Tylenol (acetaminophen) does not cause autism. The FDA, in its statement that there may be an association, confirmed that "a causal relationship has not been established, and studies of millions of children What the research says about autism and acetaminophen use during pregnancy Yale School of Public Health The impact of glutathione metabolism in autism spectrum disorder ScienceDirect Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors The role of oxidative stress, inflammation and acetaminophen exposure from birth to early childhood in the induction of autism William Parker, Chi Dang Hornik, Staci Bilbo, Zoie E. Holzknecht, Lauren Gentry, Pediatric doctor discusses 20 year awareness of Tylenol's role in autism risk factors