Lawsuits claiming Tylenol causes autism lack scientific support, judge finds
Quote:
A judge has barred expert witnesses from testifying that Johnson & Johnson (JNJ.N) spin-off Kenvue's (KVUE.N) painkiller Tylenol can cause autism if mothers take it during pregnancy, finding that they failed to support their conclusions with scientific evidence.
The ruling on Monday by U.S. District Judge Denise Cote in Manhattan federal court likely means the end of a consolidated mass tort litigation of about 500 lawsuits over the popular over-the-counter drug, unless plaintiffs get it reversed on appeal.
Cote, in a 148-page ruling, found that none of the five expert witnesses proposed by the plaintiffs had offered a sound scientific methodology to support their opinion that Tylenol's active ingredient, acetaminophen, could cause autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD).
"Instead, the unstructured approach adopted by the plaintiffs' experts permitted cherry-picking, allowed a results-driven analysis, and obscured the complexities, inconsistencies, and weaknesses in the underlying data," she wrote.
Kenvue, which was Johnson & Johnson's consumer health unit before it was spun off in August, in a statement said it will move to dismiss all the cases in light of the ruling. Its shares rose about 4% in Tuesday trading following the decision.
Lawyers for the plaintiffs did not immediately respond to requests for comment.
Product liability lawsuits, like the ones over Tylenol, rely on experts to establish that the product is capable of causing the alleged harm. Federal judges decide what expert testimony is allowed, based on whether it meets scientific standards first laid out by the U.S. Supreme Court in its 1993 ruling in Daubert v. Merrell Dow Pharmaceuticals.
The multidistrict litigation was consolidated before Cote in October 2022. Plaintiffs had begun filing lawsuits earlier that year, claiming that the retailers failed to warn pregnant users of acetaminophen products about the neurological risks to the fetus.
Health experts advise pregnant women to take acetaminophen rather than aspirin or ibuprofen, which can cause fetal organ damage.
While some studies have found an association between the disorders and acetaminophen use in pregnancy, researchers have cautioned that other, underlying factors could be responsible and that more study is needed.
_________________
Professionally Identified and joined WP August 26, 2013
DSM 5: Autism Spectrum Disorder, DSM IV: Aspergers Moderate Severity
“My autism is not a superpower. It also isn’t some kind of god-forsaken, endless fountain of suffering inflicted on my family. It’s just part of who I am as a person”. - Sara Luterman