Road and parking lot construction in Madison, Wis. may result in travel delays and route changes to UW Health clinic and hospital locations. Please plan accordingly.Read more
This handout will tell you about the urea breath test. If you have any questions, ask your nurse or doctor before going to the lab. You must follow these instructions to get the best test results.
Reasons for the Test
The urea breath test will help your doctor decide if you have gastritis (irritation in the lining of the stomach) or an ulcer (sore). The ulcer is caused by bacteria called H. pylori. This test may also be used to follow up on your treatment plan.
Patients with PKU: If you have PKU, please contact your doctor. This test cannot be done on persons with PKU.
Getting Ready for the Test
Diet: Do not eat for one hour before your test.
Smoking: Do not smoke for at least one hour before your test and do not smoke during your test.
Medicines to avoid: Certain medicines interfere with this test. Avoid these for two weeks before this test. Contact your doctor if you have taken any of the medicines listed below during the two weeks before you test.
Bismuth such as
Proton pump inhibitors: These sometimes can cause false negative results. If you have a negative result, your doctor may ask you to stop these medicines for two weeks and repeat the test. These include:
Prilosec®, Prevacid®, Nexium®, Protonix®, Aciphex®, and Zegerid®.
H2 blockers: These may cause false negative results. If you are taking these medicines, a positive test is positive. If you have a negative result, your doctor may ask you to stop these medicines for two weeks and repeat the test. H2 blockers include:
Axid®, and others not listed.
Approved medicines: You may use any of the medicines below, before the test:
Common antacids such as:
Milk of Magnesia®,
Alternagel®, and others.
How the Test is Performed
The lab staff will collect a breath sample by having you to blow into a small bag.
Then a substance called urea will be dissolved in water by the lab staff. You will be asked to drink this water within 2 minutes.
Fifteen minutes later, you will give another breath sample by blowing into a second bag.
Both bags will be sent to the lab to be tested.
To find out if the treatment has worked, you must wait at least 4 weeks after ending treatment to avoid false negative results.
Who to Call
If you have questions about this test, please call the lab at (608)-263-6033 between 8:00 am and 4:30 pm, Monday through Friday.