Rotating to a different opioid is used because the tolerance that develops to one opioid doesn’t fully apply to another. This incomplete cross-tolerance means a new opioid can restore or improve analgesia and sometimes lessen adverse effects by offering a different pharmacologic profile and duration of action. In practice, you estimate the dose of the new opioid that would provide equivalent analgesia using established equianalgesic tables, then start with a conservative adjustment to account for incomplete cross-tolerance—typically reducing the calculated dose by about a quarter to half—and titrate carefully based on response and side effects. This approach also requires considering differences in routes of administration and pharmacokinetics, and close monitoring to avoid overdose or withdrawal. Other options are less appropriate because rotation is a recognized, useful strategy, it does affect analgesia and side effects, and it is not irreversible.

End-of-life care prioritizes comfort and the patient’s goals. When a patient requests hydration, the best course is to honor that preference with a palliative approach that aims to relieve thirst and dry mouth without adding burdens. This means offering limited, symptom-directed hydration (often through oral sips, ice chips, or humidified air, and only as desired by the patient) and closely monitoring for any adverse effects like added secretions, edema, or distress, with ongoing reassessment and adjustment as the situation evolves. The idea is to support comfort and respect the patient’s wishes rather than forcing fluids or ignoring hydration needs altogether.

Delirium in advanced dementia is usually driven by multiple reversible factors, so the best initial approach is to identify and treat those contributors while supporting the person’s sleep and environment. Start by reviewing for reversible causes such as infection, dehydration, electrolyte disturbances, hypoxia, pain, constipation, urinary retention, and medication effects or polypharmacy, and correct what you can. Nonpharmacologic strategies are prioritized: provide reorientation, maintain familiar routines, ensure adequate lighting during the day and a calm, quiet environment at night, promote regular meals and hydration, address comfort, and involve family to support the person’s sense of reality. If agitation or safety concerns persist after optimizing causes and environment, use a low-dose antipsychotic with careful monitoring. Reserve pharmacologic therapy for agitation or risk to self or others, and avoid benzodiazepines or long-acting sedatives as first-line treatments because they can worsen delirium and prolong confusion. The core idea is a structured, cause-focused, nonpharmacologic approach with cautious, monitored pharmacologic intervention only when necessary for safety.

Taking a broad, detailed history of nausea and vomiting is essential because these symptoms are often influenced by multiple interacting factors, and understanding their pattern helps reveal likely causes and guide management. The best approach asks about how consistent the vomiting is, how intense it feels, what makes it worse or better, how often it occurs, and how much is lost each time, along with how it relates to meals and to other symptoms. This patterning helps distinguish different scenarios—for example, vomiting that starts after meals and is tied to abdominal pain and constipation can point to a mechanical or functional gut issue, while vomiting that occurs with anxiety or stress suggests a psychosomatic or stress-related component, and vomiting with signs of infection points to gastroenteritis. Asking about the relationship to food, the presence of pain, constipation, infection, and anxiety provides important clues about contributing factors and potential reversible causes. It also helps assess dehydration risk by noting volume and frequency. Narrower focuses, like only onset time, only medications, or only hydration status, miss these broader connections and would not adequately inform treatment decisions such as antiemetics, hydration strategies, addressing constipation, or addressing anxiety.