Can you take minoxidil 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 the minimal amount of information on this potent agent, use oral minoxidil with caution, particularly when therapy involves a large maternal dosage or breastfeeding a newborn. Maternal topical minoxidil is acceptable once breastfeeding is established. Avoid contact between the infant and skin treated with minoxidil because it can be absorbed by the infant and cause adverse effects such as excessive hair growth.
Quoted from Minoxidil — Drugs and Lactation Database (LactMed®), National Institute of Child Health and Human Development, revised May 15, 2026.
What LactMed would consider instead
LactMed ends this record by naming the drugs it would consider in place of minoxidil. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.
How much minoxidil gets into breastmilk
Maternal Levels. In one case report, a 2-month-postpartum mother who was taking minoxidil 5 mg twice daily was given an oral dose of 7.5 mg. The peak milk level of minoxidil plus glucuronide conjugate was 45.1 mcg/L one hour after the dose. Milk levels paralleled serum levels, falling rapidly after the first hour to a concentration of 12.4 mcg/L at 3 hours, 4 mcg/L at 6 hours, 1.9 mcg/L at 9 hours, 0.8 mcg/L at 12 hours after the dose.
Infant Levels. Relevant published information was not found as of the revision date.
What has been seen in breastfed infants
No hypertrichosis or other abnormal signs were seen in one infant breastfed (extent not stated) for 2 months of maternal minoxidil 5 mg twice daily by mouth. The mother was taking the drug throughout pregnancy and postpartum and the infant was born at 37 weeks of gestation.
Another breastfed (extent not stated) infant who was born 4 weeks preterm developed facial hypertrichosis while her mother was using 5% minoxidil topically twice a day. The infant appeared normal at 2 weeks of age, but had considerable black hair on the forehead at 2 months of age. The mother discontinued minoxidil and at 6 months of age, the infant had lost the excess hair. The time course of minoxidil use and hair growth was not clearly specified in the report. The reaction was possibly caused by minoxidil in milk, but no documentation of maternal or infant serum levels or milk levels was made and normal transient neonatal hypertrichosis is the possible cause.
A retrospective study of cases reported to the WHO adverse reaction database, VigiBase, found a total of 45 reports of hypertrichosis in infants attributed to minoxidil. In addition, 11 cases of infantile hypertrichosis or “werewolf syndrome” were reported in Spain, characterized by excessive, fur-like growth of body hair. It is thought that widespread use of topical minoxidil in these countries was responsible. It was suspected that the drug was inadvertently absorbed via skin-to-skin contact or accidentally ingested by the infants through breastmilk or other unknown sources.
Effects on milk supply
Relevant published information was not found as of the revision date.
Frequently asked questions
Can you take minoxidil while breastfeeding?
What the NIH's Drugs and Lactation Database says about Minoxidil while breastfeeding — quoted in full. 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 minoxidil while breastfeeding?
LactMed lists Candesartan, Benazepril, Captopril, Enalapril, Lisinopril, Quinapril, Hydrochlorothiazide, Methyldopa, Propranolol 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 minoxidil pass into breastmilk?
LactMed's measured drug levels for minoxidil are quoted in full on this page, under "How much gets into breastmilk".
Do I need to pump and dump after taking minoxidil?
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 minoxidil
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.