Lancet Study: Tylenol Pregnancy and Autism Risk – No Link Found
- Acetaminophen use during pregnancy is not likely to raise the risk of having a child with autism, ADHD, or intellectual disability, according to a new study published Friday.
- Researchers across Europe reexamined evidence from multiple studies investigating the link between these conditions and the use of paracetamol - called acetaminophen in the United States - and...
- Acetaminophen, the active ingredient in Tylenol, has long been a frontline medication for relieving pain or fever in people who are pregnant.
Acetaminophen use during pregnancy is not likely to raise the risk of having a child with autism, ADHD, or intellectual disability, according to a new study published Friday.
Researchers across Europe reexamined evidence from multiple studies investigating the link between these conditions and the use of paracetamol – called acetaminophen in the United States – and found that these purported associations fell apart after controlling for confounding factors.
Acetaminophen, the active ingredient in Tylenol, has long been a frontline medication for relieving pain or fever in people who are pregnant. The scientific literature shows that this practice shouldn’t change, said co-author Asma Khalil, obstetrics and maternal fetal medicine professor at St. George’s Hospital,University of London.
“The message really is clear,” said Khalil. “Paracetamol remains a safe option during pregnancy when taken as guided - for the duration that’s needed, with a correct dose.”
Autonomous health experts praised the study’s methods and conclusions, which diverge sharply from the recommendations offered by President Trump and top health officials in September, when they said that acetaminophen should be used only if absolutely needed during pregnancy and launched a nationwide public information campaign to inform doctors and families of the purported risk. Their proclamation came as part of their bid to find the cause of autism, which decades of research has already linked to primarily genetic factors.
The findings of this new study, published in The Lancet, are unlikely to change these recommendations. Health and Human Services officials said the study did not refute claims from other researchers.
“Many experts have expressed concern of the use of acetaminophen during pregnancy, including Dr.Andrea Baccarelli,the Dean of the harvard School of public health,” said HHS spokesperson Andrew Nixon.
the U.S. government is an outlier in discouraging acetaminophen use – the American College of Obstetricians and Gynecologists, its British counterpart the Royal College of Obstetricians and Gynaecologists, as well as the European Medicines Agency continue to recommend the drug as a first-line treatment for pain and fever in pregnant people.
The U.S. health officials’ stance that exposure to acetaminophen during pregnancy is associated with autism spectrum disorder spurred the European researchers into a new review of the available evidence. Acetaminophen is a critical tool for physicians, the go-to drug to use during pregnancy because other commonly available painkillers, such as Advil (ibuprofen), and opioid medications can put a fetus at risk of kidney damage, preterm birth, or even stillbirth.Acetaminophen is not just a pain reliever for people who are pregnant, it also mitigates fevers that can increase the likelihood of birth defects.
scientists have had ample time to investigate the potential adverse outcomes of acetaminophen, a drug first used clinically in
Subjectivity Remains in Meta-Analyses Despite Improvements
Despite established scientific methods for conducting reviews and meta-analyses, subjective interpretation remains a crucial component of the process. This acknowledges that while improvements have been made, complete objectivity is difficult to achieve in synthesizing research findings.
The Role of Interpretation
Lee, an expert in the field, stated that even with best practices, meta-analyses are “very much completely resulting from subjective interpretation.” this highlights the inherent challenge of combining data from diverse studies, each with its own methodologies and potential biases.
Comparison to Previous Research
The statement was made in comparison to a 2025 review by Prada and colleagues, which was described as ”horrifically inaccurate.” Diddier Prada is an assistant professor of population health science and policy at the Icahn School of Medicine at Mount Sinai. This comparison suggests that while subjectivity persists, newer analyses represent an improvement over earlier, flawed attempts.
Context of the Discussion
This discussion arose in the context of research surrounding potential links between autism and acetaminophen use during pregnancy, as explored in a STAT news article published on September 22, 2025. The article details the complexities of interpreting scientific evidence in this sensitive area.