Overview

• Pre-release reporting says the HHS/NIH report will name prenatal acetaminophen use and low maternal folate as autism risk factors and may highlight folinic acid, with NIH leading the draft and new autism data-science grants expected.
• A large 2024 JAMA study of nearly 2.5 million Swedish children using sibling-control analyses found no causal association between prenatal acetaminophen exposure and autism, ADHD or intellectual disability.
• Major medical groups including ACOG and SMFM continue to recommend judicious acetaminophen use in pregnancy when medically indicated, while clinicians warn alarmist messaging could deter necessary treatment and stigmatize parents.
• Kenvue, Tylenol’s parent, saw shares tumble more than 14% intraday and close down about 9% after the reports and the stock remains volatile, as several banks labeled the selloff an overreaction.
• An HHS spokesperson called claims about the report’s contents speculation until release, Kenvue said the science shows no causal link, and prior Tylenol–autism lawsuits have been dismissed for insufficient evidence.