A client comes to the emergency department reporting accidental overdose of acetaminophen. The nurse should anticipate to administer

Introduction: Acetaminophen toxicity results in the accumulation of a toxic metabolite, NAPQI, which depletes hepatic glutathione stores and leads to centrilobular necrosis. Timely administration of a sulfhydryl donor is essential to neutralize the metabolite and prevent irreversible hepatic failure and subsequent multi-organ dysfunction. A. Acetylcysteine is the specific antidote for acetaminophen poisoning. It works by restoring hepatic glutathione levels, which allows the liver to safely conjugate the toxic metabolite NAPQI into a non-toxic form. It is most effective when administered within 8 to 10 hours of the initial ingestion. B. Protamine sulfate is the pharmacological antagonist used specifically to reverse the anticoagulant effects of heparin. It works by forming a stable salt complex with heparin molecules, neutralizing their ability to activate antithrombin III, and has no clinical utility in the management of an acetaminophen overdose. C. Vitamin K is the antidote used to reverse the effects of warfarin-induced anticoagulation by promoting the synthesis of clotting factors 2, 7, 9, and 10. While severe liver damage from acetaminophen can lead to coagulopathy, Vitamin K does not address the underlying mechanism of hepatocyte destruction. D. Flumazenil is a competitive benzodiazepine receptor antagonist used to reverse sedation or overdose caused by medications like diazepam or lorazepam. It acts specifically on the GABA receptor complex in the central nervous system and provides no therapeutic benefit for biochemical hepatic damage caused by acetaminophen.