President Trump's announcement last week linking Tylenol with autism could play a role in ongoing legal cases against the company that makes it. During the press conference, officials said the Food and Drug Administration would begin the process of updating the safety label for Tylenol and acetaminophen. "So taking Tylenol is not good," the president told reporters. Keller says he filed what was among the first lawsuits alleging that prenatal acetaminophen exposure caused autism or ADHD. As for Kenvue, it issued a statement saying it disagrees with any suggestion that taking acetaminophen causes autism, because decades of scientific research show that it is safe.