A 51-year-old man comes to the emergency department with right-sided flank pain, vomiting and a history of kidney stones. There is no history of renal dysfunction. He has been taking ibuprofen 600 mg every 4 hours for the past 2 days. CT scan of the abdomen demonstrates a 6 mm obstructing stone in the right ureter. Serum creatinine is 290 µmol/L. Which of the following statements is FALSE?