Overview

• At a White House event with HHS Secretary Robert F. Kennedy Jr., the president said prenatal acetaminophen could be associated with a higher risk of autism and urged use only when medically necessary.
• He also questioned infant vaccination practices, asserting there is no reason to give newborns the hepatitis B vaccine and suggesting delaying it until age 12.
• The administration spotlighted leucovorin as a potential intervention, as the FDA the same day posted a Federal Register notice related to a leucovorin product for rare cerebral folate deficiency.
• Major medical societies and researchers said the evidence does not show a causal link, citing a 2024 Swedish JAMA sibling study, and ACOG advised that guidance remains unchanged and warned against risks from untreated fever in pregnancy.
• Tylenol maker Kenvue rejected the suggested link and its shares fell about 7.5% on the announcement day, while prior U.S. lawsuits alleging acetaminophen caused neurodevelopmental harm were dismissed with appeals still pending.