The Nurse Is Caring for a Client Who Has Been

The nurse is caring for a client who has been receiving diuretic therapy and is admitted to the emergency department with a serum potassium level of 3.1 mmol/L. Of the following medications that the client has been taking at home, which of the followingwouldbe of most concern to the nurse?

A) Oral digoxin 0.25 mg daily
B) Ibuprofen 400 mg every 6 hours
C) Metoprolol 12.5 mg orally daily
D) Lantus insulin 24 U subcutaneously every evening