There are however some limitations to the CUBT that is important to acknowledge:
- All solids must be emptied from the gastrointestinal tract by following a clear liquid diet for 2 days before colonoscopy.
- CUBT can only be performed two months after the anti Helicobacter treatment. Tests performed earlier can be falsely negative.
- CUBT can also be falsely negative if you have taken any antibiotic during a month prior to the test.
- CUBT can also be falsely negative if you take any medications with omeprazol, esomeprazol, pantoprazol, lanzoprazol, rabeprazol or bismuth two weeks prior to the test. There are many medications containing these compounds currently on sale in Portugal please check with your doctor.