The nurse is assessing a 64-year-old female patient. The patient states that she is able to reduce the risk of urinary tract infections (UTIs) by drinking a quart of cranberry juice a day. Which health condition, if present in this patient, contraindicates the use of cranberry juice?
Correct Answer: C
Rationale: Cranberry juice has the potential to interact with warfarin, a common blood thinner prescribed for conditions such as atrial fibrillation. Cranberry juice contains components that can inhibit the metabolism of warfarin in the body, leading to an increased risk of bleeding. Therefore, patients taking warfarin should avoid or limit their intake of cranberry juice to prevent potential negative interactions. In this case, the patient's use of warfarin to manage atrial fibrillation contraindicates the consumption of cranberry juice in large quantities. It is essential to consult a healthcare provider before making any changes to the diet, especially when taking medications that may interact with certain foods or beverages.