The prospective study was performed to reassess the necessity of water deprivation before excretory urography (IVP) with non-ionic contrast medium. 35 adults were deprived of water before IVP and divided into two groups. First group was received 250 ml 5% glucose solution and lopamidol-300 (1 ml/kg, maximum dose; 50 ml). Second group received contrast medium only. Image quality of IVP of the two groups were compared. In the first group the visualization of ureter and bladder were better than the second group. There was no significant difference in the caliceal and pelvic visualization between the two groups. Water deprivation was suggested to be unnecessary in IVP with non-ionic contrast medium.