A 72-year-old man in hospital develops an acute rise in serum creatinine from 80 to 130 µmol/L over 48 hours. His urine output is reduced and he is taking an ACE inhibitor and NSAID. What is the most appropriate immediate management step?AStop the ACE inhibitor and NSAID and assess volume statusBStart high-dose IV loop diureticsCCommence long-term haemodialysis immediatelyDNo action is required as this is normal in elderly patientsEStart high-dose steroids for presumed interstitial nephritisCheck my answer