IBS vs Gastroparesis: When Delayed Stomach Emptying Is the Real Problem
Gastroparesis is characterized by delayed gastric emptying without mechanical obstruction. Symptoms include early satiety, nausea, bloating, upper abdominal pain, and vomiting, many of which overlap with IBS. A gastric emptying study is required for diagnosis, but it is not part of the standard IBS workup, leaving many cases unidentified.
Current Consensus
- Gastroparesis requires documented delayed gastric emptying on a 4-hour scintigraphy study for diagnosis.
- The most common causes are diabetic, post-surgical, and idiopathic, with idiopathic accounting for roughly one-third of cases.
- Upper GI symptoms (nausea, early satiety, postprandial fullness) are more suggestive of gastroparesis than IBS, though lower GI symptoms can coexist.
- Gastroparesis and SIBO frequently co-occur because impaired motility creates conditions favorable for bacterial overgrowth.
- Prokinetic agents (metoclopramide, domperidone) are the primary pharmacologic treatment, distinct from IBS therapies.
Open Questions
- Optimal diagnostic criteria for distinguishing gastroparesis from functional dyspepsia with mildly delayed emptying.
- Whether gastric per-oral endoscopic myotomy (G-POEM) will become a standard treatment option for refractory gastroparesis.
- The role of the gut microbiome in gastroparesis pathogenesis and symptom severity.
- Whether treating co-occurring SIBO improves gastroparesis symptoms or vice versa.
- Long-term safety of prokinetic agents, particularly metoclopramide and its tardive dyskinesia risk.
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Medical Disclaimer: The content in this section is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult with a qualified healthcare professional before making changes to your health regimen. GLP1Gut is a tracking tool, not a medical device.