Evaluating the Role of Susceptibility Inducing Cofactors and of Acetaminophen in the Etiology of Autism Spectrum Disorder Public advisory Think twice before injecting peptides bought online: unauthorized products can seriously harm you 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 Acetaminophen causes neurodevelopmental injury in susceptible babies and children: no valid rationale for controversy