Q. A 58-year-old man comes to the clinic for routine evaluation. He is feeling well. He has a 10-year history of diabetes mellitus type-2, which is managed with metformin. He has no significant tobacco or alcohol history. His blood pressure today is 156/85 mm Hg. Otherwise, his vital signs are normal. Urinalysis results are shown in the table below. Which of the following medications would you consider adding in order to protect his kidneys from further damage?