Appeals Court Revives Tylenol Autism Lawsuits Against Kenvue

A federal appeals court has breathed new life into litigation accusing Kenvue of failing to disclose alleged risks tied to taking Tylenol during pregnancy, reversing an earlier ruling that had effectively stopped hundreds of cases, according to a new report from Bloomberg.

On Monday, the 2nd U.S. Circuit Court of Appeals concluded that the trial judge went too far in throwing out testimony from three expert witnesses. The panel said the experts relied on recognized scientific approaches and that disagreements over how to interpret the available research should be weighed through the legal process rather than dismissed outright. The lawsuits will now return to the lower court.

The decision overturns a 2023 ruling that prevented roughly 500 claims from moving forward against Kenvue, the consumer health business that was spun off from Johnson & Johnson. Bloomberg Intelligence has previously estimated that the company could ultimately face thousands of similar lawsuits, creating the potential for billions of dollars in legal exposure.

Bloomberg notes that attorneys representing the plaintiffs said the appeals court recognized that their experts relied on legitimate scientific evidence. Kenvue countered that the ruling was procedural, not a finding that Tylenol causes autism or ADHD. The company continues to argue that the best available independent research has not established a causal relationship between prenatal acetaminophen use and neurodevelopmental disorders.

Recall back in September we noted when President Donald Trump advised pregnant women to avoid Tylenol, bringing renewed public attention to a debate that has divided researchers.Even so, many medical experts and large reviews of existing studies continue to say the evidence does not demonstrate that acetaminophen use during pregnancy causes autism, ADHD, or similar developmental conditions.

"With Tylenol, don't take it, don't take it," Trump said last year, adding that the FDA would issue a notice to physicians over the risk of acetaminophen during pregnancy, and begin the process to make a safety label change. "I think we've found an answer to autism."

In October, we noted that in a Feb. 8, 2018, email obtained by The Epoch Times, Rachel Weinstein, director of epidemiology at Johnson & Johnson subsidiary Janssen, wrote, “The weight of evidence is starting to feel heavy to me.”

Weinstein was emailing Jesse Berlin, Johnson & Johnson’s global head of epidemiology, about a review that concluded that nine studies suggested that use of acetaminophen—the active ingredient in Tylenol—by pregnant women was linked to autism and other neurodevelopmental issues in the women’s children.

The legal battle is unfolding while Kimberly-Clark works to complete its planned $40 billion purchase of Kenvue. The company has said it reviewed the potential litigation risks before agreeing to the acquisition.