Acetaminophen is particularly toxic to which organ?

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Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Multiple Choice

Acetaminophen is particularly toxic to which organ?

Explanation:
Acetaminophen toxicity mainly affects the liver because of how it’s metabolized in that organ. Most of the drug is safely processed, but a fraction is converted by liver enzymes into a reactive metabolite (NAPQI). In an overdose, glutathione stores in the liver are overwhelmed, so NAPQI binds to cellular proteins and causes hepatocellular injury, especially in the central zones of the liver lobules, leading to necrosis and elevated liver enzymes. While kidney injury can occur in severe cases, the hallmark organ for acetaminophen toxicity is the liver. An antidote like N-acetylcysteine works by replenishing glutathione to detoxify NAPQI.

Acetaminophen toxicity mainly affects the liver because of how it’s metabolized in that organ. Most of the drug is safely processed, but a fraction is converted by liver enzymes into a reactive metabolite (NAPQI). In an overdose, glutathione stores in the liver are overwhelmed, so NAPQI binds to cellular proteins and causes hepatocellular injury, especially in the central zones of the liver lobules, leading to necrosis and elevated liver enzymes. While kidney injury can occur in severe cases, the hallmark organ for acetaminophen toxicity is the liver. An antidote like N-acetylcysteine works by replenishing glutathione to detoxify NAPQI.

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