Overview

• President Trump used a White House briefing to assert a link between maternal acetaminophen use and autism and urged pregnant patients to avoid Tylenol.
• HHS Secretary Robert F. Kennedy Jr. promoted leucovorin as a therapy to study for autism and referenced an FDA notice citing small studies in children and adults.
• The American College of Obstetricians and Gynecologists reiterated that acetaminophen remains the preferred pain reliever in pregnancy when used as directed.
• Kenvue, the maker of Tylenol, rejected any causal link to autism and warned that discouraging use could leave pregnant patients with riskier alternatives or untreated fever and pain.
• Researchers highlighted conflicting evidence, noting earlier associations in observational work and a 2024 sibling-controlled analysis that weakened an autism link; Trump also questioned newborn hepatitis B vaccination, in contrast to guidance to immunize at birth.