Should you take TYLENOL after a vaccination? TYLENOL Is Tylenol Safe During Pregnancy? Risk Factors, Not Causation Parents are rightly confused about vaccines, Tylenol, and autism right now. They just want to do what's right for their kids. Here's what to know: Vaccines are safeno link to autism Years ago, Dr. Sherri Tenpenny warned about the risks of Tylenol, particularly its impact on glutathione levels, the detoxifier in our bodies. Recent revelations by both President Trump and RFK Jr. have Researchers are studying a possible link between acetaminophen (Tylenol) use during pregnancy and higher autism or ADHD risk. It may lower glutathione, an important antioxidant for brain development.