Danish Study: Tylenol in Pregnancy Safe for Autism Risk

Pregnant women can breathe easier after a groundbreaking Danish study found no connection between Tylenol use during pregnancy and autism in children.

Researchers examined health records from more than 1.5 million children born in Denmark between 1997 and 2022. Among the 31,098 children exposed to Tylenol (also known as acetaminophen or paracetamol) in the womb, only 1.8% were later diagnosed with autism, compared to 3% in the unexposed group.

The study, published in JAMA Pediatrics, showed the medication was actually associated with lower autism rates. This held true regardless of dosage or which trimester mothers took the medication.

The findings come at a critical time. In September 2024, the U.S. Food and Drug Administration announced plans to add warning labels about potential autism and ADHD risks to acetaminophen products. Former President Donald Trump went further, advising pregnant women and infants to avoid the drug entirely due to autism concerns.

Medical groups worldwide pushed back against these warnings, calling them unfounded. The new Danish study supports their position with hard data from one of the largest pregnancy studies ever conducted.

This isn't the first time research has cleared Tylenol for pregnancy use. A 2024 Swedish study reached the same conclusion, finding no autism link.

The confusion stems from a 2025 review that suggested a possible connection between prenatal acetaminophen and neurodevelopmental disorders. However, those researchers themselves emphasized their findings didn't prove causation and recommended pregnant women continue using the medication as needed.

The Bright Side

For millions of expectant mothers dealing with headaches, fevers, or other pain, this study offers something precious: peace of mind. Pregnancy comes with enough worries without adding unnecessary fear about safe pain relief.

U.S. Health Secretary Robert F. Kennedy Jr. acknowledged in October that evidence doesn't show Tylenol definitively causes autism, though he still recommended caution. The Danish study's massive scale and careful methodology now provide the strongest evidence yet that such caution may be unnecessary.

The research team accounted for individual risk factors and examined different doses and timing throughout pregnancy. Every angle they checked showed the same result: no increased autism risk.

Sometimes the best news is the simplest: a medication millions rely on appears to be exactly as safe as doctors have long believed.