
New large study finds no link between prenatal acetaminophen use and autism
A large JAMA Internal Medicine study of more than 700,000 Hong Kong mother–child pairs found no association between in‑utero acetaminophen exposure and autism or ADHD, regardless of dose or timing; a sibling‑matched design and negative controls suggest prior links were due to familial confounding rather than a causal effect, aligning with similar studies from Sweden (2024) and Japan (2025).













