Correct Answer: A

Rationale: The correct answer is A: Hypokalemia. Furosemide, a loop diuretic, can lead to potassium loss in the urine, resulting in hypokalemia. This electrolyte imbalance is commonly seen in patients taking furosemide and requires close monitoring. Choices B, C, and D are incorrect because furosemide does not typically cause hyponatremia, hyperkalemia, or hypercalcemia as frequently as it causes hypokalemia.

Correct Answer: A

Rationale: Naloxone is the correct answer. Naloxone is the standard medication for reversing opioid overdose by blocking opioid receptors. Choice B, Epinephrine, is used to treat severe allergic reactions (anaphylaxis) and cardiac arrest, not opioid overdose. Choice C, Lidocaine, is a local anesthetic used for numbing purposes and managing certain types of arrhythmias, not for opioid overdose. Choice D, Atropine, is used to treat bradycardia, organophosphate poisoning, and nerve agent toxicity, not opioid overdose.

Correct Answer: C

Rationale: The correct answer is C: Fever. When a client is taking clozapine, fever can indicate serious conditions such as infection or severe reactions, which need immediate medical attention. Constipation (choice A), blurred vision (choice B), and dry mouth (choice D) are common side effects of clozapine but are not as urgent as fever. Constipation can be managed with dietary changes or medications, blurred vision can improve over time, and dry mouth can be relieved with frequent sips of water.

Correct Answer: A

Rationale: A glomerular filtration rate of 14 mL/minute indicates severe kidney dysfunction, necessitating hemodialysis. The other options, BUN of 16 mg/dL, serum magnesium of 1.8 mg/dL, and serum phosphorus of 4.0 mg/dL, are within normal ranges and do not serve as indications for hemodialysis.

Correct Answer: C

Rationale: An INR of 2.5 indicates a therapeutic level for a patient on warfarin. The INR (International Normalized Ratio) is the most accurate way to monitor and adjust warfarin doses. An INR of 1.1 (Choice A) is below the therapeutic range, indicating a need for an increased dose. PT (Prothrombin Time) of 12 seconds (Choice B) is not specific for warfarin therapy monitoring. Platelet count (Choice D) is not directly related to monitoring warfarin therapy.