What is the most serious side effect associated with Acetaminophen use?

What is the most serious side effect associated with Acetaminophen use?

• A. Hepatotoxicity
• B. Renal failure
• C. GI bleeding
• D. Hypertension

Answer: (A)

Acetaminophen’s most serious safety concern is hepatotoxicity. Under normal use, most of the drug is processed safely, but a small portion is converted by liver enzymes into a highly reactive metabolite. This metabolite is normally neutralized by glutathione, but when taken in overdose or in states that deplete glutathione (such as fasting, chronic alcohol use, malnutrition, or existing liver disease), glutathione stores fall and the reactive metabolite accumulates, damaging liver cells and potentially causing acute liver failure. This risk is why dosing guidelines are important and why overdose is treated promptly with N-acetylcysteine, which replenishes glutathione and helps detoxify the toxin. While renal injury can occur in severe cases, and GI issues or hypertension may arise rarely, hepatotoxicity remains the most serious and characteristic adverse effect of acetaminophen.

Acetaminophen’s most serious safety concern is hepatotoxicity. Under normal use, most of the drug is processed safely, but a small portion is converted by liver enzymes into a highly reactive metabolite. This metabolite is normally neutralized by glutathione, but when taken in overdose or in states that deplete glutathione (such as fasting, chronic alcohol use, malnutrition, or existing liver disease), glutathione stores fall and the reactive metabolite accumulates, damaging liver cells and potentially causing acute liver failure. This risk is why dosing guidelines are important and why overdose is treated promptly with N-acetylcysteine, which replenishes glutathione and helps detoxify the toxin. While renal injury can occur in severe cases, and GI issues or hypertension may arise rarely, hepatotoxicity remains the most serious and characteristic adverse effect of acetaminophen.