Can I take diclofenac while pregnant or breastfeeding?
A plain-words look at what the NHS, the US drug label and LactMed say about diclofenac.
In short
Pregnancy: Diclofenac, and medicines containing it, are not usually recommended during pregnancy.
Breastfeeding: You can take or use diclofenac while breastfeeding.
Your doctor, midwife or pharmacist can help you decide.
What this means for you
Pregnancy
- This is because they can sometimes cause problems in the womb.
- They can affect how blood flows around your baby's body, or lower the amount of amniotic fluid surrounding your baby.
- Your doctor will only suggest diclofenac during pregnancy if the benefits of the medicine outweigh the risks.
- If you do need diclofenac, it should only be for a short time (a few days).
- Paracetamol is generally the first-choice painkiller in pregnancy.
- There are stronger painkillers that can be used in pregnancy after you've discussed them with your doctor.
Breastfeeding
- Just tiny amounts reach breast milk, so it should not cause side effects in your baby.
- Diclofenac has been used widely by breastfeeding mothers for many years, and no problems have been reported.
- If you use diclofenac gel, make sure your baby does not touch any part of your body where you've put it.
- Wash your hands after applying it and before you pick up your baby.
When to get help
- If your baby is not feeding as well as they usually do, has an upset stomach (such as vomiting or diarrhoea), or you're worried about your baby in any other way, contact your midwife, health visitor, 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
Diclofenac in pregnancy
The NHS says
Diclofenac, and medicines containing it, are not usually recommended during pregnancy.
This is because they can sometimes cause problems in the womb. They can affect how blood flows around your baby's body, or lower the amount of amniotic fluid surrounding your baby.
Your doctor will only suggest diclofenac during pregnancy if the benefits of the medicine outweigh the risks.
If you do need diclofenac, it should only be for a short time (a few days).
Paracetamol is generally the first-choice painkiller in pregnancy. There are stronger painkillers that can be used in pregnancy after you've discussed them with your doctor.
In our words, from the NHS page Diclofenac (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. It is especially important not to use diclofenac at 20 weeks or later in pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery.
Drug Facts label: Diclofenac (topical), YYBA CORP. Label on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
Pregnancy Risk Summary Use of NSAIDs, including diclofenac sodium extended-release tablets, can cause premature closure of the fetal ductus arteriosus and fetal renal dysfunction leading to oligohydramnios and, in some cases, neonatal renal impairment. Because of these risks, limit dose and duration of diclofenac sodium extended-release tablets use between about 20 and 30 weeks of gestation, and avoid diclofenac sodium extended-release tablets use at about 30 weeks of gestation and later in pregnancy ( see WARNINGS ; Fetal Toxicity ). Premature Closure of Fetal Ductus Arteriosus Use of NSAIDs, including diclofenac sodium extended-release tablets, at about 30 weeks gestation or later in pregnancy increases the risk of premature closure of the fetal ductus arteriosus. Oligohydramnios/Neonatal Renal Impairment Use of NSAIDs at about 20 weeks gestation or later in pregnancy has been associated with cases of fetal renal dysfunction leading to oligohydramnios, and in some cases, neonatal renal impairment.
Prescribing label, section “Pregnancy” (opening excerpt): Diclofenac Sodium (oral), A-S Medication Solutions. Read the full section on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
Diclofenac while breastfeeding
The NHS says
You can take or use diclofenac while breastfeeding. Just tiny amounts reach breast milk, so it should not cause side effects in your baby.
Diclofenac has been used widely by breastfeeding mothers for many years, and no problems have been reported.
If you use diclofenac gel, make sure your baby does not touch any part of your body where you've put it. Wash your hands after applying it and before you pick up your baby.
If your baby is not feeding as well as they usually do, has an upset stomach (such as vomiting or diarrhoea), or you're worried about your baby in any other way, contact your midwife, health visitor, pharmacist or doctor promptly.
In our words, from the NHS page Diclofenac (nhs.uk). Contains public sector information licensed under the Open Government Licence v3.0 (OGL v3.0). The NHS does not endorse this site.
LactMed says
Data on excretion of diclofenac into milk are poor, but the drug has a short half-life and little glucuronide metabolite formation. Levels in milk appear to be quite low. Most reviewers consider diclofenac to be acceptable during breastfeeding.[1-5] Other agents having more published information may be preferred, especially while nursing a newborn or preterm infant.[6]
Maternal use of diclofenac topical gel or eye drops would not be expected to cause any adverse effects in breastfed infants. To substantially diminish the amount of drug that reaches the breastmilk 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.
“Summary of Use during Lactation”, LactMed record “Diclofenac” (LM89), quoted verbatim. Everything LactMed reports about Diclofenac while breastfeeding.
The US prescribing label says
Nursing Mothers Risk Summary Based on available data, diclofenac may be present in human milk. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for diclofenac sodium extended-release tablets and any potential adverse effects on the breastfed infant from the diclofenac sodium extended-release tablets or from the underlying maternal condition. Data One woman treated orally with a diclofenac salt, 150 mg/day, had a milk diclofenac level of 100 mcg/L, equivalent to an infant dose of about 0.03 mg/kg/day. Diclofenac was not detectable in breast milk in 12 women using diclofenac (after either 100 mg/day orally for 7 days or a single 50 mg intramuscular dose administered in the immediate postpartum period).
Prescribing label, section “Nursing Mothers”: Diclofenac Sodium (oral), A-S Medication Solutions. Label on DailyMed. Quoted verbatim; US labels are written for US prescribers and patients.
Other names
UK brand names (per the NHS): Voltarol, Dicloflex, Diclomax, Econac, Motifene.
Sources
- NHS, Diclofenac (nhs.uk), page last reviewed 5 August 2024. Paraphrased. Contains public sector information licensed under the Open Government Licence v3.0.
- US drug label: Diclofenac (topical), YYBA CORP, human otc drug, label effective 1 September 2026, set ID 533653e8-93d5-9080-e063-6394a90a165b. DailyMed (National Library of Medicine). Public domain; quoted verbatim.
- US drug label: Diclofenac Sodium (oral), A-S Medication Solutions, human prescription drug, label effective 2 September 2026, set ID d9698809-4887-4514-aa28-0066355ef908. DailyMed (National Library of Medicine). Public domain; quoted verbatim.
- Drugs and Lactation Database (LactMed), National Institute of Child Health and Human Development (NICHD), via NCBI Bookshelf, record “Diclofenac” (LM89), bulk release of 22 September 2026. LactMed on NCBI Bookshelf. Public domain; quoted verbatim. LactMed is a registered trademark of the U.S. Department of Health and Human Services.
Sources checked 26 September 2026. How we source and check every page.
Educational summary of named sources, not medical advice.
