What is the Difference Between L glutamine vs Glutamine? NAcetylcysteine (NAC) is More Than Just an Antidote. NAC replenishes glutathione (GSH), breaks mucus disulfide bonds, and modulates glutamate. That's why it works in the liver, lungs, and brain. Owais PDF] Antidote for acetaminophen poisoning: N acetylcysteine Semantic Scholar When Tylenol (acetaminophen) is not properly metabolized, it creates a toxic biproduct. The process to metabolize acetaminophen is called glucuronidation. This process is underdeveloped in young babies.