- Patients who are receiving intravenous iodine contrast agents at the time of visit 1(Screening) or planned during the clinical trial period (eg, intravenous urography, venous cholangiography, angiography, computed tomography using contrast media, etc.) ). For patients who have received this test, they can re-evaluate the renal function 48 hours after the test and only participate in clinical trials after they have been found to be normal.