Comprehensive Review Finds No Clear Link Between Paracetamol Use in Pregnancy and Autism or ADHD in Children

A recent comprehensive review published in The BMJ has found no clear evidence linking paracetamol use during pregnancy to an increased risk of autism spectrum disorder (ASD) or attention-deficit/hyperactivity disorder (ADHD) in children. The study analyzed nine systematic reviews encompassing 40 observational studies on the subject. While some studies suggested a possible association, the overall quality of evidence was deemed low to critically low, with many failing to account for confounding factors such as family genetics and environmental influences.

Professor Shakila Thangaratinam from the University of Liverpool, a senior author of the review, stated that existing evidence does not support a link between paracetamol use during pregnancy and the development of autism or ADHD in children. She emphasized that if pregnant women need to take paracetamol for fever or pain, they should do so, as untreated high fever during pregnancy can be dangerous to the unborn baby.

The review also highlighted that studies accounting for familial and environmental factors found no significant association between prenatal paracetamol exposure and neurodevelopmental disorders. For instance, a large Swedish study involving 2.4 million children observed a marginal increase in autism and ADHD rates among those exposed to paracetamol in utero. However, when comparing siblings with differing exposure levels, the association disappeared, suggesting that genetic and environmental factors may play a more substantial role.

In light of these findings, medical experts continue to recommend paracetamol as the safest option for managing pain and fever during pregnancy. Professor Dimitrios Siassakos of University College London noted that paracetamol has been used by the majority of pregnant women globally for several decades without any impact on autism and ADHD. He also pointed out that untreated high temperatures and inflammation during pregnancy can negatively affect fetal and neonatal brain development.

The study underscores the importance of considering genetic and environmental factors when evaluating potential risks associated with medication use during pregnancy. It also highlights the need for high-quality research to inform clinical guidelines and reassure expectant mothers about the safety of commonly used medications like paracetamol.