Is Naproxen Safe During Pregnancy

Status

avoid Last reviewed: 2026-05-16 · Confidence: high

Reason

Avoid after 20 weeks unless a prescriber specifically advises it; can reduce amniotic fluid and affect the baby's kidneys.

Drug Information

Brand Name
Naprosyn
Generic Name
naproxen
Drug Class
NSAID (nonsteroidal anti-inflammatory drug)
FDA Category
C
Rx Status
OTC

Safe Amount

Dosage must be determined by your provider based on individual risk/benefit.

Effects

Pregnancy
Not usually recommended. FDA advises avoiding NSAIDs at 20 weeks or later unless specifically directed by a healthcare professional.
Mother
May cause pregnancy-related complications if used without medical guidance; also may make it harder to get pregnant.
Baby
May cause low amniotic fluid, kidney problems, and later pregnancy circulation or heart problems.

Trimester Notes

1st Trimester
Use only if your prescriber says the benefit outweighs the risk. Some reports note possible small heart defect risk, but data are limited.
2nd Trimester
Avoid from 20 weeks unless a healthcare professional specifically recommends it. If needed, use the lowest dose for the shortest time and monitor if use lasts beyond 48 hours.
3rd Trimester
Avoid in the third trimester. OTC labels warn against use in the last 3 months because it may cause problems in the unborn baby or delivery complications.

Conditions & Warnings

  • Consult OB/GYN or prescriber
  • OTC pregnancy dosing limits may apply
  • Avoid unless specifically advised after 20 weeks
  • Use the lowest effective dose for the shortest duration only if a clinician says it is necessary

Alternatives

  • Acetaminophen (paracetamol) if your clinician says it is appropriate
  • Non-medicine options such as rest, ice, heat, or physical therapy if advised by your clinician

References

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