How you prepare

Before a CT urogram, tell your health care team 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
• Are taking any medications, such as metformin (Fortamet, Glucophage, others), nonsteroidal anti-inflammatory drugs (NSAIDs), anti-rejection drugs or antibiotics
• Have had a recent illness
• Have a medical condition, such as heart disease, asthma, diabetes, kidney disease or a prior organ transplantation

You may be asked to drink water before a CT urogram and not to urinate until after the procedure. This expands your bladder. But, depending on your condition, guidelines about what to eat and drink before your CT urogram may vary.