The nurse is caring for a patient with chronic heart failure and atrial fibrillation that takes digoxin and a thiazide diuretic. Which statement made by the patient indicates that the patient is experiencing a complication related to the medication?

A. "My ankles are still slightly swollen."
B. "I have to urinate a lot after I take those pills!"
C. "I'm not really hungry for lunch. I feel so nauseated and tired."
D. "I check my heart rate regularly. It is usually 80-90 beats per minute."