A nurse is teaching a client who takes warfarin daily. Which of the following statements by the client indicates a need for further teaching?

A. "I eat a green salad every night with dinner.": While it's important for clients on warfarin to maintain a consistent intake of vitamin K (which is found in leafy greens), eating a green salad every night is not inherently harmful. B. "I take this medication at the same time each day.": This statement is correct and indicates proper adherence to warfarin therapy. Taking warfarin at the same time each day helps maintain stable blood levels. C. "I had my INR checked three weeks ago.": While the frequency of INR checks may vary depending on the client’s individual needs, regular monitoring is crucial. The client should be following up with the healthcare provider on a schedule based on the provider's recommendations. D. "I have started taking ginger root to treat my joint stiffness.": Ginger root can have anticoagulant effects and may interact with warfarin, increasing the risk of bleeding. Clients on warfarin should be cautioned about using herbal supplements like ginger, as they can interfere with the medication’s effectiveness.