Q. A 45-year-old male presents to the emergency department with complaints of headache, dizziness, and a notable bluish discoloration of his skin and mucous membranes. His past medical history is significant for chronic kidney disease stage III. He recently started a new medication for his urinary tract infection. His vitals show a normal blood pressure, slightly increased heart rate, and an oxygen saturation of 88% on room air. The initial blood tests show a methemoglobin level of 30%. Despite the administration of methylene blue, the patient shows only modest improvement. What additional treatment option could be considered for this patient?