A 48-year-old man presents with sudden-onset severe colicky loin-to-groin pain and visible haematuria. He is restless but haemodynamically stable. What is the most appropriate initial management in the emergency department?AStart strong opioid analgesia and NSAIDs, arrange urgent non-contrast CT KUBBArrange elective intravenous urogram as an outpatientCReassure and discharge with paracetamol onlyDAdmit under surgery for immediate laparotomyEPrescribe antibiotics onlyCheck my answer