USMLE Step 1 - Question 22

A 60 year old male with a history of congestive heart failure and atrial fibrillation states his vision has been mostly yellow recently. He has noted lack of appetite and weight loss. Laboratory studies reveal and elevated potassium level. Which of the following is the likely causing his symptoms?

A. Nitroglycerine

B. Digoxin

C. Amiodarone

D. Spironolactone

E. Sildenafil