NAPQI Alchetron, The Free Social Encyclopedia Solved The stepwise mechanism below shows how glutathione Chegg.com 3 Glutathione Rescue Normally, glutathione binds NAPQI and converts it into non toxic byproducts (cysteine + mercapturic acid) that are excreted. Example: Glutathione is your liver's safety net against toxins. An Example of a Drug That Causes Toxicity Through the Formation of a Chemically Reactive Intermediate Mechanisms of Adverse Drug Reactions Pharmacovigilance