Final answer:
The nurse should anticipate administering Acetylcysteine.
Step-by-step explanation:
The nurse should anticipate administering Acetylcysteine to a client with acute acetaminophen toxicity. Acetylcysteine is the antidote for acetaminophen overdose. It works by replenishing glutathione stores in the liver, which helps to prevent liver damage caused by acetaminophen. It is important to administer Acetylcysteine within a specific time frame after acetaminophen overdose to be effective in preventing liver damage.