Full Breakdown
New Danish Study Finds No Link Between Acetaminophen Use During Pregnancy and Autism
4/14/2026, 1:49:56 AM
Overview of the Study Findings
A recent comprehensive study conducted in Denmark has concluded that the use of acetaminophen, commonly known as Tylenol, during pregnancy does not increase the risk of autism in children. The research, published in JAMA Pediatrics, analyzed data from over 1.5 million children born between 1997 and 2022, including 31,098 who were exposed to acetaminophen in utero. The study found that autism was diagnosed in 1.8% of children exposed to the drug, compared to 3% in those who were not exposed. This lack of association persisted even after accounting for various individual risk factors, including dosage and timing of exposure.
Background and Context
The findings come in the wake of heightened scrutiny regarding acetaminophen use during pregnancy, particularly following statements made by former President Donald Trump. In September 2025, Trump publicly cautioned against the use of Tylenol, suggesting a potential link to autism, which led to a notable decline in its prescription among pregnant women. A subsequent study indicated that orders for Tylenol in emergency rooms dropped by as much as 20% shortly after Trump's comments.
Official Statements & Responses
Health officials and researchers have emphasized the importance of acetaminophen as a safe option for pain relief during pregnancy. Jeremy Faust, an emergency physician, noted that Tylenol is often the safest choice for managing pain and fever in pregnant individuals. In contrast, the U.S. Food and Drug Administration (FDA) announced plans to revise acetaminophen's labeling to warn of potential risks, although this has been met with criticism from medical groups who argue that the claims lack a solid evidence base.
Criticism & Opposition
Critics of the FDA's announcement and Trump's statements argue that the evidence linking acetaminophen to autism is not conclusive. A 2025 review of existing studies suggested a possible association with neurodevelopmental disorders, but did not establish causation. Furthermore, some researchers have pointed out that the observed links in earlier studies may be confounded by factors such as the health conditions of pregnant women who use acetaminophen more frequently.
Conflicting Reports & Gaps
While the Danish study found no significant link between acetaminophen use and autism, a 2024 Swedish study reported a marginal association that disappeared when sibling comparisons were made. Additionally, a 2025 study from Japan also found no link between prenatal acetaminophen exposure and autism. These discrepancies highlight the ongoing debate and the need for further research to clarify the relationship between acetaminophen and autism.
Verbatim Quotes
“Overall, our findings showed no association between the use of acetaminophen during pregnancy and risk of autism in offspring,” — Kira Philipsen Prahm, MD, PhD, Copenhagen University Hospital Rigshospitalet
“Pain is, in itself, a problem,” — Jeremy Faust, Mass General Brigham
“Recent political statements, together with widespread media coverage, have directed attention to a potential link between acetaminophen and autism.” — Kira Philipsen Prahm, MD, PhD
What's Next
As the debate continues, further investigations and studies are anticipated to explore the implications of acetaminophen use during pregnancy. The FDA's planned label change and ongoing research efforts will likely shape future guidelines and public perceptions regarding the medication's safety.
