A large nationwide study conducted in Denmark has found no evidence that the use of Tylenol during pregnancy increases the risk of autism in children, Reuters reported.
The research analyzed data from more than 1.5 million children born between 1997 and 2022. Among them, 31,098 had been exposed to Tylenol in the womb. Autism was later diagnosed in 1.8% of those exposed, compared with 3% of children who were not exposed to the drug.
According to the researchers, the results remained consistent even after adjusting for various factors, including the amount of medication taken and the stage of pregnancy during which it was used.
These findings align with a 2024 study from Sweden, which also reported no association between prenatal use of Tylenol and autism.
In 2025, U.S. President Donald Trump urged pregnant women and mothers to avoid Tylenol, saying the pain reliever might contribute to autism. The statement followed research by American scientists that suggested that there might be a possible link between prenatal acetaminophen exposure and neurodevelopmental disorders.
In turn, Kenvue Inc., the American consumer health company that manufactures Tylenol, said that avoiding the drug could lead mothers to use less safe alternatives for pain relief.
