Case Presentation: 70-year-old female with ILD and bullous pemphigoid (BP) on mycophenolate mofetil and prednisone initially presented to emergency room for hematuria and chills, where she was found to have elevated creatinine of 1.25 mg/dL (baseline creatinine 0.4 mg/dL) and prescribed a course of ciprofloxacin for hemorrhagic cystitis. She was admitted three days later due [...]