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 Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health Debate Flares Over an Unproven Link Between Tylenol and Autism The New York Times Tylenol, Autism, and PregnancyThe Safe Way to Take it to Avoid the Potential Risk Dr. Malek's MTHFRSolve