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At a Glance
Why Get Tested?
To determine whether you are producing too much gastrin; to help diagnose Zollinger-Ellison syndrome and gastrin-producing tumors (gastrinomas) or G-cell hyperplasia; to monitor for recurrence of a gastrinoma
When to Get Tested?
A blood sample drawn from a vein in your arm
Test Preparation Needed?
You should fast for 12 hours, including avoiding coffee and caffeine-containing drinks, and avoid alcohol for 24 hours prior to the test. Your healthcare practitioner may also ask you to refrain from taking certain stomach medications for several days prior to the test. Medications that can increase gastrin levels include antacids, H2-blocking agents (such as cimetidine), and proton pump inhibitors (such as omeprazole).