Upper Gastrointestinal Diseases: Main Disorders and Initial Treatment
For upper GI diseases, start with GERD and functional dyspepsia as your primary diagnostic considerations, test for H. pylori in dyspeptic patients, and initiate proton pump inhibitors as first-line therapy for most presentations.
Key Upper GI Disorders
The main upper gastrointestinal disorders you'll encounter are:
1. Gastroesophageal Reflux Disease (GERD)
GERD is the most common upper GI disorder affecting patients of all ages 1. PPIs remain the medical treatment of choice for GERD 2. Start with the lowest effective dose that controls symptoms, as there is no clear dose-response relationship 3. Lifestyle modifications should accompany pharmacotherapy, though PPIs are the cornerstone of treatment.
2. Functional Dyspepsia (FD)
This presents with epigastric pain, early satiety, and bloating without structural abnormalities. The British Society of Gastroenterology provides clear algorithmic guidance 3:
Initial Management Algorithm:
Age <55 years with no alarm features: Perform H. pylori "test and treat" strategy
Age ≥55 years with treatment-resistant dyspepsia, raised platelet count, nausea/vomiting: Consider non-urgent endoscopy 3
Age ≥60 years with abdominal pain AND weight loss: Urgent abdominal CT to exclude pancreatic cancer 3
First-line pharmacologic options for FD:
- PPIs (strong recommendation, high-quality evidence) 3
- H2-receptor antagonists (weak recommendation, lower efficacy than PPIs) 3
- Prokinetics where available (efficacy varies by agent) 3
- Advise regular aerobic exercise for all patients 3
Second-line treatment when first-line fails:
- Tricyclic antidepressants as gut-brain neuromodulators (strong recommendation, moderate evidence) 3
- Start amitriptyline 10 mg once daily, titrate slowly to maximum 30-50 mg daily 3
- Provide careful explanation that this is for visceral pain modulation, not depression
3. Gastroparesis
Characterized by nausea, vomiting, and delayed gastric emptying without mechanical obstruction 4.
Diagnostic requirement: 4-hour gastric emptying test (not 2-hour testing) 4
Initial pharmacologic treatment:
- Metoclopramide (conditional recommendation, only FDA-approved treatment) 4
- Erythromycin (conditional recommendation) 4
Avoid as first-line: domperidone, prucalopride, aprepitant, nortriptyline, buspirone, cannabidiol 4
Reserve for refractory cases only: gastric per-oral endoscopic pyloromyotomy (G-POEM) or gastric electrical stimulation 4
4. Upper GI Bleeding (Non-Variceal)
Presents with hematemesis, coffee-ground emesis, melena, or hematochezia 5.
Immediate management:
- Resuscitate with crystalloids and blood products (restrictive transfusion strategy: hemoglobin <7 g/dL) 6
- Start intravenous PPIs immediately in suspected peptic ulcer bleeding 6
- Consider prokinetic agents 30-60 minutes before endoscopy 5
- Perform endoscopy within 24 hours after stabilization 5, 6
Common Pitfalls to Avoid
Don't skip H. pylori testing in dyspepsia: This is a highly effective, evidence-based intervention that many clinicians overlook 3
Don't use 2-hour gastric emptying tests: The 4-hour test is the diagnostic standard for gastroparesis 4
Don't use epinephrine injection alone for GI bleeding: Always combine with thermal or mechanical methods 5
Don't routinely perform gastric emptying or pH monitoring in typical FD: These tests add little diagnostic value 3
Don't prescribe TCAs without proper counseling: Patients need clear explanation that these are for visceral pain modulation, not psychiatric treatment 3
When to Refer to Gastroenterology
Refer when there is:
- Diagnostic uncertainty
- Severe or refractory symptoms despite first-line treatment
- Patient request for specialist opinion 3
Ideally, manage FD patients in specialist clinics with access to dietetic support, efficacious drugs, and gut-brain behavioral therapies 3.