Is Tylenol Safe During Pregnancy? Risk Factors, Not Causation Functional neurologist discusses Tylenol use after President Trump's big announcement linking Tylenol to autism The headline Tylenol causes autism has sparked concern. But the science tells a more nuanced story. Some observational studies have found that when pregnant women used more acetaminophen, their Mark Hyman, 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