Report acetaminophen intake above 4 grams per day or signs of liver injury.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A nurse is caring for a client receiving acetylcysteine by nebulizer as a mucolytic. Which finding should the nurse anticipate or monitor for during administration?
Answer: A. Acetylcysteine is a mucolytic that breaks down thick respiratory secretions; it has a characteristic rotten-egg (sulfur) odor and can trigger bronchospasm, so a bronchodilator may be given with it, especially in clients with asthma. The nurse should monitor for bronchospasm and increased secretions that may need suctioning. It does not cause the other listed effects as expected findings.
Question 2 of 5
A client who chronically misuses acetaminophen-containing opioid combination products is at risk for which serious complication from the acetaminophen component?
Answer: A. Many opioid combination products contain acetaminophen, and chronic excess intake or overdose can cause hepatotoxicity and acute liver failure. N-acetylcysteine is the antidote for acetaminophen toxicity. The acetaminophen component is not associated with renal stones, hyperkalemia, or pulmonary fibrosis as the primary toxic effect.
Question 3 of 5
A client took an overdose of acetaminophen. Which antidote does the nurse anticipate?
Answer: B. N-acetylcysteine (NAC) is the antidote for acetaminophen toxicity; it protects the liver. Naloxone is for opioids, vitamin K for warfarin.
Question 4 of 5
A nurse reviews the medications of a client taking an opioid. Which combination product requires the nurse to monitor closely for unintentional acetaminophen overdose?
Answer: A. Many opioid combination products such as hydrocodone-acetaminophen and oxycodone-acetaminophen contain acetaminophen. The nurse must count all acetaminophen sources to avoid exceeding the daily limit and causing liver injury.
Question 5 of 5
A nurse is reviewing a client's home medications and notes acetaminophen, a prescription opioid-acetaminophen combination, and a cold remedy. What is the nurse's priority concern?
Answer: A. Multiple products containing acetaminophen can together exceed the 4 g daily maximum and cause hepatotoxicity. The priority is to total the acetaminophen across all products and teach the client to read labels. The opioid dependence, constipation, and cold symptoms are secondary to the immediate hepatotoxic risk.
Keep the streak going with more questions like these, each with a full rationale.
What is acetaminophen and n-acetylcysteine?
Overdose depletes glutathione and produces a toxic metabolite that damages the liver. Memory aid: 'N-AC saves the liver.' Key principle: give NAC early, ideally within 8-10 hours of ingestion.
Key points to remember
- The maximum acetaminophen dose for healthy adults is generally 4 grams per day, less with liver disease or alcohol use.
- Overdose causes hepatotoxicity; liver damage may be delayed, so early symptoms can be minimal.
- N-acetylcysteine is the antidote and works best within 8-10 hours of ingestion.
- Acetaminophen is hidden in many combination products, increasing accidental overdose risk.
- NAC replenishes glutathione to detoxify the harmful metabolite.
Nursing priorities
- Assess total daily acetaminophen intake from all sources, including combination products.
- For overdose, administer N-acetylcysteine promptly and monitor liver function.
- Monitor for hepatotoxicity: elevated AST/ALT, jaundice, and right upper quadrant pain.
- Obtain a serum acetaminophen level timed from ingestion to guide treatment.
- Manage NAC nausea and the rotten-egg odor; give oral doses with juice or via NG tube.
Labs & values
Patient teaching
- Do not exceed 4 grams of acetaminophen per day; check all products for hidden acetaminophen.
- Avoid alcohol while taking acetaminophen.
- Seek care immediately after any suspected overdose, even if you feel fine.
Red flags: report now
- Report acetaminophen intake above 4 grams per day or signs of liver injury.
- Give the antidote early; delay past 8-10 hours reduces effectiveness.
- Report jaundice, confusion, or right upper quadrant pain (hepatotoxicity).
References
Clinical references for this topic
