Sudafed (pseudoephedrine) passes into breast milk only in small amounts, but it can lower your milk supply: the NIH's LactMed database says a single dose decreases milk production and repeated use seems to interfere with lactation. LactMed says it should not be used if your baby is a newborn and your supply is not yet well established, or if you already have trouble making enough milk. Sudafed PE (phenylephrine) is a different decongestant that may also lower supply when taken by mouth. LactMed recommends oxymetazoline nasal spray, such as Afrin, over oral decongestants while breastfeeding, and the Afrin label says not to use it for more than 3 days.
What does Sudafed do to breast milk?
The issue with Sudafed is mostly your milk supply, not the dose your baby gets. LactMed, the NIH's drugs and lactation database, says the small amounts of pseudoephedrine in breast milk are unlikely to harm a nursing baby, though it may occasionally cause irritability.
The bigger effect is on you. LactMed says a single dose of pseudoephedrine decreases milk production acutely, and repeated use seems to interfere with lactation. LactMed even notes a reported treatment plan that uses pseudoephedrine on purpose to reduce milk supply in mothers who make too much.
- Do not use it if: your baby is a newborn and breastfeeding is not yet well established, or you already have trouble making enough milk. This is LactMed's advice.
- Possible effect on your baby: occasional irritability, per LactMed.
- The Sudafed label: says if you are pregnant or breastfeeding, ask a health professional before use.
Is Sudafed PE any better for breastfeeding?
Not clearly. Read the front of the box: Sudafed PE contains phenylephrine 10 mg, a different decongestant from the pseudoephedrine 30 mg in regular Sudafed Sinus Congestion, according to each product's Drug Facts label.
LactMed says the body absorbs almost none of the phenylephrine you swallow, so it is unlikely to reach your baby. But it also says phenylephrine taken by mouth might decrease milk production, and that a different drug may be preferred, especially while nursing a newborn or preterm baby.
There is a second reason to skip it. In November 2024, the FDA proposed removing oral phenylephrine from the list of approved OTC nasal decongestant ingredients because its review found it is not effective as a decongestant when taken by mouth. The FDA said this was about effectiveness, not safety, and that products with oral phenylephrine can still be sold until it issues a final order. Phenylephrine nasal sprays are not part of this proposal.
What can I use for a stuffy nose while breastfeeding?
A decongestant nasal spray is the option LactMed points to. It says very little oxymetazoline, the active ingredient in Afrin, should reach your baby because it is used in the nose and little gets into your bloodstream. LactMed recommends it over oral decongestants such as pseudoephedrine during breastfeeding. Use it instead of Sudafed or Sudafed PE, not on top of them.
LactMed also says phenylephrine nasal spray is less likely to lower milk supply than phenylephrine pills.
The catch is time. The Afrin label says not to use it for more than 3 days, because frequent or prolonged use may cause congestion to come back or get worse. If your symptoms keep going, the label says to stop and ask a doctor. Like Sudafed, its label says to ask a health professional before use if you are breastfeeding.
- Afrin Original: oxymetazoline 0.05%. Adults: 2 or 3 sprays in each nostril, not more often than every 10 to 12 hours, and no more than 2 doses in 24 hours.
- Limit: no more than 3 days in a row.
- Possible side effects: burning, stinging, sneezing, or a runnier nose for a short time, per the label. Do not share the bottle, since that can spread infection.
If I do take Sudafed, how do I lower the risk?
If your doctor or pharmacist says Sudafed is OK for you, keep it short and stick to the label. LactMed says repeated use seems to interfere with lactation, so watch your supply and tell your doctor if it drops.
Do not take Sudafed with any other product that has a decongestant in it. That includes Sudafed PE and any multi-symptom cold or allergy medicine that lists a decongestant. Check every Drug Facts label for pseudoephedrine or phenylephrine before you add anything.
- Sudafed Sinus Congestion dose: adults and children 12 and over take 2 tablets (60 mg) every 4 to 6 hours, not more than 8 tablets in 24 hours.
- High blood pressure or heart disease: ask a doctor first. The label also lists thyroid disease, diabetes, and trouble urinating from an enlarged prostate.
- MAOIs: do not use Sudafed or Sudafed PE if you take a prescription MAOI (certain medicines for depression, psychiatric or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping one.
- Stop and ask a doctor: if you get nervousness, dizziness, or trouble sleeping, or if symptoms do not improve within 7 days or come with a fever.
When should you get care?
In an emergency, call 911Stop the decongestant and ask a doctor if your congestion comes with a fever or has not improved after 7 days. Both are stop-and-ask-a-doctor signs on the Sudafed label.
Call your doctor right away if you get a fast, pounding, or irregular heartbeat, bad dizziness, or severe nervousness after taking a decongestant.
Call your baby's doctor the same day if your baby is unusually irritable, feeding much less, or you think your baby is not getting enough milk.
If someone took too much, get medical help or call Poison Control at 1-800-222-1222 right away, as the Sudafed and Sudafed PE labels say.
Call 911 for chest pain, trouble breathing, fainting, or a baby who is hard to wake.
How our AI doctor decides when to send you to care ›Do I need to pump and dump after Sudafed?
LactMed's summary does not mention pumping and dumping after pseudoephedrine. Its concern is that Sudafed can lower how much milk you make. It says the small amounts in breast milk are unlikely to harm a nursing baby. Throwing milk away does not fix a supply drop.
If you notice your supply dip after taking Sudafed, talk to your doctor or a lactation consultant about stopping it and how to protect your supply. Call your baby's doctor if your baby seems irritable or is not feeding well.
Common questions
Can I take Sudafed while breastfeeding?
Only small amounts reach your baby, but LactMed says a single dose of pseudoephedrine decreases milk production and repeated use seems to interfere with lactation. It should not be used with a newborn whose feeding is not well established, or if you already have low supply. Ask your doctor or pharmacist first, as the label says.
How much does Sudafed lower milk supply?
It varies, and LactMed's summary does not give 1 number for everyone. It says a single dose lowers production acutely and repeated doses seem to interfere with lactation. If your supply is still building or already low, the risk matters more.
Is Sudafed PE safe while breastfeeding?
LactMed says very little oral phenylephrine reaches the baby, but it might decrease milk production, and another drug may be preferred, especially with a newborn or preterm baby. The FDA has also proposed removing oral phenylephrine as a decongestant because its review found it is not effective as a decongestant when taken by mouth. That proposal does not cover nasal sprays.
Can I use Afrin nasal spray while breastfeeding?
LactMed says very little oxymetazoline, the ingredient in Afrin, should reach your baby, and recommends it over oral decongestants like pseudoephedrine while breastfeeding. Do not use it for more than 3 days, because the label warns that longer use can make congestion come back or get worse. Ask a health professional before use, as the label says.
Can I take Sudafed if I'm breastfeeding and have high blood pressure?
Ask your doctor first. The Sudafed and Sudafed PE labels both say to ask a doctor before use if you have high blood pressure or heart disease. The Afrin label lists the same conditions.
Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment. Always seek the advice of a qualified health provider with questions about a medical condition. If you think you may have a medical emergency, call 911.