Question: A 77-year-old woman is accompanied by her husband for evaluation. She is currently being treated with metoprolol (Lopressor®) for hypertension and verapamil (Calan® SR) for atrial fibrillation. He reports that his wife is becoming increasingly forgetful over the past year, failing to note important family events such as birthdays, and sometimes becomes confused with driving directions to familiar locations. She has no previous psychiatric history. The most likely diagnosis is: Need Assignment Help?