Can you take phenylephrine 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.
The oral bioavailability of phenylephrine is negligible, so the drug is unlikely to reach the infant. However, intravenous or oral administration of phenylephrine might decrease milk production. An alternate drug may be preferred, especially while nursing a newborn or preterm infant.
Phenylephrine nasal spray or ophthalmic drops are less likely to decrease lactation. To substantially diminish the effect of the drug after using eye drops, place pressure over the tear duct by the corner of the eye for 1 minute or more, then remove the excess solution with an absorbent tissue.
Quoted from Phenylephrine — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised April 15, 2026.
What LactMed would consider instead
LactMed ends this record by naming the drugs it would consider in place of phenylephrine. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.
How much phenylephrine gets into breastmilk
Maternal Levels. Relevant published information was not found as of the revision date.
Infant Levels. Relevant published information was not found as of the revision date.
What has been seen in breastfed infants
Relevant published information was not found as of the revision date.
Effects on milk supply
Relevant published information in humans was not found as of the revision date. However, animal data indicate that phenylephrine can decrease milk production and pseudoephedrine, a pharmacologically similar vasoconstrictor, decreases milk production in nursing mothers after oral use.
Frequently asked questions
Can you take phenylephrine while breastfeeding?
The oral bioavailability of phenylephrine is negligible, so the drug is unlikely to reach the infant. 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 phenylephrine while breastfeeding?
LactMed lists Oxymetazoline 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 phenylephrine pass into breastmilk?
LactMed's measured drug levels for phenylephrine are quoted in full on this page, under "How much gets into breastmilk".
Do I need to pump and dump after taking phenylephrine?
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 phenylephrine
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.