Leucovorin May Have Promise In Autism, But Science Is Far From Settled

Washington DC – On Monday, Sept. 22, 2025, President Donald Trump said his administration was linking acetaminophen, the active ingredient in Tylenol, to autism and urging pregnant women to largely avoid the medication. At the same time, the Food and Drug Administration is approving use of leucovorin for autism. Photographer: Francis Chung/Politico/Bloomberg

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