• Brian Lee PhD, one of the authors of the 2024 JAMA sibling study suggesting that there is no causal relationship between acetaminophen use in pregnancy and neurodevelopment disorders talks about this study in this free interview in JAMA.
He mentions a more recent 2025 Japanese study that came to the same conclusions:
“A nationwide Japanese study with about 200 000 persons looked at this exact same question and also did a sibling analysis. The use of acetaminophen in this population was roughly 40%. And they found the exact same thing that our Swedish study did, where there’s an apparent statistical association initially, but it completely disappears when you do the sibling control analysis. And so, the evidence is pointing a certain way that is going to be challenging for other studies to try and overcome.”