A federal appeals court has revived more than 500 lawsuits alleging that prenatal use of Tylenol is linked to autism and attention deficit hyperactivity disorder (ADHD) in children.
According to the report, the 2nd U.S. Circuit Court of Appeals ruled that a lower court improperly excluded testimony from three expert witnesses presented by parents and guardians pursuing the claims.
The report said the appellate court determined the experts relied on scientific methods that are accepted within the research community, even though scientists continue to disagree over their conclusions.
According to the report, there is no firm scientific evidence establishing a causal link between acetaminophen and autism.
Medical organizations continue to recommend acetaminophen, the active ingredient in Tylenol, as the preferred medication for treating pain and fever during pregnancy.
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US appeals court revives hundreds of private lawsuits linking Tylenol to autism https://t.co/yaTJQh6IY0 https://t.co/yaTJQh6IY0
— Reuters (@Reuters) July 13, 2026
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