A nurse is caring for a client prescribed hydromorphone for severe pain. The client's respiratory rate has decreased from 16 breaths per minute to 6. Which of the following medications should the nurse prepare to administer?

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: Hypokalemia. Furosemide is a loop diuretic that can lead to potassium loss through urine, causing hypokalemia. Hyperkalemia (choice A) is not a side effect of furosemide. Hyponatremia (choice C) and hypernatremia (choice D) are related to sodium levels rather than potassium, and they are not typically associated with furosemide use.

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: C

Rationale: The correct answer is C: Tremors. Lithium toxicity can present with symptoms such as tremors, nausea, and blurred vision. Tremors are a common early sign of lithium toxicity and should be monitored closely. While nausea and vomiting can also occur with lithium toxicity, tremors are more specific to lithium toxicity. Increased urination is not typically associated with lithium toxicity, and blurred vision is less common compared to tremors in this context.

Correct Answer: C

Rationale: Corrected Rationale: Serum phenytoin levels should be regularly monitored to prevent toxicity because the therapeutic range is narrow. Monitoring blood pressure (choice A), complete blood count (choice B), and liver function tests (choice D) are not directly related to preventing phenytoin toxicity.