Description
Why It’s Done
Doctors may recommend a Gastrin test to:
• Diagnose Zollinger-Ellison Syndrome (ZES): A rare condition caused by gastrin-producing tumors (gastrinomas), which lead to high acid levels and severe ulcers.
• Evaluate Chronic Gastric Symptoms: Such as recurrent ulcers, abdominal pain, or acid reflux.
• Monitor Pernicious Anemia or Atrophic Gastritis: These conditions can lead to low stomach acid and a compensatory increase in gastrin levels.
• Check for G-cell Hyperplasia: Overgrowth of cells that produce gastrin.
Preparation
Proper preparation is important to get accurate results:
• Fasting Required: Do not eat or drink anything except water for 8–12 hours before the test.
• Avoid Certain Medications: Some medications can affect gastrin levels, including:
o Antacids
o H2 blockers (like ranitidine)
o Proton pump inhibitors (like omeprazole or pantoprazole)
Your doctor will tell you if you need to stop these temporarily before the test.
• Avoid Alcohol and Caffeine: For at least 24 hours before the test.
• Tell Your Doctor: Inform your doctor about any medications, supplements, or medical conditions you have.
