Major global health organizations, including the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA), and the World Health Organization (WHO), do not recognize autism as a known adverse drug reaction (ADR) of paracetamol.
Review of Studies
The controversy largely stems from observational studies (not clinical trials) that suggested a potential association between prenatal exposure to paracetamol and a slightly increased risk of neurodevelopmental disorders, including autism spectrum disorder (ASD) and ADHD.
Examples of Observational Studies:
A 2021 meta-analysis in the European Journal of Epidemiology reported an association between prenatal paracetamol use and increased risks of ASD and ADHD.
A 2019 study in JAMA Psychiatry also suggested a potential link.
- A 2016 systematic review and meta-analysis” in American Journal of Epidemiology “Prenatal exposure to acetaminophen and risk of attention deficit hyperactivity disorder and autism spectrum disorder”
- However, these studies have significant limitations:
- They cannot prove causation — only correlation.
- Confounding factors (e.g., the underlying reason for taking paracetamol, such as fever or infection during pregnancy) may influence results.
- Recall bias and methodological variability weaken conclusions.
No study to date has proven a causal relationship between paracetamol and autism. Other unmeasured factors (like the underlying reason for taking the medicine or genetic factors) may explain this association.
FDA & EMA:
Both agencies have reviewed available data and concluded that evidence is insufficient to establish a causal link. They continue to recommend paracetamol as a first-line treatment for pain and fever during pregnancy when used as directed.
WHO:
Includes paracetamol on its Model List of Essential Medicines and has not issued warnings regarding autism.
“Paracetamol remains an important option to treat pain or fever in pregnant women. Our advice is based on a rigorous assessment of the available scientific data and we have found no evidence that taking paracetamol during pregnancy causes autism in children.”
EMA’s Chief Medical Officer, Steffen Thirstrup
Recent Large-Scale Study (2024)
A large sibling-controlled study published in JAMA in 2024 found no evidence that prenatal paracetamol exposure causes autism, ADHD, or intellectual disability.
This study compared siblings exposed and unexposed to paracetamol in utero, controlling for genetic and environmental factors.
It concluded that earlier observed associations were likely due to confounding factors.
Conclusion
✅ Based on current evidence, paracetamol (Panadol) is not considered a cause of autism.
✅ It remains one of the safest choices for pain and fever relief when used at recommended doses.
✅ When needed, paracetamol can be used during pregnancy. As with any medicine for acute treatment, it should be used at the lowest effective dose, for the shortest possible time and as infrequently as possible.
✅ Pregnant women should speak to their healthcare professional if they have questions about any medication during pregnancy.
