Can you take fexofenadine while breastfeeding?
What LactMed says
The National Library of Medicine’s own summary, quoted in full. We do not write a verdict of our own on this question, and we do not compress theirs into a label.
Because of its lack of sedation and low milk levels, maternal use of fexofenadine would not be expected to cause any adverse effects in breastfed infants. Fexofenadine might have a negative effect on lactation, especially in combination with a sympathomimetic agent such as pseudoephedrine.
Quoted from Fexofenadine — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised September 15, 2025.
What LactMed would consider instead
LactMed ends this record by naming the drugs it would consider in place of fexofenadine. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.
How much fexofenadine gets into breastmilk
Fexofenadine is an active metabolite of terfenadine.
Maternal Levels. Milk levels have not been measured after fexofenadine administration. However, after 60 mg every 12 hours orally of its parent compound, terfenadine, peak steady-state fexofenadine milk levels averaged 41 mcg/L (range 23 to 60 mcg/L). Based on the data on drug passage into breastmilk in this study and the typical serum levels found after fexofenadine administration, an exclusively breastfed infant would receive less than 0.1% of the weight-adjusted maternal dosage of fexofenadine.
Infant Levels. Relevant published information was not found as of the revision date.
What has been seen in breastfed infants
In one telephone follow-up study of 25 infants exposed to the fexofenadine's parent drug terfenadine, 3 mothers reported irritability in their infants. None of the reactions required medical attention.
Effects on milk supply
Antihistamines in relatively high doses given by injection can decrease basal serum prolactin in nonlactating women and in early postpartum women. However, suckling-induced prolactin secretion is not affected by antihistamine pretreatment of postpartum mothers. Whether lower oral doses of antihistamines have the same effect on serum prolactin or whether the effects on prolactin have any consequences on breastfeeding success have not been studied. The prolactin level in a mother with established lactation may not affect her ability to breastfeed.
Frequently asked questions
Can you take fexofenadine while breastfeeding?
Because of its lack of sedation and low milk levels, maternal use of fexofenadine would not be expected to cause any adverse effects in breastfed infants. The full record is quoted on this page, and the decision is one to make with the person who prescribed it — LactMed itself states it is not a substitute for professional judgement.
What can I take instead of fexofenadine while breastfeeding?
LactMed lists Cetirizine, Desloratadine, Levocetirizine, Loratadine as alternate drugs to consider. That is the database's own list for this drug — whether any of them suits you depends on what you are treating.
Does fexofenadine pass into breastmilk?
LactMed's measured drug levels for fexofenadine are quoted in full on this page, under "How much gets into breastmilk".
Do I need to pump and dump after taking fexofenadine?
LactMed does not frame its records that way — it reports measured drug levels in milk and what has been observed in breastfed infants, which is what this page quotes. "Pump and dump" advice for a specific drug and dose should come from your clinician or a pharmacist, not from a general rule.
More on fexofenadine
LactMed states that the information it presents is not a substitute for professional judgement, and that you should consult your healthcare provider for breastfeeding advice related to your particular situation. Nothing on this page is medical advice.