病人開始服用 Warfarin，出院時病人說了哪些話表示需要進一步衛教？（選所有適合的）
A nurse is preparing a client for discharge after starting warfarin therapy. Which statements by the client indicate a need for further teaching? (Select all that apply.)
- AI will increase my intake of green leafy vegetables to ensure I get enough vitamins.✓ 正解我會增加綠色葉菜類的攝取量，以確保獲得足夠的維生素。
- BI will use a soft-bristled toothbrush to prevent bleeding gums.我會使用軟毛牙刷來預防牙齦出血。
- CI will take an aspirin if I get a headache to relieve the pain.✓ 正解如果我頭痛，我會服用阿斯匹靈來緩解疼痛。
- DI will contact my healthcare provider if I notice dark, tarry stools.如果我注意到黑色柏油樣糞便，我會聯繫醫療保健提供者。
- EI will avoid using herbal supplements like St. John's wort without consulting my doctor.在未諮詢醫師的情況下，我會避免使用聖約翰草等草藥補充品。
Warfarin 作用機轉為維生素 K 拮抗劑。攝取過多綠色蔬菜（富含 Vit K）會減弱藥效；服用阿斯匹靈（Aspirin）會增加出血風險，兩者皆為病人錯誤認知。其他選項如使用軟毛牙刷、注意潛血症狀以及諮詢草藥使用皆為正確的抗凝血劑自我照護知識。
Warfarin acts as a vitamin K antagonist, so increasing intake of green leafy vegetables can interfere with its therapeutic effect by counteracting the medication. Additionally, taking aspirin is dangerous because it inhibits platelet aggregation and significantly increases the risk of bleeding when combined with anticoagulants. Clients should maintain consistent vitamin K intake rather than increasing it, and avoid NSAIDs like aspirin unless specifically prescribed.
美台對 Warfarin 的衛教核心一致，台灣常加強強調藥物與中藥交互作用的風險諮詢。