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 had my INR checked three weeks ago.": Regular INR monitoring is essential for clients on warfarin to ensure therapeutic anticoagulation. Reporting recent INR testing demonstrates adherence to monitoring guidelines and does not indicate a need for further teaching. B. "I take this medication at the same time each day.": Consistent timing helps maintain stable anticoagulation levels. This statement reflects proper adherence to the prescribed regimen and indicates understanding of medication management. C. "I have started taking ginger root to treat my joint stiffness.": Ginger can increase the risk of bleeding in clients taking warfarin due to its antiplatelet effects. There is need for teaching about potential drug–herb interactions and safety precautions while on anticoagulant therapy. D. "I eat a green salad every night with dinner.": Consuming green vegetables is acceptable as long as intake is consistent because they contain vitamin K, which can affect warfarin levels. This statement shows awareness of diet considerations.