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

A) Incorrect. The client should eat a consistent amount of foods that are high in vitamin K, such as leafy greens, broccoli, and cabbage. Vitamin K can interfere with the anticoagulant effect of warfarin and increase the risk of clotting.

B) Correct. The client should use an electric razor for shaving to prevent cuts and bleeding.

C) Correct. The client should check their blood pressure regularly to monitor for hypertension, which can increase the risk of bleeding complications.

D) Correct. The client should report any signs of bleeding or bruising to their provider, as they may indicate a high INR level or a bleeding disorder.

A) Incorrect. Metformin does not cause hypoglycemia, as it does not stimulate insulin secretion. It lowers blood glucose levels by decreasing hepatic glucose production and increasing insulin sensitivity.

B) Incorrect. Metformin absorption is not affected by food intake. The medication can be taken with or without food, but taking it with meals can help reduce gastrointestinal side effects.

C) Correct. Metformin can cause gastrointestinal upset, such as nausea, diarrhea, and abdominal pain. Taking it with meals can help minimize these effects by slowing down the transit of the medication through the digestive tract.

D) Incorrect. Metformin effectiveness is not influenced by food intake. The medication works by improving glucose metabolism and insulin action.