Controversy Surrounds Tylenol Use During Pregnancy and Autism Claims

The Trump administration's recent claims linking acetaminophen, the active ingredient in Tylenol, to autism have ignited significant controversy. This narrative centers around the involvement of Dr. Andrea Baccarelli, dean of the Harvard T.H. Chan School of Public Health, whose research has been cited by the administration to support these claims, despite previous legal challenges to his testimony regarding Tylenol's safety.

STAT (News)

Dr. Andrea Baccarelli has emerged as a central figure in this debate. Previously a professor at Columbia University, he was paid at least $150,000 to provide expert testimony for plaintiffs in lawsuits against Tylenol's manufacturer, Kenvue. His testimony was dismissed by U.S. District Judge Denise Cote, who criticized him for "cherry-picking" data and failing to account for genetic factors in autism's etiology. The Trump administration, including Health Secretary Robert F. Kennedy Jr. and FDA Commissioner Dr. Marty Makary, has heavily relied on Baccarelli's research to advocate for caution regarding Tylenol use during pregnancy.

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During a press conference on September 22, 2025, President Trump advised pregnant women to avoid Tylenol, stating, “Don’t take Tylenol. There’s no downside.” He claimed that the FDA would update acetaminophen labels to reflect these purported risks. However, the FDA's own communications clarified that while associations between acetaminophen and autism have been noted, a causal relationship has not been established. Baccarelli himself stated that further research is necessary to confirm any association, emphasizing caution in acetaminophen use during pregnancy.

Fact CheckABC NewsMedia Claims ‘No Science’ Linking Tylenol to Autism — But Studies by Major Medical Institutions Raise Red Flags

Numerous medical organizations, including the American Academy of Pediatrics and the Society for Maternal-Fetal Medicine, have criticized the administration's claims. They argue that the evidence does not support a causal link between acetaminophen and autism, warning that Trump's statements could lead to unnecessary fear and confusion among expectant mothers. Critics have pointed out that untreated pain or fever during pregnancy can pose significant risks to both mother and child.

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The scientific community remains divided on the issue. While some studies suggest a potential link between prenatal acetaminophen use and neurodevelopmental disorders, others, including a large 2024 study of 2.5 million children in Sweden, found no such association. The inconsistency in findings highlights the need for further research to clarify the relationship between acetaminophen and autism.

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As the appeals court considers the dismissal of lawsuits against Kenvue, plaintiffs' attorneys are urging the court to take into account the Trump administration's recent stance on acetaminophen. The ongoing debate over the safety of Tylenol during pregnancy continues to evolve, with calls for more rigorous scientific investigation into its potential effects on fetal development.

The Straits Times

• “Further research is needed to confirm the association and determine causality, but based on existing evidence, I believe that caution about acetaminophen use during pregnancy — especially heavy or prolonged use — is warranted.” — Dr. Andrea Baccarelli, Dean, Harvard T.H. Chan School of Public Health

ABC Denver 7 KMGH

• “ In response to Monday’s White House announcement, a Kenvue spokesperson said: “The facts are that over a decade of rigorous research, endorsed by leading medical professionals and global health regulators, confirms there is no credible evidence linking acetaminophen to autism.” — Kenvue spokesperson

New York Post

This ongoing situation underscores the complexities of medical advice and public health policy, particularly regarding widely used medications like acetaminophen during pregnancy.

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