When Good Drugs Go Bad: Acetaminophen Toxicity tl;dr pharmacy Acetaminophen Pathway (toxic doses), Pharmacokinetics Reaching for Tylenol when baby is fussy? Here's some information worth knowing. A baby's liver isn't fully mature until around 2 years old Meaning their ability to process certain substances is still They told us Tylenol is safe. Pediatricians recommend them daily. But what if we've been missing the full story? Research shows that frequent use of acetaminophen (Tylenol) in babies and children Yes there is good evidence that acetaminophen (the active ingredient in Tylenol) can deplete glutathione under certain conditions. But whether that matters depends on dose, duration, and individual factors. Solved The following figure shows the metabolism of the Chegg.com