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 Let's take a moment to review acetaminophen (paracetamol), which you likely know as Tylenol. The exact mechanism of action is unclear, but theories suggest it inhibits cyclooxygenase (COX) in the central nervous Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors Tylenol's Impact on Glutathione and Liver Damage