Paracetamol (acetaminophen) toxicity occurs when the liver is overwhelmed by a toxic metabolite called N acetyl p benzoquinone imine (NAPQI), which is normally detoxified by glutathione. In overdose, glutathione is depleted, and NAPQI accumulates, leading Liver specific Bcl3 Knockout Alleviates Acetaminophen induced Liver Injury by Activating Nrf2 Pathway in Male Mice Cellular and Molecular Gastroenterology and Hepatology Acetaminophen (Paracetamol) Toxicity A common and potentially fatal cause of acute liver failure due to toxic accumulation of the metabolite NAPQI when glutathione stores are depleted. Early recognition and timely administration NAPQI Wikipedia