Overview

• President Trump said the FDA will notify clinicians that acetaminophen use during pregnancy can be associated with higher autism risk and urged limiting the drug to medically necessary cases.
• Health Secretary Robert F. Kennedy Jr. led the federal review behind the move as the administration framed the step as part of a broader push on autism.
• Obstetrics leaders and researchers criticized the warning as unsupported by the full body of evidence, highlighting mixed findings and the 2024 Swedish sibling-control study showing no causal relationship.
• Tylenol maker Kenvue rejected the claim, citing more than a decade of research indicating no causal link, as its shares fell about 7.5% on Monday.
• The administration spotlighted leucovorin as a potential intervention for some autism-related symptoms, and Trump questioned infant vaccination practices, including suggesting a delay of the hepatitis B shot until age 12.