Comment from Americans for Scientific Integrity
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Summary: The commenter cites a new study on rodent models showing that in utero exposure to acetaminophen can cause brainstem impairment and neuron loss in offspring. They argue that these findings support the need for both pregnancy and pediatric warnings to ensure informed use during early-life development.
This newly published study, “Vestibular brainstem impairment following in utero exposure to high dose paracetamol” (Graeca et al., 2026), demonstrates that in utero exposure to acetaminophen produced measurable structural and functional impairment of the developing brainstem, including significant neuron loss and sensorimotor deficits, even in the absence of overt growth abnormalities. While derived from a rodent model, these findings are highly relevant to pediatric risk because they highlight the vulnerability of the developing brain during periods when metabolic detoxification pathways remain immature, suggesting that susceptibility to injury may extend beyond birth into early childhood. Accordingly, these data support not only a precautionary pregnancy warning but also consideration of a pediatric warning to ensure informed use during early-life developmental windows.