Overview
Introduction
Acetaminophen toxicity is a timing problem disguised as a minor illness.
Acetaminophen toxicity is a timing problem disguised as a minor illness. During the first several hours, a patient may have only nausea—or no symptoms at all—while the liver is converting excess acetaminophen into the reactive metabolite N-acetyl-p-benzoquinone imine (NAPQI). Once glutathione is depleted, NAPQI begins damaging hepatocytes, and the clinical picture may worsen after the opportunity for easy prevention has narrowed. The nurse therefore does not use the patient's early appearance to estimate risk. The useful questions are: How much was taken? When? Was it a single ingestion or repeated doses? Which products were involved? Those answers determine whether the serum concentration can be interpreted on a nomogram, whether NAC should begin before the result is available, and how urgently the patient needs higher-level care.