U.S. Health and Human Services Secretary Robert F. Kennedy Jr. addressed growing public concern over prenatal Tylenol use during a press conference this week, acknowledging that current scientific evidence suggests—but does not prove—a possible link between acetaminophen exposure in pregnancy and developmental disorders such as autism.

“The causative association between Tylenol given in pregnancy and the perinatal periods is not sufficient to say it definitely causes autism, but it is very suggestive,” Kennedy said. “Physicians should continue to exercise caution and minimize use unless absolutely necessary.”

The remarks come amid renewed debate in the medical community following the release of several 2025 studies examining acetaminophen’s potential neurodevelopmental effects. A recent Mount Sinai study found a possible association between prenatal exposure and increased risks of autism and ADHD, prompting the FDA to initiate a label safety review. However, Kennedy was careful to emphasize that the data remains mixed and inconclusive.

Major health organizations, including the World Health Organization (WHO), the American College of Obstetricians and Gynecologists (ACOG), and the Society for Maternal-Fetal Medicine (SMFM), maintain that there is no established causal evidence linking Tylenol to autism. They continue to endorse acetaminophen as a safe and effective option for managing fever and pain during pregnancy when used responsibly.

As Secretary of HHS, Kennedy’s statement reflects a balanced approach—urging medical caution while discouraging public alarm. His comments signal a broader effort by the Trump administration to ensure medical transparency and protect maternal and child health through evidence-based oversight.

The administration has made it clear that it will continue reviewing new data while defending the integrity of scientific inquiry against politicized narratives. Kennedy’s call for prudence underscores a commitment to both safety and personal responsibility—core values that have defined the administration’s public health stance.