A patient diagnosed with atrial fibrillation is prescribed warfarin. Which of the following can interact with the effects of warfarin?
Explanation
• Dark leafy green vegetables are high in vitamin K and will reduce the effects of warfarin. However, the patient should maintain a consistent intake of vitamin K to prevent increased or decreased effects of warfarin due to changes in diet (vitamin K intake).
• Ferrous sulfate (iron) does not interact with warfarin.
• Furosemide does not interact with warfarin.
• Carrots are high in vitamin A, which does not have an effect on warfarin.