A client who has been receiving diuretic therapy is admitted to the emergency department with a serum potassium level of 3. 0 mEq/L. The nurse should alert the health care provider immediately that the patient is on which medication?
A. Oral digoxin 0. 25 mg daily
B. Oral digoxin 0. 26 mg daily
C. Ibuprofen 400 mg every 6 hours
D. Metoprolol 12. 5 mg orally daily