Is ibuprofen safe during pregnancy?
Answer
Avoid ibuprofen (Advil, Motrin) after 20 weeks of pregnancy per FDA warning. Risk of fetal kidney problems, oligohydramnios, and (after 30 weeks) premature closure of the ductus arteriosus. First-trimester use is also discouraged. Acetaminophen (Tylenol) is the safer alternative.
The FDA October 2020 warning
In October 2020, the FDA issued a formal Drug Safety Communication recommending that pregnant women avoid NSAIDs at 20 weeks and beyond, citing growing evidence of fetal harm1. This applies to ibuprofen and all other NSAIDs (naproxen, aspirin in full doses, diclofenac, etc.).
See the [Ibuprofen ingredient page](/ingredients/ibuprofen/) for full mechanism details.
What can go wrong
- Fetal kidney effects (20+ weeks). NSAID-induced reduction in fetal urine output causes oligohydramnios (low amniotic fluid). Downstream effects include lung development issues and joint contractures.
- Premature closure of the ductus arteriosus (30+ weeks). The fetal ductus is kept open by prostaglandins. NSAID-driven prostaglandin reduction can cause early closure, leading to neonatal pulmonary hypertension — a serious complication2.
- First trimester risk. Some studies suggest NSAID use early in pregnancy may slightly increase miscarriage risk, though evidence is mixed3.
By trimester
- First trimester (weeks 1-12): Avoid if possible. Use acetaminophen instead.
- Second trimester (weeks 13-26): Avoid from 20 weeks onward per FDA.
- Third trimester (weeks 27-40): Strictly contraindicated.
Safer alternatives
Acetaminophen (Tylenol) is the recommended first-line pain reliever and fever reducer in pregnancy across all trimesters. For inflammation-driven pain (joint, dental), discuss with your OB — some non-NSAID options may be appropriate. Avoid the temptation to use combination cold/flu products that contain ibuprofen “just for a day or two.” The cumulative risk-benefit doesn’t favor it.
What about low-dose aspirin?
Low-dose aspirin (81 mg) prescribed by an OB for preeclampsia prophylaxis is a different clinical scenario from OTC NSAID use and is not covered by the FDA warning. Continue as your OB directs.
Related ingredients
Ibuprofen
Avoid ibuprofen after 20 weeks of pregnancy. NSAIDs can cause fetal kidney problems, oligohydramnios, and (after 30 weeks) premature closure of the…
Acetaminophen
Acetaminophen (Tylenol) is the first-line OTC pain reliever and fever reducer in pregnancy per ACOG. Considered safe at recommended doses across all…
Sources
- U.S. Food and Drug Administration. (2020). FDA recommends avoiding use of NSAIDs in pregnancy at 20 weeks or later. FDA Drug Safety Communication. View source →
- Bloor M, Paech M. (2013). Nonsteroidal anti-inflammatory drugs during pregnancy and the initiation of lactation. Anesthesia & Analgesia. View source →
- Nakhai-Pour HR, Broy P, Sheehy O, Bérard A. (2011). Use of nonaspirin nonsteroidal anti-inflammatory drugs during pregnancy and the risk of spontaneous abortion. CMAJ. View source →