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 Autism and Tylenol: Exploring the Evidence on Acetaminophen in Pregnancy NAM Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors PDF] Evidence that Increased Acetaminophen use in Genetically Vulnerable Children Appears to be a Major Cause of the Epidemics of Autism, Attention Deficit with Hyperactivity, and Asthma Semantic Scholar