Gastrointestinal peptides used in clinical practice

Peptide	Clinical utility
Somatostatin	Gastrointestinal hormone secreting tumors
	Diagnostic radiology
	Variceal hemorrhage
	Bleeding ulcers
	HIV-associated diarrhea
	Other chronic diarrheal syndromes
	Reducing fistula output
Secretin	Diagnosis of Zollinger-Ellison syndrome
	Diagnostic radiology
	Pancreatic function testing
Cholecystokinin	Diagnostic radiology (biliary scintigraphy)
Cholecystokinin	Pancreatic function testing
Glucagon	Therapeutic endoscopy
	Diagnostic radiology
	Treatment of severe hypoglycemia
Pentagastrin	Quantitation of gastric acid output
	Diagnosis and monitoring of medullary thyroid cancer
	Diagnosis of carcinoid syndrome
GLP-1-like agents	Treatment of diabetes mellitus
Motilin-like agents	Treatment of gastroparesis, dysmotility

HIV: human immunodeficiency virus; GLP: glucagon-like peptides.

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