• The first trimester is the most critical period for medication-induced congenital malformations due to organogenesis 1, 2

Treatment Algorithm for Allergic Symptoms in Pregnancy

Step 1: Non-pharmacologic approaches first 11

• Hypertonic saline nasal rinse for rhinitis symptoms 11
• Avoidance of known allergen triggers

Step 2: If medication needed, choose based on trimester:

First trimester (most critical):

• First choice: Cetirizine or loratadine 4, 2, 5
• Second choice: Chlorpheniramine (if sedation acceptable) 10, 2
• Avoid: Levocetirizine (Xyzal), hydroxyzine 1, 2

Second and third trimesters:

• Continue cetirizine or loratadine 2
• May add intranasal budesonide for moderate-severe symptoms 4, 2

Step 3: For inadequate response:

• Combine cetirizine or loratadine with intranasal corticosteroids (budesonide preferred, FDA Category B) 4, 2
• Consider montelukast (FDA Category B) if favorable pre-pregnancy response 4

Critical Medications to Avoid

• Hydroxyzine: Specifically contraindicated in early pregnancy based on animal data 1, 2
• Oral decongestants (phenylephrine, pseudoephedrine): Avoid in first trimester due to associations with gastroschisis and small intestinal atresia 4, 1, 10
• Levocetirizine (Xyzal): Insufficient safety data 1
• Never combine decongestants with acetaminophen or salicylates, as this increases malformation risk 4, 10

Common Pitfalls to Avoid

• Assuming all antihistamines have equivalent safety profiles—they do not, and specific agents like levocetirizine and hydroxyzine must be avoided 1, 2
• Confusing cetirizine with levocetirizine (Xyzal)—these are different medications with vastly different amounts of pregnancy safety data 1
• Using oral decongestants during organogenesis (first trimester), which carries teratogenic risk 4, 1, 10

Practical Recommendation

If a pregnant woman is currently taking Xyzal, switch to cetirizine 10 mg daily or loratadine 10 mg daily, both of which have extensive safety data from large cohort studies and pregnancy registries demonstrating no increased risk of adverse fetal outcomes. 6, 7, 8, 9, 12, 13