Cardiovascular Drugs USMLE Step 1 Practice Question

A 58-year-old woman with a 10-year history of hypertension and stage 3b chronic kidney disease secondary to diabetic nephropathy is started on lisinopril 10 mg daily. Her baseline creatinine was 2.8 mg/dL (eGFR 28 mL/min/1.73m²) and potassium was 4.2 mEq/L. She returns 2 weeks later reporting good tolerance with blood pressure 128/76 mmHg. Physical examination is unremarkable with no edema or jugular venous distension. Repeat laboratories show: Creatinine: 3.2 mg/dL Potassium: 5.8 mEq/L Bicarbonate: 22 mEq/L Urine output: maintained at baseline She denies dyspnea, chest pain, or decreased urine output. Which of the following is the most appropriate next action?