Review Question - QID 210830

A 47-year-old man was brought in by his wife for progressively worsening memory and bizarre behavior over the past 2 months. The wife reports that he has been sleeping 15 hours a day, but is still complaining of fatigue. He frequently forgets important events such as his son’s graduation and left the stove running 2 days ago. During the encounter, the patient reports that “it is no longer worth living.” Past medical history is significant for a corneal transplant 7 years ago. Physical examination reveals depressed mood, healed surgical scar on the left neck, and sustained jerking of the left foot. Which of the following could have prevented this patient’s condition?