Q. A 44-year-old man is brought to the emergency department after collapsing at his office. The patient has diabetes and hypertension. He is complaining of blurry vision, fatigue, and dizziness. His coworkers state he was confused and agitated before collapsing. He denies chest pain, palpitations, tremor, fever, or chills. He uses glyburide for his diabetes but cannot remember the name of his hypertension medication. His A1c is 8.5%. Which of the following agents is most likely responsible for this patient’s condition?