The Food and Drug Administration (FDA) defied the advice of its own drug safety experts to warn pregnant women about Tylenol for nearly a decade, internal reports and presentations obtained by the Daily Caller News Foundation reveal.
FDA rank-and-file scientists repeatedly recommended the agency release information about Tylenol in pregnancy across three scientific reviews conducted in 2016, 2019, 2022 and two memos, one from the FDA’s maternal health division in 2016 and one from the FDA’s urological health division in 2017.
The scientific literature posits many plausible drivers of autism, the most well-established of which are genetic, and the FDA drug safety experts acknowledged that the research linking the condition to Tylenol is far from ironclad.
Still, as alarm bells rang within FDA headquarters and the boardrooms of Tylenol’s manufacturers, pregnant women heard nothing from either the government or the manufacturers about the potential risks until the September announcement by President Donald Trump and Health and Human Services Secretary Robert F. Kennedy Jr.
FDA leadership declined to update its webpage about over-the-counter painkillers in pregnancy, repeatedly falling back on language first issued in January 2015. But that statement simply acknowledged that “FDA is aware of concerns” about Tylenol and attention deficit hyperactivity disorder (ADHD), citing just one scientific paper.
At the urging of Trump and Kennedy, FDA finally released a nuanced statement in September cautioning pregnant women about Tylenol while acknowledging that aspirin, ibuprofen and high fevers all pose their own risks. That move was first recommended by an FDA drug safety expert nine years earlier.
The DCNF obtained the FDA documents from the law firm Keller Postman LLC, which brought a class action lawsuit against Tylenol maker Kenvue, a legally independent spinoff of Johnson & Johnson. The personal injury law firm, which often brings class action lawsuits, obtained the documents from FDA via the Freedom of Information Act.
Tylenol, a brand name for acetaminophen, first received FDA approval in 1955 before modern drug laws tightened clinical trial requirements in 1962.
Some experts argue that neurological damage occurs due to a toxic byproduct of acetaminophen called NAPQI. Babies and children with autism may struggle to metabolize the drug, resulting in higher levels of NAPQI, which kills cells.
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