A client on warfarin has therapeutic PT/INR levels, what should the nurse monitor regarding diet?

When a client is on warfarin, it is crucial to monitor their vitamin K intake because warfarin works by inhibiting the vitamin K-dependent clotting factors in the liver. Maintaining a consistent level of vitamin K in the diet helps to ensure stable anticoagulation and optimal therapeutic effect from the medication. Sudden changes in vitamin K intake can lead to fluctuations in INR levels, which may increase the risk of bleeding or thromboembolic events.

Consistent consumption of vitamin K, rather than avoiding it altogether or consuming it in variable amounts, is vital. Foods rich in vitamin K include leafy greens like spinach, kale, and broccoli, among others. By keeping vitamin K intake steady, the effectiveness of warfarin can be better managed, allowing for stable and therapeutic INR levels.

In contrast, while increased fiber intake, high-protein foods, and low-fat dairy products can be important aspects of a balanced diet for overall health, they do not specifically interact with the efficacy of warfarin the way that vitamin K does. Thus, monitoring vitamin K intake in clients on warfarin is essential for ensuring safe and effective anticoagulation therapy.