What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Eating before the test.
- Drinking caffeinated beverages or alcohol right before the test.
- Taking some medicines. Examples of medicines that can affect results include medicines that reduce stomach acid (such as Pepcid, Prilosec, or Zantac) and medicines or supplements that contain calcium (such as Tums or a daily vitamin). Make sure your doctor knows about all the medicines, herbs, and supplements you take.
- Having had stomach ulcer surgery or a small bowel resection. Increased gastrin levels also occur in medical conditions such as kidney failure, Reference rheumatoid arthritis Opens New Window, and Reference cirrhosis Opens New Window.
|By:||Reference Healthwise Staff||Last Revised: Reference March 7, 2012|
|Medical Review:||Reference Adam Husney, MD - Family Medicine
Reference Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology