A large Danish study tracking more than 1.5 million children born between 1997 and 2022 has found no connection between acetaminophen (the active ingredient in the painkiller Tylenol) use during pregnancy and autism diagnoses in children, according to research published Monday in JAMA Pediatrics. The findings directly contradict claims made by the Trump administration, which last September prompted the US Food and Drug Administration to pursue warning labels on acetaminophen products over a purported autism link — a move that coincided with a 16% drop in Tylenol orders for pregnant women in US emergency rooms. Medical experts warn that the shift in prescribing behaviour is concerning, as acetaminophen remains one of the safest options for pain and fever management during pregnancy, with common alternatives such as ibuprofen carrying their own risks for pregnant patients.