Upper Endoscopy (EGD) Preparation

Overview

An upper endoscopy (also called EGD or gastroscopy) is a 10–15 minute procedure where a thin, flexible camera is passed through the mouth to examine the esophagus, stomach, and the first part of the small intestine (duodenum). It's used to investigate heartburn, swallowing problems, abdominal pain, anemia, or suspected ulcers — and it can take biopsies to test for H. pylori, celiac disease, or pre-cancerous changes (Barrett's esophagus). You'll be sedated through an IV and feel almost nothing.

Common Reasons for an EGD

• Persistent heartburn or reflux not responding to medication
• Difficult or painful swallowing
• Unexplained upper abdominal pain or nausea
• Iron-deficiency anemia or upper-GI bleeding
• Suspected H. pylori infection or stomach ulcer
• Investigation for celiac disease
• Surveillance for Barrett's esophagus

Before Your Procedure

• Fast for at least 8 hours before your appointment — no food, milk, or juice
• You may sip a small amount of water until 4 hours before
• Take essential morning medications with a small sip of water unless told otherwise (skip diabetes meds the morning of)
• Discuss blood thinners (aspirin, warfarin, clopidogrel, NOACs) with your doctor at least a week before
• Tell us about allergies, heart or lung problems, and any prior reactions to sedation
• Arrange an adult driver — you cannot drive for 24 hours after sedation

During & After

• You'll lie on your left side; a soft mouth guard protects your teeth
• Sedation works within seconds — most patients don't remember the procedure
• A mild sore throat for a few hours is normal
• Wait for the sedation to wear off (60–90 minutes) before going home
• Resume eating with light foods 30–60 minutes after, once swallowing feels normal
• Avoid alcohol, driving, and important decisions for 24 hours
• Visual results are explained before you leave; biopsy or H. pylori results follow in 5–10 days

When to Call Us After

Call us if you have severe chest or abdominal pain, fever above 38°C, persistent vomiting (especially with blood), shortness of breath, or trouble swallowing that is worse than before. A mild sore throat and bloating are normal and resolve within 24 hours.