An intravenous pyelogram (IVP) is an X-ray exam of your urinary tract (kidneys, ureters, and bladder). This test can help find stones or other problems with your urinary tract. IVP is not used very often. CT and ultrasound are more often used.

• Follow all instructions on what to eat and drink before the test.
• If instructed, take a laxative the night before your IVP.

Before you have an IVP, make sure your doctor knows if:

• You have allergies, especially to iodinated intravenous (I.V.) contrast. This is a substance that improves X-ray images. You can still have an IVP if you are allergic to the contrast substance, but you will need to take a medicine beforehand.
• You have ever had kidney or bladder problems.
• You take diabetes medicine.
• You have had surgeries or a recent illness.
• You are or may be pregnant.

Risks linked to IVP include:

• Radiation exposure.
• Reaction to the contrast substance. The reaction can be mild (itching, hives, nausea) or severe (difficulty breathing, swelling of the throat, drop in blood pressure).
• Kidney damage that gets worse.

• You will likely have the test at a hospital or outpatient testing center.
• Your health care provider will give you an I.V. (intravenous) injection of contrast into a vein in your hand or arm.
• You'll be asked to move from side to side and then hold still as X-rays are taken.
• Your provider may apply pressure to your belly to help get the best images.
• You may be asked to empty your bladder before the final X-ray.

Your doctor will discuss the test results with you during a follow-up visit or over the phone.