📋 Key Information Summary
- Dyspepsia is defined as chronic or recurrent pain or discomfort centred in the upper abdomen, affecting up to 30% of Australians annually.
- Alarm features (dysphagia, progressive weight loss, persistent vomiting, GI bleeding, iron-deficiency anaemia, age ≥60 with new-onset symptoms) mandate urgent endoscopy (OGD) — do not trial empiric therapy.
- Functional (non-ulcer) dyspepsia accounts for ≥50% of cases after investigation and is diagnosed by Rome IV criteria when structural disease is excluded.
- Helicobacter pylori is present in ~20–30% of Australian adults; test-and-treat is recommended for patients <60 years without alarm features (carbon-13 urea breath test preferred).
- First-line H. pylori eradication: standard triple therapy (PPI + amoxicillin 1 g + clarithromycin 500 mg, all BD for 14 days) or biaclarithromycin quadruple therapy if clarithromycin resistance >15%.
- Empiric PPI trial (e.g., omeprazole 20 mg daily for 4–8 weeks) is first-line for uninvestigated dyspepsia without alarm features and negative H. pylori.
- GORD is a leading organic cause; trial a full-dose PPI for 8 weeks; refractory symptoms require OGD ± pH monitoring.
- Functional dyspepsia management: lifestyle measures, low-dose tricyclic antidepressant (amitriptyline 10–25 mg nocte), or prokinetic (domperidone) as second-line.
- Elderly patients (>65 years) have higher malignancy risk — lower threshold for OGD; also consider NSAID/aspirin-related gastropathy and polypharmacy.
- Children with dyspepsia should be evaluated with age-appropriate criteria; H. pylori test-and-treat in selected cases; most respond to lifestyle and dietary changes.
- Aboriginal and Torres Strait Islander peoples have higher H. pylori prevalence (up to 70–90% in remote communities), higher gastric cancer rates, and reduced access to endoscopy — maintain a low threshold for investigation and referral.
- Reassess and refer if symptoms persist beyond 4–8 weeks of appropriate therapy or recur — do not repeatedly re-prescribe PPIs without re-evaluation.
Introduction & Australian Epidemiology
Dyspepsia encompasses a spectrum of upper gastrointestinal symptoms — including epigastric pain, burning, early satiety, postprandial fullness, bloating, and nausea — that are chronic or recurrent in nature. It is one of the most common presentations in Australian general practice, accounting for an estimated 5–10% of all consultations.
In Australia, population-based studies report a point prevalence of uninvestigated dyspepsia of approximately 25–30% in adults. Only a minority of affected individuals seek medical attention. The economic burden is substantial, encompassing direct healthcare costs (investigations, medications, endoscopy) and indirect costs from lost productivity. The condition affects all age groups but peaks in the 30–60-year age bracket.
Dyspepsia is broadly classified into:
- Uninvestigated dyspepsia — symptoms present but no endoscopic evaluation performed.
- Investigated dyspepsia — endoscopy has been performed and a structural cause may or may not have been identified.
- Functional (non-ulcer) dyspepsia — meets Rome IV criteria and all organic causes excluded.
Common organic causes include gastro-oesophageal reflux disease (GORD), peptic ulcer disease (PUD), gastric or oesophageal malignancy, and drug-induced gastropathy. H. pylori infection, coeliac disease, and pancreaticobiliary disease should also be considered.
Dyspepsia Diagnostic Model
The diagnostic approach to dyspepsia in Australian primary care follows a structured algorithm endorsed by the RACGP and aligned with Therapeutic Guidelines (eTG) Gastrointestinal. The key decision points are the presence of alarm features, age, H. pylori status, and response to empirical therapy.
