A new study shows that orders of Tylenol (acetaminophen) for pregnant women in US emergency rooms dropped after health officials linked the drug to the risk of autism.[1] In September, US health officials announced a link between acetaminophen use during pregnancy and a higher risk of autism and ADHD, leading to a nationwide information campaign.[1][3] This challenge stemmed from a 2025 meta-analysis that found significant associations with neurodevelopmental disorders.[1] However, later studies published in the Lancet and JAMA did not find a causal relationship; for example, a JAMA study of sibling pairs reported a hazard ratio of 0.98 for autism and ADHD.[1][2][4] In this study, 7.49% of children were exposed to acetaminophen during pregnancy, with crude autism risks of 1.53% for exposed versus 1.33% for unexposed.[4] Studies highlight that previous associations may have been influenced by factors such as genetics or maternal illnesses.[2][5] Experts confirm that paracetamol remains a safe choice in pregnancy at the correct dosage.[1]