Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health Avoid Tylenol with vaccines. A key reminder often emphasized in vaccine education is to avoid using Tylenol (acetaminophen) alongside vaccination. Tylenol requires glutathione for proper metabolism in the body. When glutathione Could Tylenol be making your child's health worse? Acetaminophen is widely used for pain and fever relief, but research suggests it depletes glutathione, a powerful antioxidant essential for immune function, Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors