US Health and Human Services Secretary Robert F. Kennedy Jr. plans to announce that the use of the over-the-counter painkiller Tylenol in pregnant women is potentially linked to autism, The Wall Street Journal reported on Friday, citing people familiar with the matter, without including evidence for the claims.
Kennedy, in a report, will also suggest that a drug derived from folate called folic acid could be used to treat symptoms of autism in some people, the WSJ reported.
Shares of Kenvue, the company that makes it, fell more than 6% after the news. Tylenol, whose active ingredient is acetaminophen, is a widely used pain reliever, including by pregnant women.
The report, expected this month from the U.S. Department of Health and Human Services, which Kennedy directs, is likely to highlight low levels of folate, an important vitamin, and Tylenol taken during pregnancy, as well as other possible causes of autism, the report said.
It's not the first time Kenvue or Johnson & Johnson have faced questions about the link between Tylenol and the condition. In 2023, a judge dismissed claims that the drug causes autism if mothers take it during pregnancy.