— 藥理與非經腸給藥 · MEDIUM · MCQ —
病人被開立華法林(Warfarin)。下列哪項飲食衛教最重要?
A client is prescribed warfarin. Which dietary instruction is most important?
- ALimit protein intake to prevent drug interactions限制蛋白質攝取以防止藥物交互作用
- BAvoid all green leafy vegetables避免所有綠色葉菜
- CMaintain a consistent intake of vitamin K-rich foods✓ 正解維持富含維生素K食物的穩定攝取
- DIncrease intake of foods rich in vitamin C增加富含維生素C食物的攝取
— Explanation · 中文詳解 —
華法林(Warfarin)作為維生素 K 拮抗劑,其藥效與攝取的維生素 K 水平直接相關。臨床治療目標是讓國際標準化比值(INR)維持在目標治療範圍(Therapeutic Range)內。若病人飲食中維生素 K 攝取量波動過大,會導致藥物代謝動力學改變,進而引起 INR 劇烈波動。護理重點在於要求病人攝取「穩定」的維生素 K 含量,而非完全避免,以確保藥效可預測且穩定。
Warfarin acts as a vitamin K antagonist, so maintaining a consistent daily intake of vitamin K-rich foods is essential to prevent fluctuations in INR levels. Eliminating these foods is unnecessary and detrimental to nutrition; instead, consistency ensures predictable drug metabolism and therapeutic efficacy without causing dangerous instability in anticoagulation.
✦ 台美臨床差異
台灣臨床常見衛教病人「少吃綠色蔬菜」,但在美國,藥師與護理師更強調「攝取穩定(Consistency)」,因為完全禁食綠色蔬菜在實務上極難達成且會造成營養失調。赴美執業時,務必以「穩定」作為衛教核心用語。