At a Glance
Why Get Tested?
To detect an overproduction of gastrin, to help diagnose Zollinger-Ellison syndrome and G-cell hyperplasia, and to monitor for recurrence of a gastrin-producing tumor (gastrinoma)
When to Get Tested?
A blood sample drawn from a vein in your arm
Test Preparation Needed?
You should fast for 12 hours and avoid alcohol for 24 hours prior to the test. Your doctor may also ask you to refrain from taking certain stomach medications for several days prior to the test.