A nurse is completing a medical interview with a client who has elevated cholesterol levels and takes warfarin. The nurse should recognize that which of the following actions by the client can potentiate the effects of warfarin?

A. The client drinks a glass of grapefruit juice every day: Grapefruit juice can interact with several medications, including statins, but it does not significantly potentiate the effects of warfarin. It affects enzymes responsible for drug metabolism, but it is not a primary concern for warfarin interactions. B. The client sprinkles flax seeds on food 1 hr before taking the anticoagulant: Flax seeds are a source of fiber and omega-3 fatty acids, flax seeds alone are not a significant concern with warfarin. C. The client follows a low-fat diet to reduce cholesterol: A low-fat diet does not potentiate the effects of warfarin. Maintaining a balanced diet with consistent vitamin K intake is important for clients on warfarin to avoid fluctuations in the medication’s effectiveness. D. The client uses garlic to lower cholesterol levels: Garlic can enhance the anticoagulant effects of warfarin by inhibiting platelet aggregation. This increases the risk of bleeding, making garlic a significant concern for clients on warfarin therapy.