Which monitoring is prudent with chronic high-dose acetaminophen use?

• A. Liver enzymes
• B. Renal function
• C. Complete blood count
• D. Electrolyte panel

Answer: (A)

Chronic high-dose acetaminophen primarily threatens the liver because metabolism converts much of the drug into a toxic intermediate that can overwhelm the liver’s detox systems. When intake is high or prolonged, glutathione stores can be depleted and hepatocellular injury can develop, sometimes with little warning. That’s why checking liver function is the prudent monitoring approach: looking at liver enzymes (like ALT and AST), bilirubin, and coagulation status helps detect hepatotoxicity early and guides management, including potential use of antidotes if injury is suspected.

Renal function, while important in overall patient care, is less specific for acetaminophen toxicity and isn’t the main focus for monitoring chronic high-dose use. A complete blood count or electrolyte panel isn’t diagnostic for acetaminophen-induced liver injury, though they may be useful for broader clinical assessment in certain patients.