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President Donald Trump speaks during an announcement about autism, at the White House on Sept. 22, 2025. Andrew Harnik/Getty Images
President Donald Trump speaks during an announcement about autism, at the White House on Sept. 22, 2025. Andrew Harnik/Getty Images
Health Secretary Robert F. Kennedy Jr. and other officials announced on Sept. 22 that acetaminophen, the active ingredient in Tylenol, may be associated with autism, a disorder with a wide range of symptoms. They also said that leucovorin, or prescription folinic acid, looks like a promising therapy for autism.
Here’s what to know about the new announcement, autism, and folinic acid.
Tylenol Link
Officials said the available evidence regarding a link between acetaminophen, also known as paracetamol, and neurodevelopmental disorders is sufficient to issue a new warning against using acetaminophen during pregnancy.
