Which food on a client's tray could cause a drug-food interaction with warfarin (Coumadin)?

Question

Quizplus · Accepted Answer

Spinach salad contains high amounts of vitamin K, which can interfere with the effectiveness of warfarin. Consuming large amounts of vitamin K can decrease the effectiveness of warfarin and increase the risk of blood clots. Therefore, it is important for clients taking warfarin to maintain a consistent intake of vitamin K and avoid sudden changes in their diet. The other choices (banana, toasted cheese sandwich, and iced tea) do not have significant amounts of vitamin K that can interact with warfarin.

Which Food on a Client's Tray Could Cause a Drug-Food