A nurse is monitoring a client who took an overdose of acetaminophen 72 hr ago. The nurse should identify which of the following findings as a manifestation of acetaminophen poisoning?

A. Xerostomia: Dry mouth is not a typical manifestation of acetaminophen poisoning. It is more often associated with medication side effects such as anticholinergics or dehydration, rather than liver toxicity from acetaminophen overdose. B. Constipation: Constipation does not commonly result from acetaminophen toxicity. Instead, gastrointestinal upset such as nausea, anorexia, and vomiting are more likely due to impaired liver function and toxin buildup. C. Vomiting: Acetaminophen overdose primarily affects the liver, leading to hepatotoxicity. By 72 hours, clinical signs such as vomiting, right upper quadrant pain, jaundice, and elevated liver enzymes can appear as manifestations of poisoning. D. Tinnitus: Tinnitus is more commonly associated with salicylate (aspirin) toxicity. Acetaminophen overdose does not typically cause auditory disturbances but instead presents with gastrointestinal and hepatic symptoms.