Final answer:
Acetylcysteine is the treatment of choice for acetaminophen overdose.
Step-by-step explanation:
Acetylcysteine is the treatment of choice for overdose of acetaminophen (4'-hydroxyacetanilide), which is commonly known as Tylenol. Acetylcysteine helps to prevent or reduce liver damage caused by acetaminophen overdose by increasing the production of a protective antioxidant called glutathione. It works by replenishing the depleted glutathione levels and helping the body metabolize the toxic byproduct of acetaminophen.