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Ibuprofen (Advil®, Motrin®)

Last Update: 08 May 2025

Welcome to our fact sheet on ibuprofen during pregnancy and breastfeeding/chestfeeding. This information is based on available published literature. It should not replace medical care and personalized advice from your healthcare provider.

The HEALTHY PREGNANCY HUB team is collaborating with MotherToBaby to share information on this topic. The original version is available here (March 2024).

Serene, our chatbot, can also answer your questions about medications during pregnancy.

Please note that this fact sheet is based on United States information and has been adapted for Canada, with a review by our Canadian experts. Minor differences may exist between the two countries. Always consult your healthcare professional for information tailored to your situation.

1. What is ibuprofen?

Ibuprofen is a medication that has been used to treat pain and fever. Some brand names for ibuprofen include Motrin®, Advil®, and Nuprin®. Ibuprofen belongs to the class of medications called non-steroidal anti-inflammatory drugs (NSAIDs). 

The U.S. Food and Drug Administration (FDA) recommends not using NSAIDs after week 20 of pregnancy, unless your healthcare provider specifically recommends it. 

2. What does research say about the risks during pregnancy?

I take ibuprofen. Can it make it harder for me to get pregnant? 

It is not known if ibuprofen can make it harder to get pregnant. A few small studies have suggested using ibuprofen might interfere with the release of the ovary’s eggs (unrupture follicle syndrome) which might make it harder to get pregnant.

Does taking ibuprofen increase the chance of miscarriage? 

Miscarriage is common and can occur in any pregnancy for many different reasons. Some studies have suggested that the use of ibuprofen might increase the chance of miscarriage, especially if taken around the time of conception or over a long period of time. As there can be many causes of miscarriage, it is hard to know if medication, the medical condition being treated, or other factors are the cause of a miscarriage. 

Does taking ibuprofen increase the chance of birth defects? 

Birth defects can happen in any pregnancy for different reasons. Out of all babies born each year, about 3 out of 100 (3%) will have a birth defect. We look at research studies to try to understand if a drug an exposure, like ibuprofen, might increase the chance of birth defects if taken during a pregnancy. 

There are some studies that have not reported an increased chance of birth defects with ibuprofen use. There are also few studies that have suggested that taking ibuprofen in the first trimester might lead to a small increased chance (less than 1% chance) for gastroschisis (when the intestines stick out of a hole in the stomach wall). One study is not enough information to make a conclusion about the chance of birth defects. 

A small increased chance of heart defects has been reported in a few studies looking at NSAID prescriptions in early pregnancy. However, the reason the NSAID was prescribed was not available in most of the reported data. Studies based on filled prescriptions/prescription records, so the researchers cannot tell if a person really took the medication. This makes it hard to know if the study outcomes are related to the medication or other factors. 

Does taking ibuprofen in pregnancy increase the chance of other pregnancy-related problems? 

Ibuprofen is generally not recommended for use after week 20 of pregnancy. There have been some reports that NSAID use in the 2nd half of pregnancy might affect the fetal kidneys and the amount of amniotic fluid (fluid that surrounds the fetus in the uterus). One study suggested that the use of NSAIDS in the 1st half of pregnancy might also affect the fetal kidneys and amount of amniotic fluid. If there is not enough amniotic fluid (called oligohydramnios), other pregnancy complications, such as poor lung development and joint contractures (joints are stiff or unable to move), could happen. Oligohydramnios can also increase the chance that an early delivery is needed through induction of labor or C-section.   

There are some studies that suggest NSAIDs can increase the chance of other pregnancy-related problems, such as preterm delivery (birth before week 37) or low birth weight (weighing less than 5 pounds, 8 ounces [2500 grams] at birth. Other studies have not reported these findings. 

Ibuprofen use later in pregnancy might also cause premature closure of the opening between the two major blood vessels (ductus arteriosus) leading from the heart. This can cause high blood pressure in the baby’s lungs (pulmonary hypertension). 

Ibuprofen should only be used under a healthcare provider’s supervision, particularly in the 2nd and 3rd trimesters. Your healthcare providers can closely monitor your pregnancy if you need to use ibuprofen after week 20. 

Does taking ibuprofen in pregnancy affect future behavior or learning for the child?  

It is not known if ibuprofen can increase the chance of behavior or learning issues for the child. 

3. Breastfeeding​/ chestfeeding​ while taking ibuprofen

Ibuprofen gets into breast milk/ human milk in small amounts. The amount of ibuprofen in breast milk/ human milk is less than the doses given to infants directly. Side effects are not expected in children exposed to ibuprofen through breast milk/ human milk. Be sure to talk to your healthcare provider about all your breastfeeding/ chestfeeding questions.

4. What about fathers and sperm donors?

If a male takes ibuprofen, could it affect fertility or increase the chance of birth defects? 

It is not known if ibuprofen could affect a male’s fertility (ability to get a partner pregnant). Studies have not been done to see if ibuprofen could increase the chance of birth defects. In general, exposures that fathers or sperm donors have are unlikely to increase risks to a pregnancy. For more information, please see the MotherToBaby fact sheet Paternal Exposures here.

Key points

  • Ibuprofen (Motrin®, Advil®) is a common non-steroidal anti-inflammatory drugs (NSAIDs), available without prescription, used to treat pain and fever.  
  • NSAIDS are generally avoided after 20 weeks of pregnancy, unless specifically recommended by your healthcare provider, as it may be associated with heart development problems 
  • Some studies suggest a slight increase in the risk of miscarriage and malformations, but research is limited and other factors could be responsible. 
  • Ibuprofen passes into breast milk/ human milk in small amounts, but no harmful effects have been reported in nursing babies.  
  • Always consult your healthcare provider before using ibuprofen during pregnancy, especially in the second and third trimesters. 

References

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HEALTHY PREGNANCY HUB provides a source of information validated by health professionals; however, this information is provided for informational purposes only and should not replace professional advice. Medical standards and practices evolve as new data becomes available, so it is imperative to consult your doctor or a qualified health professional for any questions or concerns regarding your health without delay or omission. It is the responsibility of your treating physician or any other health professional, based on their independent experience and knowledge of the patient, to determine the best way to evaluate and treat you.

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While consulting symptoms or other medical information on our platform may guide your discussions with your healthcare professional, this information should not be used to make a medical diagnosis or determine treatment. Before making changes to your supplement or medication regimen, please discuss with your medical team or contact 811 (Canada) to ensure the relevance of these changes to your individual situation.

Credits
MotherToBaby
Organization of Teratology Information Specialists (OTIS)
View source
Anne-Sophie Otis
Centre Hospitalier Sainte-Justine
Sasha Bernatsky
Research Institute of the McGill University Health Centre
Émy Roberge
Centre hospitalier universitaire Sainte-Justine

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