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 Hidden Impact of Acetaminophen Well Rooted TYLENOL [Acetaminophen APAP]why it may cause harm Tylenol should likely be avoided in excess by genetically vulnerable children. GENETICALLY VULNERABLE likely meanschildren with limited supplies of GLUTATHIONE. The problem with TYLENOL Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors Tylenol And Glutathione Invigor Medical