A nurse is providing teaching to a client who has a new prescription for warfarin. Which of the following instructions should the nurse include in the teaching?

Rationale: A. "This medication can increase your risk for osteoporosis.": Long-term warfarin use may affect bone density slightly, but this is not the primary teaching point for safety and daily management. It is less immediately relevant than bleeding risk. B. "This medication can cause hearing loss.": Warfarin is not associated with ototoxicity or hearing loss; this statement does not reflect a known adverse effect of the medication. C. "Avoid drinking cranberry juice while taking this medication.": Cranberry products can interact with warfarin and increase the risk of bleeding by potentiating its anticoagulant effect. Clients should be advised to avoid or limit cranberry intake to maintain safe INR levels. D. "Increase your intake of foods high in vitamin K while taking this medication.": Consuming consistent amounts of vitamin K is important, but the client does not need to increase intake. Sudden increases can counteract warfarin’s effect; the emphasis is on maintaining a stable vitamin K intake.