How you prepare

Before an intravenous pyelogram, tell your doctor if you:

• Have any allergies, particularly to iodine
• Are pregnant or think you might be pregnant
• Have had a previous severe reaction to X-ray dyes

You may need to avoid eating and drinking for a certain amount of time before an intravenous pyelogram. Your doctor may also recommend that you take a laxative the evening before the exam.