Correct Answer: A

Rationale: Naloxone is the correct answer. Naloxone is the antidote for opioid overdose, including hydromorphone. Opioids can cause respiratory depression, and a significant decrease in respiratory rate from 16 to 6 breaths per minute indicates respiratory compromise. Naloxone should be administered promptly to reverse the effects of the opioid and restore normal respiratory function. Flumazenil (Choice B) is used to reverse the effects of benzodiazepines, not opioids. Activated charcoal (Choice C) is used for gastrointestinal decontamination in cases of overdose with certain substances, but it is not the appropriate intervention for opioid-induced respiratory depression. Aluminum hydroxide (Choice D) is an antacid and has no role in managing opioid overdose or respiratory depression.

Correct Answer: B

Rationale: The correct answer is B: 'Monitor for constipation.' Calcium carbonate can cause constipation as a side effect. Educating clients on dietary adjustments, such as increasing fluid intake and fiber consumption, can help alleviate this issue. Choice A is incorrect because calcium carbonate supplementation is used to treat hypocalcemia, not cause it. Choice C is incorrect because calcium carbonate should be taken with food for optimal absorption. Choice D is incorrect because calcium carbonate is available over the counter, not as a prescription medication.

Correct Answer: C

Rationale: The correct answer is to advise the client to avoid potassium supplements. Spironolactone is a potassium-sparing diuretic, meaning it helps the body retain potassium. Adding potassium supplements on top of this medication can lead to hyperkalemia, an elevated level of potassium in the blood, which can be dangerous. Choices A, B, and D are incorrect because increasing potassium-rich foods, limiting sodium intake, and increasing protein intake are not specifically related to the dietary considerations when taking spironolactone.

Correct Answer: A

Rationale: Corrected Rationale: Digitalis toxicity is a serious complication of digoxin therapy, particularly in older adults. Early symptoms include anorexia, nausea, and generalized weakness. Anorexia and weakness are common indicators of digitalis toxicity. Hyperactivity, hunger, tachycardia, increased urination, polyphagia, and polydipsia are not typical signs of digitalis toxicity. Monitoring for anorexia and weakness can help detect toxicity early and prevent life-threatening arrhythmias.

Correct Answer: A

Rationale: Corrected Rationale: Metoprolol is a beta-blocker commonly used to treat conditions like hypertension and angina. As a beta-blocker, it primarily affects the cardiovascular system by reducing heart rate and blood pressure. Therefore, the nurse should monitor the client's blood pressure regularly to assess the drug's effectiveness and ensure that it is within the therapeutic range. Monitoring liver function, serum potassium levels, or blood glucose is not typically required for clients taking metoprolol, as its primary impact is on the heart and blood vessels, making choice A the most appropriate monitoring parameter.