Is minoxidil safe during pregnancy or breastfeeding?

Can you use minoxidil while breastfeeding?

The AAD says to avoid minoxidil while breastfeeding, but LactMed calls minoxidil on the scalp acceptable once breastfeeding is established.

The AAD, the American dermatologists’ academy, gives its reason in one line. Traces of minoxidil may pass into breast milk, it says, and that can be harmful to a nursing baby.

LactMed is a database on medicines and breastfeeding from the US National Institutes of Health. Its summary calls minoxidil on the scalp acceptable once breastfeeding is established. It treats tablets taken by mouth differently. Use those with caution, it says, most of all at a large dose or with a newborn.

LactMed adds one line for scalp use. Keep your baby away from skin you have treated. Minoxidil can be absorbed by the baby and cause side effects such as extra hair growth, it says.

Two NHS hospital trusts hand out a leaflet on minoxidil tablets for hair loss. The Gloucestershire leaflet says there is no evidence it is safe if you are breastfeeding. The Royal Berkshire leaflet is adapted from it and says the same. Both are about the tablet, not a scalp product.

What is published about minoxidil in pregnancy?

The AAD says to avoid minoxidil in pregnancy. A review in a dermatology journal says it is not recommended, on the scalp or as a tablet.

The AAD’s reason is animal studies. Studies of pregnant animals have shown minoxidil can be harmful to a developing baby, it says.

The review looked at hair loss treatments in pregnancy. It says neither form of minoxidil is recommended during pregnancy. Its reason is reports of birth defects in several body systems, and of newborns with extra hair growth.

The same review says the evidence conflicts. One study followed people using minoxidil on the scalp. It found no patterns of problems in the pregnancy, the mother or the newborn. For tablets, the review says the risk cannot be ruled out, because there is little data.

Does it matter if your minoxidil is a tablet or goes on your scalp?

For breastfeeding, LactMed separates the two: tablets with caution, minoxidil on the scalp acceptable once breastfeeding is established. For pregnancy, the review says neither form is recommended.

The Gloucestershire leaflet says minoxidil is a tablet originally used in larger doses to treat high blood pressure. Its line on pregnancy and breastfeeding is about that tablet.

So when you read a warning, check which form it covers. MedlinePlus has a page just for minoxidil on the scalp, and its advice is to tell your doctor.

Is minoxidil safe in pregnancy, while breastfeeding, trying to conceive, or with PCOS?

Every source cited here that covers pregnancy advises against minoxidil or says to ask your doctor. On breastfeeding, two of them differ.

The chip on each row is what the Truva app shows for minoxidil at that stage. The chips are Truva’s call.

Pregnancy

AVOID The AAD says to avoid minoxidil, citing animal studies. A dermatology review says no form is recommended. It adds that one study of scalp use found no pattern of problems. See the app’s pregnancy ingredient list.

Breastfeeding

AVOID The AAD says to avoid minoxidil. LactMed calls minoxidil on the scalp acceptable once breastfeeding is established. It says to keep your baby off treated skin. See the app’s breastfeeding ingredient list.

Postpartum, not breastfeeding

SAFE No body we found has published a rule on minoxidil postpartum if you are not breastfeeding. The pregnancy and breastfeeding advice above does not cover this stage as written.

Trying to conceive

AVOID The AAD says women who plan to become pregnant should avoid minoxidil. The NHS tablet leaflets say there is no evidence it is safe when trying to conceive. The sources cited here give no waiting time for minoxidil on the scalp. The app’s flag here is its own call about the weeks before a pregnancy is known.

PCOS

SAFE The sources cited here give no minoxidil rule just for PCOS. If you have PCOS and could get pregnant, the pregnancy and trying to conceive rows apply to you too. Our PCOS skincare guide covers minoxidil for female pattern hair loss.

Not pregnant or breastfeeding

SAFE The warnings above are about pregnancy, planning one, and breastfeeding. A cosmetic ingredient called diaminopyrimidine oxide is a separate case. The EU’s cosmetics safety committee (now the SCCS) says it is not a derivative of minoxidil, and does not mention pregnancy or breastfeeding. Truva has its own page for diaminopyrimidine oxide.

Who should I ask about minoxidil in pregnancy or while breastfeeding?

MedlinePlus says to tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding.

If you get pregnant while using minoxidil, MedlinePlus says to call your doctor. MedlinePlus is the patient medicine site of the US National Library of Medicine.

When you tell your doctor, say whether your minoxidil is a tablet or goes on your scalp, and its strength. That is our suggestion, not a published rule. The sources here treat the two forms differently, and two of them differ on breastfeeding.

Where this came from

Every health claim on this page links to the body that published it. Nothing here comes from another blog.

Every link above was fetched and confirmed to resolve on 6 September 2026.

Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. This post was written by the Truva team from the sources listed above. It has not been reviewed by a clinician, and nothing in it is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.