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Research shows taking acetaminophen as directed during pregnancy doesn’t have a strong connection to ADHD or intellectual disabilities in children.
In A Nutshell
- A review of 43 studies found no meaningful link between acetaminophen (Tylenol) use during pregnancy and autism, ADHD, or intellectual disabilities in children when used as directed
- The most reliable studies compared siblings within the same family Ione exposed to the medication in the womb, one not) and found no difference in neurodevelopmental outcomes
- Earlier research suggesting a connection likely picked up on underlying conditions that prompted medication use (like fever or infection) rather than the medication itself
- Major medical organizations continue to recommend acetaminophen as the first-line pain and fever treatment during pregnancy
A large new review is bringing relief to pregnant women worried about taking Tylenol. Researchers found no meaningful link between the common pain reliever and autism, ADHD, or intellectual disabilities in children when the medication is used as directed.
The findings, published in The Lancet Obstetrics & Gynaecology, come after months of anxiety sparked by high-profile claims last September that raised fresh concerns about acetaminophen (the generic name for Tylenol, also called paracetamol) during pregnancy. Those warnings left many pregnant people uncertain about taking one of the few pain relievers doctors typically recommend.
An international research team led by Francesco D’Antonio from the University of Chieti in Italy and Asma Khalil from St George’s University Hospital in London reviewed 43 studies. What made this analysis particularly reassuring was its focus on sibling comparison studies. These studies compared children within the same family where one sibling was exposed to the medication in the womb and another wasn’t.
This approach helps control for genetics, family environment, and other shared factors that could confuse the results. When researchers used this method, they found no association between prenatal acetaminophen exposure and these neurodevelopmental outcomes.
Why Earlier Studies Looked Scarier Than They Were
So why did previous research suggest a connection? The answer comes down to a classic mix-up in health research.
It’s easy to see why earlier studies looked concerning. People usually take pain relievers for a reason: chronic pain, fever, infections, inflammation. Those underlying conditions, or the genes that make someone susceptible to them, may be what older research was actually picking up rather than the medication itself.
A Swedish study of 2.48 million births illustrated this clearly. When researchers compared siblings, the apparent risks faded. Similar results came from a large Japanese cohort, where small increases seen in standard analyses didn’t hold up when family factors were accounted for.
In other words, it likely wasn’t the Tylenol. It was everything else going on.
Acetaminophen During Pregnancy Still Recommended
The major medical organizations continue to recommend acetaminophen as a first-line option for fever and pain during pregnancy. The American College of Obstetricians and Gynecologists, the Royal College of Obstetricians and Gynaecologists, and the European Medicines Agency all maintain that when used appropriately, it remains the preferred choice.
The authors warn that discouraging appropriate use of acetaminophen could cause more problems than the drug itself. If you’re pregnant and sick with a fever, the bigger worry may be the untreated fever, which has been linked to miscarriage and preterm birth.
The research team searched medical databases and included only studies that accounted for other factors that might affect results. Their conclusion held consistent across different ways of analyzing the data, whether looking at only the most rigorous studies, only those with long-term follow-up, or the complete dataset.
The politicization of acetaminophen safety has created confusion for pregnant people and their doctors. This review offers clarity. When researchers used methods that better control for why women take pain medication in the first place, they found no association between appropriate acetaminophen use during pregnancy and increased risk of autism, ADHD, or intellectual disability.
The evidence supports what medical guidelines already say: acetaminophen remains a reasonable option for managing fever and pain during pregnancy when used as directed.
Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider about medication use during pregnancy. The research discussed examined associations and does not establish causation. Individual circumstances vary, and treatment decisions should be made in consultation with qualified medical professionals.
Paper Notes
Limitations: Many studies in the review relied on mothers’ memories of medication use rather than pharmacy records, which can be unreliable. Definitions of exposure varied widely. Some studies didn’t specify dosage, timing, or how long women took the medication. Outcome measurements differed across studies, and children were followed for different lengths of time. Sibling comparison studies, while methodologically stronger, include fewer children because they only count families where siblings had different exposures. The review could not assess publication bias because fewer than ten studies were included in each analysis.
Funding and Disclosures: The authors declared no competing interests and received no funding for this study. The research was conducted independently without financial support from pharmaceutical companies or other organizations.
Paper Citation: D’Antonio F, Flacco ME, Della Valle L, Prasad S, Manzoli L, Samara A, Khalil A. Prenatal paracetamol exposure and child neurodevelopment: a systematic review and meta-analysis. The Lancet Obstetrics & Gynaecology. Published online January 16, 2026. DOI: 10.1016/S3050-5038(25)00211-0. Authors are affiliated with University of Chieti (Italy), University of Ferrara (Italy), University of Liverpool (UK), St George’s University Hospital NHS Foundation Trust (UK), University of Bologna (Italy), Karolinska Institutet (Sweden), and University of Oslo (Norway).