Discriminating Symptoms
| Symptom Pattern | Likely Diagnosis | Next Step |
|---|---|---|
| Epigastric burning relieved by food/antacids | Peptic ulcer disease or functional dyspepsia | H. pylori test; OGD if alarm features or ≥60 years |
| Retrosternal burning, worse lying down, acidic taste | GORD | Empiric PPI 8 weeks; OGD if refractory |
| Early satiety, postprandial fullness, bloating | Functional dyspepsia (PDS subtype) | Exclude organic disease; consider prokinetic |
| Colicky pain radiating to back, post-prandial nausea | Pancreaticobiliary disease | LFTs, lipase, abdominal ultrasound |
| Dysphagia + weight loss | Oesophageal/gastric malignancy | Urgent OGD — do not delay |
Role of Non-Invasive Testing Before Endoscopy
In patients <60 years without alarm features, a non-invasive H. pylori test (UBT or SAT) is recommended before initiating therapy. This test-and-treat strategy reduces unnecessary endoscopy by up to 60% and is cost-effective in the Australian healthcare setting. The MBS item for OGD (MBS 30473) is available in both public and private settings, but access may be delayed in regional and remote areas.
Functional (Non-Ulcer) Dyspepsia
Functional dyspepsia (FD) is the single most common cause of dyspepsia after investigation, accounting for 50–70% of all cases. It is defined by the Rome IV criteria as one or more of: bothersome postprandial fullness, bothersome early satiation, bothersome epigastric pain, or bothersome epigastric burning, with no evidence of structural disease on endoscopy, and with symptoms present for the last 3 months with onset ≥6 months prior to diagnosis.
Rome IV Subtypes
Pathophysiology
The pathogenesis of FD is multifactorial and involves visceral hypersensitivity, impaired gastric accommodation (fundic relaxation), delayed gastric emptying, disordered duodenal motility, low-grade mucosal inflammation, altered gut microbiome, and central sensitisation with psychological comorbidity (anxiety, depression). Post-infectious FD may follow acute gastroenteritis in 10–15% of cases.
Management of Functional Dyspepsia
Management is stepwise and requires a strong patient–doctor relationship, as FD is a chronic relapsing condition.
Pharmacotherapy — Drug Cards
H. pylori Testing & GORD
Helicobacter pylori — Testing
Helicobacter pylori infection affects approximately 20–30% of the Australian adult population overall, though prevalence is significantly higher in immigrants from high-prevalence countries and in Aboriginal and Torres Strait Islander communities (up to 70–90% in some remote regions). H. pylori is classified as a Group 1 carcinogen by IARC and is the principal cause of peptic ulcer disease and a significant risk factor for gastric adenocarcinoma and MALT lymphoma.
Indications for H. pylori Testing
- Uninvestigated dyspepsia in patients <60 years without alarm features (test-and-treat strategy)
- Active or past peptic ulcer disease
- Gastric MALT lymphoma
- Early gastric cancer resection
- First-degree relative with gastric cancer
- Long-term low-dose aspirin or NSAID users with dyspepsia
- Unexplained iron-deficiency anaemia
- Idiopathic thrombocytopenic purpura
Preferred Diagnostic Tests
H. pylori Eradication Regimens
Australian clarithromycin resistance rates are estimated at 5–15% overall but are higher in certain populations (immigrants from high-resistance regions, prior macrolide exposure). First-line therapy is selected based on local resistance patterns and patient allergy history.
Second-Line and Rescue Therapy
If first-line triple therapy fails, options include: (1) bismuth quadruple therapy (if not already used); (2) levofloxacin-based triple (PPI + amoxicillin 1 g BD + levofloxacin 500 mg daily × 14 days) — increasingly limited by fluoroquinolone resistance; (3) rifabutin-based rescue (specialist-initiated). Confirm eradication with UBT or SAT ≥4 weeks after completion of therapy — this is mandatory after treatment.
Gastro-Oesophageal Reflux Disease (GORD)
GORD is the most common organic cause of dyspepsia and is characterised by troublesome heartburn and/or regurgitation due to reflux of gastric contents into the oesophagus. Prevalence in Australia is approximately 15–20% of adults.
Diagnosis
Clinical diagnosis is appropriate when classic symptoms (retrosternal burning, acid regurgitation) are present without alarm features. The Lyon consensus recommends empiric PPI trial for 8 weeks as initial management. OGD is indicated for alarm features, age ≥60, or failure of PPI therapy.