一位65歲男性因難治型右心衰竭引發嚴重使人衰弱的周邊水腫，在接受治療後正準備出院。在檢閱居家處方時，他注意到醫師開立了兩種截然不同的利尿劑藥丸：強效的 Furosemide (Lasix) 以及 Spironolactone (Aldactone)。他緊張地質問護理師：「讓我同時吞下兩種不同的排水藥丸，難道不是一場災難性的處方錯誤嗎？我難道不會迅速把所有的血量尿光致死嗎？」哪項回應為這個特定的組合提供了最精確的藥理學推理？
A 65-year-old male is preparing for discharge after being treated for severe, debilitating peripheral edema secondary to intractable right-sided heart failure. Reviewing his home prescriptions, he notices his physician ordered two distinct diuretic pills: profound Furosemide (Lasix) and Spironolactone (Aldactone). He nervously questions the nurse, "Isn't it a catastrophic prescription error to force me to take two different water pills at the exact same time? Wouldn't I just rapidly urinate all my blood volume out to death?" Which response provides the most accurate pharmacological reasoning for this specific combination?
- A“Spironolactone severely constricts your renal arteries to prevent the Furosemide from overworking your kidneys into total dialysis-level failure.”「螺內醋胺會嚴重收縮您的腎動脈，以防止呋塞米讓您的腎臟過度工作而導致總透析等級衰竭。」
- B“This is indeed a prescription overlap error; utilizing two identical potassium-wasting loop diuretics simultaneously universally leads to immediate cardiac arrest.”「這確實是處方重疊錯誤；同時使用兩種相同的排鉀型環狀利尿劑，普遍會立即導致心臟停搏。」
- C“Furosemide acts purely to reduce your escalating blood pressure, whereas Spironolactone solely pulls the interstitial fluid out of your heavily bloated legs without directly affecting urine volume.”「呋塞米純粹用於降低您持續上升的血壓，而螺內醋胺僅從您嚴重腫脹的小腿中提取間質液，而不直接影響尿量。」
- D“Furosemide ruthlessly drains potassium out of your body, while Spironolactone actively saves and spares your potassium. Combining them brilliantly eliminates the massive fluid edema while keeping your highly sensitive heart rhythm electrically stable by balancing potassium limits.”✓ 正解「呋塞米殘酷地將鉀離子從您體內排出，而螺內醋胺則積極保存並保留您的鉀離子。將它們結合使用巧妙地消除了大量液體水腫，同時通過平衡鉀離子限度來保持您高度敏感的心律電氣穩定。」
本題測驗心血管用藥中，利尿劑分類的協同作用。Furosemide (Lasix，環狀利尿劑) 是一種強效的「排鉀型（Potassium-wasting）」利尿劑。它能有效消除嚴重水腫，但同時會將鉀離子排出體外，極易引發致命的低血鉀（Hypokalemia）。而 Spironolactone (Aldactone) 是一種「保鉀型（Potassium-sparing）」利尿劑，透過拮抗醛固酮來排水，但會保留鉀離子（可能造成高血鉀）。在嚴重水腫且難治性心衰竭的病患中，醫師同時開立這兩種藥物並非錯誤，而是合理的用藥策略：能獲得加強的水分排出效益，同時藉由「排鉀對抗保鉀」的機制互相抵銷彼此對鉀離子的影響，藉此維持電解質平衡並保護心臟免於心律不整（選項 D 為正解）。選項 A 與 C 對兩種利尿劑的作用機理描述錯誤，無解剖與生理學依據。選項 B 錯誤，因為這兩者並非皆是排鉀利尿劑，一保一排。
Furosemide is a loop diuretic that promotes potassium excretion, which can lead to dangerous hypokalemia, while spironolactone is a potassium-sparing diuretic that retains potassium. Prescribing both creates a synergistic effect that effectively manages severe edema in heart failure while maintaining electrolyte balance and protecting against cardiac arrhythmias. This combination is a standard therapeutic strategy rather than an error.
「Furosemide排鉀 vs Spironolactone保鉀」是藥理學國考最常出的送分對比題。這種「互補式雞尾酒處方」的知識，是護理師避免在病房亂填異常報告（以為醫師開出重複藥物）的必備常識。