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 Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health Acetaminophen MSK Medbullets Step 1 Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health Acetaminophen, also known as Tylenol, is used to help with pain & to reduce fever. However, taking too much acetaminophen can be harmful to the liver which filters out toxins &