Cetirizine · Medicine question

Does cetirizine pass into breast milk?

iatroX medicinesPublished 8 November 2026

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Cetirizine passes into breast milk at 25%–90% of plasma concentrations, depending on sampling time after administration; side effects in breastfed infants cannot be excluded, so caution is advised when prescribing to breastfeeding women.

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Zirtek Allergy 10 mg film-coated TabletsUCB Pharma Limited · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 14Document updated 4 January 2023

Sources checked 8 November 2026

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