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, Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health The Use of Tylenol in Pregnant Women and a Child Diagnosed with Autism or ADHD Heninger Garrison Davis Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors