病人獲開立華法林（Warfarin）。為確保用藥安全，護理師應提供哪些飲食指導？（選所有適合的）
A client is prescribed Warfarin. Which dietary instructions should the nurse provide to ensure medication safety? (Select all that apply.)
- AMaintain a consistent intake of green leafy vegetables✓ 正解保持綠色葉菜類攝取量一致
- BAvoid excessive consumption of cranberry juice✓ 正解避免過量飲用蔓越莓汁
- CIncrease vitamin K intake to reverse anticoagulant effects增加維生素 K 攝取以逆轉抗凝血效果
- DLimit alcohol consumption✓ 正解限制酒精攝取
- EAvoid large changes in dietary habits✓ 正解避免飲食習慣大幅改變
Warfarin 是一種維生素 K 拮抗劑，其藥效會受飲食中維生素 K 攝取量的直接影響。為了穩定 INR 值，病人必須保持飲食中維生素 K 的攝取量一致，避免攝取量驟增或驟減。此外，蔓越莓汁可能透過影響細胞色素 P450 酶系統而增強 Warfarin 的效力，需避免大量飲用。酒精會影響肝臟代謝，亦需限制。此類指導旨在預防出血或栓塞風險。
Patients taking warfarin must maintain a consistent intake of vitamin K-rich foods to prevent unpredictable fluctuations in INR levels. They should avoid excessive cranberry juice, which may enhance the anticoagulant effect, and limit alcohol, as it interferes with hepatic metabolism of the drug. Stability in dietary habits is essential for safe warfarin therapy.
台灣與美國在 Warfarin 教育上一致，強調維生素 K 穩定攝取。但美國臨床中對於蔓越莓汁（Cranberry juice）的交互作用警告較為普遍，台灣臨床教育則更側重於提醒病人避免中草藥（如當歸、丹參）的交互作用。