Diagnosis and Management of Functional Dyspepsia

Primary Diagnosis and Evaluation

The American Gastroenterological Association recommends that patients with dyspeptic symptoms, such as upper abdominal fluttering, bloating, early satiety, and post-meal sleepiness, should be evaluated for functional dyspepsia, specifically the postprandial distress subtype, with consideration of postprandial hypotension or reactive hypoglycemia 1, 2
The presence of post-meal sleepiness, which is atypical for isolated functional dyspepsia, raises concern for dumping syndrome, particularly late dumping with reactive hypoglycemia, if there is a history of gastric or bariatric surgery, or postprandial hypotension in elderly patients 3

The American College of Gastroenterology recommends excluding alarm features that mandate urgent endoscopy, including age ≥55 years with new-onset symptoms, unintentional weight loss >10%, persistent vomiting or dysphagia, and family history of gastric or esophageal cancer 1, 2, 4, 5
The evaluation of post-meal sleepiness should include checking orthostatic vital signs to exclude postprandial hypotension, obtaining a detailed surgical history to suspect dumping syndrome, and considering reactive hypoglycemia 3

The European Society for Neurogastroenterology and Motility recommends testing for H. pylori with stool antigen or breath testing, and eradicating with antibiotic therapy if positive, as this resolves symptoms in a subset of patients and is the only intervention that may alter the natural history of functional dyspepsia 1, 2, 4
A high-dose proton pump inhibitor therapy should be initiated for 4-8 weeks while awaiting H. pylori results, as PPIs are first-line for ulcer-like dyspepsia with 80-90% healing rates for duodenal ulcers 4

The American Gastroenterological Association recommends tricyclic antidepressants (TCAs) as the next step if PPI therapy fails after H. pylori eradication, as TCAs work as neuromodulators, reducing abnormal nerve sensitivity in the gut-brain axis 1, 4
Prokinetic agents, such as metoclopramide, prucalopride, or ghrelin agonists, should be considered for prominent early satiety and postprandial fullness 1, 4

The American College of Gastroenterology recommends cognitive behavioral therapy (CBT) and gut-directed hypnotherapy for improving bloating symptoms and quality of life, as these therapies address the dysregulated brain-gut axis that underlies functional dyspepsia 1, 2, 6, 8
Diaphragmatic breathing techniques should be taught for immediate symptom relief, as this reduces vagal tone and sympathetic activity, correcting the paradoxical diaphragmatic contraction that causes visible abdominal distention in many patients with bloating 6, 8

The Endocrine Society recommends evaluating post-meal sleepiness for postprandial hypotension, reactive hypoglycemia, or dumping syndrome, particularly in patients with a history of gastric or bariatric surgery 3
Management of late dumping syndrome includes small, frequent meals, avoiding simple carbohydrates, increasing protein and fiber, and considering acarbose to slow carbohydrate absorption 3