Overview

• President Trump doubled down in a Truth Social post, urging pregnant women to avoid Tylenol, telling parents not to give it to young children, and advising changes to MMR, chickenpox, and hepatitis B vaccination timing.
• The FDA told clinicians that a causal relationship between acetaminophen and autism has not been established, noting acetaminophen remains the only approved over‑the‑counter option for treating fever in pregnancy.
• Doctors report immediate fallout, including heightened parental anxiety, requests to delay or split routine childhood vaccines, and refusals of acetaminophen for standard neonatal treatments.
• Major experts and societies, including ACOG, emphasize that decades of research do not prove causation and continue to recommend judicious, medically supervised acetaminophen use when needed in pregnancy.
• Scrutiny of the administration’s evidence grew after reports that a researcher cited in support of the warning, Harvard’s Andrea Baccarelli, was paid at least $150,000 as an expert witness in Tylenol litigation, while large studies such as a 2024 Swedish analysis found no link.