Gastrin

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Eating a high-protein food right before the test.
• Drinking caffeinated beverages or alcohol right before the test.
• Taking medicines or supplements that contain calcium.
• Taking medicines that control stomach acid, such as Pepcid, Zantac, or Losec,
• Taking anticholinergic medicines and some medicines used to treat depression (tricyclic antidepressants).
• Using medicines that contain atropine (such as Lomotil).
• Having abnormally low blood sugar (hypoglycemia).
• Having had stomach ulcer surgery or a small bowel resection. Increased gastrin levels also occur in medical conditions such as kidney failure, rheumatoid arthritis, and cirrhosis.

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Author:	Douglas Dana Sydney Youngerman-Cole, RN, BSN, RNC	Last Updated: June 27, 2006
Medical Review:	Martin Gabica, MD - Family Medicine Adam Husney, MD - Family Medicine Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology
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