Q. A 35-year-old man presents to the emergency department with severe right-sided flank pain that radiates to his groin. He has a history of kidney stones and describes the pain as similar to his previous episodes. On examination, his vital signs are stable, and he has tenderness to palpation in the right flank. A urine analysis reveals microscopic hematuria. A non-contrast computed tomography (CT) scan confirms the presence of a 4 mm stone in the right ureter. What is the best initial management for this patient's renal colic?