Will I need to do anything to prepare for the test?
Your provider may ask you to drink extra fluids on the day before the test. On the day of the test, you will probably be asked to not eat or drink anything, except for clear fluids. These include water, clear broth, tea, and black coffee.
Talk to your provider about any medicines you are taking. Certain medicines, especially aspirin and blood thinners, should not be taken before your test. Your provider will let you know how long you need to avoid these medicines. It may be as long as 72 hours before the test.
