Can I take mometasone nasal spray while pregnant or breastfeeding?
A plain-words look at what the NHS, the US drug label and LactMed say about mometasone nasal spray.
In short
Pregnancy: You can use mometasone nasal spray while pregnant.
Breastfeeding: You can carry on using your mometasone nasal spray as normal while breastfeeding.
Your doctor, midwife or pharmacist can help you decide.
What this means for you
Pregnancy
- Only a very small amount of mometasone reaches your bloodstream, and almost none reaches your baby.
- Even if a little does reach your baby, it will not harm them.
Breastfeeding
- There's no information on mometasone nasal spray in breastfeeding, but it's unlikely that any gets into breast milk or is absorbed by your baby.
- It's also very unlikely to cause side effects in your baby.
- If your baby is not feeding as well as they usually do, or you're worried about them in any other way, contact your health visitor, midwife, pharmacist or doctor promptly.
Talk to your doctor or pharmacist
This page is educational, not advice for your own situation. Talk to your doctor, midwife or pharmacist before you start, stop or change any medicine in pregnancy or while breastfeeding.
The details: what each source says
Mometasone nasal spray in pregnancy
The NHS says
You can use mometasone nasal spray while pregnant.
Only a very small amount of mometasone reaches your bloodstream, and almost none reaches your baby. Even if a little does reach your baby, it will not harm them.
In our words, from the NHS page Mometasone nasal spray (nhs.uk). Contains public sector information licensed under the Open Government Licence v3.0 (OGL v3.0). The NHS does not endorse this site.
The US drug label says
If pregnant or breast-feeding, ask a health professional before use.
Drug Facts label: Allergy (nasal), Amazon.com Services LLC. Label on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
This quote is from the nasal formulation label.
8.1 Pregnancy Teratogenic Effects: There are no adequate and well-controlled studies in pregnant women. Therefore, mometasone furoate cream should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Corticosteroids have been shown to be teratogenic in laboratory animals when administered systemically at relatively low dosage levels. Some corticosteroids have been shown to be teratogenic after dermal application in laboratory animals. When administered to pregnant rats, rabbits, and mice, mometasone furoate increased fetal malformations. The doses that produced malformations also decreased fetal growth, as measured by lower fetal weights and/or delayed ossification. Mometasone furoate also caused dystocia and related complications when administered to rats during the end of pregnancy. In mice, mometasone furoate caused cleft palate at subcutaneous doses of 60 mcg/kg and above. Fetal survival was reduced at 180 mcg/kg. No toxicity was observed at 20 mcg/kg.
Prescribing label, section “8.1 Pregnancy” (opening excerpt): Mometasone Furoate (topical), Preferred Pharmaceuticals Inc. Read the full section on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
This quote is from the topical formulation label.
Mometasone nasal spray while breastfeeding
The NHS says
You can carry on using your mometasone nasal spray as normal while breastfeeding.
There's no information on mometasone nasal spray in breastfeeding, but it's unlikely that any gets into breast milk or is absorbed by your baby. It's also very unlikely to cause side effects in your baby.
If your baby is not feeding as well as they usually do, or you're worried about them in any other way, contact your health visitor, midwife, pharmacist or doctor promptly.
In our words, from the NHS page Mometasone nasal spray (nhs.uk). Contains public sector information licensed under the Open Government Licence v3.0 (OGL v3.0). The NHS does not endorse this site.
The US prescribing label says
Nursing Mothers Systemically administered corticosteroids appear in human milk and could suppress growth, interfere with endogenous corticosteroid production, or cause other untoward effects. It is not known whether topical administration of corticosteroids could result in sufficient systemic absorption to produce detectable quantities in human milk. Because many drugs are excreted in human milk, caution should be exercised when mometasone furoate cream is administered to a nursing woman.
Prescribing label, section “Nursing Mothers”: Mometasone Furoate (topical), Preferred Pharmaceuticals Inc. Label on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
This quote is from the topical formulation label.
Other names
UK brand names (per the NHS): Clarinaze, Nasonex.
US name: mometasone.
The NHS has separate pages for other forms: mometasone for skin.
Sources
- NHS, Mometasone nasal spray (nhs.uk), page last reviewed 24 January 2024. Paraphrased. Contains public sector information licensed under the Open Government Licence v3.0.
- US drug label: Allergy (nasal), Amazon.com Services LLC, human otc drug, label effective 27 August 2026, set ID b4d548fa-374d-407f-8a41-f04bf6a0e7a4. DailyMed (National Library of Medicine). Public domain; quoted verbatim.
- US drug label: Mometasone Furoate (topical), Preferred Pharmaceuticals Inc., human prescription drug, label effective 17 July 2026, set ID 831f7694-8153-4a79-a453-48020b26f035. DailyMed (National Library of Medicine). Public domain; quoted verbatim.
Sources checked 26 September 2026. How we source and check every page.
Educational summary of named sources, not medical advice.