Understanding the Impact of Acetaminophen: Tylenol and Glutathione in Autism 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 & The FDA is signaling that perhaps immediate treatment with acetaminophen is less clearly needed for a low grade fever, especially in pregnancy, unless theres a stronger indication for it., Safer Is Tylenol Safe During Pregnancy? Risk Factors, Not Causation