Q. A 35-year-old female presents to the outpatient clinic complaining of fatigue, weight gain, and puffiness in her face and extremities for the past two weeks. In addition, she reports declined urine output and dark-colored urine. On examination, she appears pale and has bilateral peripheral edema. Her blood pressure is 152/100 mm Hg. Laboratory investigations show a serum creatinine of 2.5 mg/dL, and urine dipstick reveals 3+ proteinuria and 2+ hematuria. ANA is negative. A renal biopsy confirms the diagnosis of diffuse proliferative glomerulonephritis. What is the appropriate initial management for this patient?