This document discusses a 63-year-old man with type 2 diabetes and chronic kidney disease who presents with increased fatigue and hypoglycemia. He has a history of diabetes for 11 years and hypertension for 6.5 years. Laboratory tests show uncontrolled diabetes with early declining renal function. His treatment is modified by substituting gliclazide for glimepiride and continuing linagliptin based on his estimated glomerular filtration rate. Studies show linagliptin improves glycemic control in patients with kidney disease without worsening renal function or increasing hypoglycemia risk. After treatment changes, his blood sugar, albuminuria, and kidney function show improvement at 3 and 6 month follow ups.