After reviewing the patient's chart, which medications should the nurse administer?

A. Acetaminophen: The patient may be experiencing discomfort or mild pain from abdominal cramping and systemic illness. Acetaminophen is appropriate for pain and fever management in elderly patients with hypotension and renal considerations, as it avoids the gastrointestinal and renal risks associated with NSAIDs. B. Metronidazole: The stool test is positive for Clostridioides difficile toxin, confirming C. difficile infection. Metronidazole is an appropriate first-line antibiotic for mild to moderate C. difficile colitis, targeting the underlying bacterial cause and helping prevent further systemic complications. C. Furosemide: The patient is hypotensive (BP 92/58 mmHg) and shows signs of dehydration and poor perfusion. Administering a diuretic like furosemide would worsen hypovolemia and could precipitate shock, so it is contraindicated. D. Ondansetron: The patient is experiencing vomiting, which can worsen dehydration and electrolyte imbalances. Administering ondansetron can control nausea and vomiting, improving oral intake tolerance and aiding in overall fluid and electrolyte management. E. Potassium chloride: Laboratory results reveal hypokalemia (K⁺ 3.0 mEq/L), which is clinically significant and can lead to cardiac arrhythmias, especially in a patient with fatigue and hypotension. Administering potassium chloride corrects the deficiency and helps stabilize cardiac and neuromuscular function.