How do I prepare for the test?
- Tell your doctor if there is any chance you might be pregnant.
If you have diabetes and take insulin, discuss this with your
doctor before the test.
You will be given very specific instructions to ensure that your
colon is completely empty before the test. You may be told to
eat only a light breakfast and a liquid lunch and dinner (such
as broth, fruit juice, or plain gelatin) on the day before the
test. You may also be instructed to drink a large amount of clear
liquid between meals and to avoid dairy products. You will need
to take a laxative, a medicine that stimulates your intestine
to move things through more quickly, so that you have a bowel
movement to empty the colon. It is a good idea to stay at home
or at least near a bathroom for a few hours after taking the
laxative. On the day of the test, do not eat any breakfast.