The nurse recognizes that which food on a client's tray could cause a drug–food interaction with warfarin (Coumadin)?
1. Banana
2. Toasted cheese sandwich
3. Iced tea
4. Spinach salad
Correct Answer: 4
Rationale 1: A banana will not cause a food–drug interaction with warfarin (Coumadin).
Rationale 2: Toasted cheese will not cause a food–drug interaction with warfarin (Coumadin).
Rationale 3: Iced tea will not cause a food–drug interaction with warfarin (Coumadin).
Rationale 4: The vitamin K in the spinach can interfere with the action of warfarin (Coumadin) and prolong bleeding time.
Global Rationale: The vitamin K in the spinach can interfere with the action of warfarin (Coumadin) and prolong bleeding time. A banana will not cause a food–drug interaction with warfarin (Coumadin). Toasted cheese will not cause a food–drug interaction with warfarin (Coumadin). Iced tea will not cause a food–drug interaction with warfarin (Coumadin).
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