Overview

• At a White House event, President Trump said prenatal acetaminophen use may be associated with autism and recommended limiting Tylenol in pregnancy to cases deemed medically necessary.
• Trump also questioned giving the hepatitis B vaccine at birth, suggesting delays to age 12, a stance contradicted by standard immunization guidance and public‑health experts.
• The FDA published a Federal Register notice approving a leucovorina formulation for cerebral folate deficiency, which the administration highlighted as potentially relevant to autism symptoms despite only preliminary evidence.
• The World Health Organization, ACOG and independent scientists rejected a causal link, citing inconsistent data and a 2024 Swedish JAMA sibling‑comparison study of about 2.4 million births that found no effect of prenatal acetaminophen on autism, ADHD or intellectual disability.
• Kenvue, maker of Tylenol, strongly denied any causal connection and its shares fell on the announcement, while clinicians warned that discouraging acetaminophen could risk harm from untreated maternal fever and pain.