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Illnesses/First Aid

Acetaminophen and Ibuprofen for Babies: Safety Basics

May 23, 2026

Key takeaways: Call your baby’s doctor before giving any fever medicine to a baby under 12 weeks. Ibuprofen isn’t recommended for babies under 6 months unless your doctor advises it. Dose by weight, not age, and use the device that comes with the product. Never give aspirin to children. Fever medicine is for comfort; the fever itself helps fight infection.

Acetaminophen (Tylenol and others) and ibuprofen (Motrin, Advil, and others) are common fever and pain relievers. Using them safely is essential.

Acetaminophen

  • Under 12 weeks: call your baby’s doctor before giving it, and for any fever.
  • Dosed by weight. Ask your doctor or pharmacist for your baby’s dose.
  • Infant and children’s liquid acetaminophen in the U.S. is now the same concentration (160 mg per 5 mL), but always check the label.
  • Don’t exceed the maximum number of doses in 24 hours.
  • Watch for acetaminophen in combination products.

From the author

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Ibuprofen

  • Not recommended under 6 months unless your doctor advises.
  • Infant drops and children’s liquid are different concentrations. Check carefully.
  • Give with food if it upsets your baby’s stomach.
  • Avoid if your baby is dehydrated or vomiting a lot; ask your doctor.

Never Give Aspirin

Aspirin is linked to Reye’s syndrome, a rare but serious illness, in children.

Alternating Medicines

The AAP notes that alternating acetaminophen and ibuprofen can lead to dosing errors. Only alternate if your doctor advises, with clear instructions.

Fever Is Not the Enemy

Fever is the body’s way of fighting infection. The AAP says the goal of treatment is your baby’s comfort, not a normal temperature.

Dosing Safety

  • Use the device that comes with the product.
  • Write down doses and times.
  • Keep medicines locked up and out of reach.
  • Call Poison Control at 1-800-222-1222 if you think your baby got too much.

Call your baby’s doctor if your baby: is under 3 months with a fever of 100.4°F or higher, has a fever over 104°F, has a fever for more than 2 to 3 days, seems very ill, or has signs of dehydration.

The Bottom Line

Check with your doctor before giving fever medicine to young babies, dose by weight, use the correct device, and never give aspirin.

Want more support for your baby’s first year? My book, From First Breath to First Birthday, is available on Amazon.

Related Articles

Sources

  1. Sullivan JE, Farrar HC; Section on Clinical Pharmacology and Therapeutics; Committee on Drugs. Fever and antipyretic use in children. Pediatrics. 2011;127(3):580-587.
  2. American Academy of Pediatrics. Acetaminophen and ibuprofen dosing tables. HealthyChildren.org. https://www.healthychildren.org
  3. U.S. Food and Drug Administration. Use caution when giving cough and cold products to kids; acetaminophen information. https://www.fda.gov

This article is for general education and is not a substitute for individualized medical advice. Always talk with your baby’s health care provider or your own provider about your specific situation. If you think your baby or you may have a medical emergency, call 911.

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