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#96

Glucagon

MetabolicGlucaGenBaqsimiGvokeGlucagon HydrochlorideGlucagon for Injection

A 29-amino acid peptide hormone produced by pancreatic alpha cells that raises blood glucose levels, used as emergency treatment for severe hypoglycemia and as a diagnostic agent in radiology and gastroenterology.

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Overview

Glucagon is a 29-amino acid peptide hormone naturally produced by alpha cells of the pancreatic islets of Langerhans. It functions as the primary counter-regulatory hormone to insulin, playing a critical role in glucose homeostasis by stimulating hepatic glycogenolysis (breakdown of glycogen to glucose) and gluconeogenesis (synthesis of new glucose from non-carbohydrate precursors). When blood glucose falls, glucagon is released to mobilize glucose stores and restore normoglycemia.

The most important clinical application of glucagon is the emergency treatment of severe hypoglycemia, particularly in patients with diabetes who are unable to take oral carbohydrates due to altered consciousness or seizures. For decades, glucagon was available only as a lyophilized powder requiring reconstitution before injection — a complex process during an emergency. Recent innovations have addressed this limitation with the development of a nasal powder formulation (Baqsimi) and a ready-to-use liquid injectable formulation (Gvoke), dramatically improving the ease of emergency glucagon administration by non-medical caregivers.

Beyond emergency hypoglycemia treatment, glucagon has important applications in diagnostic radiology and gastroenterology. Glucagon relaxes smooth muscle throughout the gastrointestinal tract, which is valuable for reducing bowel motion artifacts during CT, MRI, and fluoroscopic examinations and for facilitating endoscopic procedures including ERCP. Its hyperglycemic and smooth muscle relaxant effects make it a versatile tool in both emergency and diagnostic medicine.

Glucagon also plays a role in the investigation of pheochromocytoma (glucagon provocation test) and in the evaluation of growth hormone reserve (glucagon stimulation test for growth hormone deficiency). The glucagon stimulation test has become an important alternative to the insulin tolerance test for GH reserve evaluation, as it does not require insulin-induced hypoglycemia.

Research Uses & Applications

  • Emergency treatment of severe hypoglycemia in diabetes patients
  • Diagnostic smooth muscle relaxation for GI radiology (CT, MRI, fluoroscopy)
  • Glucagon stimulation test for growth hormone deficiency diagnosis
  • Facilitation of endoscopic procedures (ERCP, colonoscopy)
  • Glucagon provocation test for pheochromocytoma (rarely used)
  • Treatment of beta-blocker and calcium channel blocker overdose (high-dose)

Key Research Findings

  • Clinical trials showed intranasal glucagon (Baqsimi) achieves glucose recovery comparable to intramuscular glucagon injection with significantly easier administration.
  • Studies confirmed glucagon injection raises blood glucose by an average of 80-120 mg/dL within 10-20 minutes in hypoglycemic individuals with adequate glycogen stores.
  • Research validated the glucagon stimulation test as a reliable alternative to the insulin tolerance test for GH deficiency diagnosis, with a GH cutoff of 3 ng/mL.
  • Studies in beta-blocker overdose demonstrated high-dose glucagon (5-10 mg bolus) can improve heart rate and blood pressure through cAMP-mediated positive chronotropic and inotropic effects.
  • Clinical research showed subcutaneous auto-injectable glucagon (Gvoke) achieves comparable pharmacokinetics and efficacy to reconstituted glucagon injection.

Risks & Side Effects

  • Nausea and vomiting are the most common side effects, occurring in approximately 30% of patients.
  • Ineffective in patients with depleted hepatic glycogen stores (prolonged fasting, chronic alcohol use, adrenal insufficiency).
  • Hyperglycemia with excessive or repeated dosing.
  • Rare allergic reactions; generally well-tolerated.
  • Transient hypertension and tachycardia with high doses.

Administration

For severe hypoglycemia: 1 mg (adults) or 0.5 mg (children <25 kg) via intramuscular, subcutaneous, or intravenous injection; or 3 mg intranasal powder (one nostril). For GI imaging: 0.2-1 mg IV or IM. For GH stimulation test: 1 mg IM (or 1.5 mg if >90 kg) with GH sampling at 0, 30, 60, 90, 120, 150, 180 minutes. Auto-injectable formulations (Gvoke) available in 0.5 mg and 1 mg doses.

Legal Status

FDA-approved prescription medication available in multiple formulations: injectable (GlucaGen, Gvoke), intranasal (Baqsimi), and generic glucagon for injection. Available by prescription; some formulations may be carried by patients for emergency use. Not a controlled substance.

Frequently Asked Questions

What is Glucagon?

A 29-amino acid peptide hormone produced by pancreatic alpha cells that raises blood glucose levels, used as emergency treatment for severe hypoglycemia and as a diagnostic agent in radiology and gastroenterology.

What are the main uses of Glucagon?

The primary research applications of Glucagon include: Emergency treatment of severe hypoglycemia in diabetes patients; Diagnostic smooth muscle relaxation for GI radiology (CT, MRI, fluoroscopy); Glucagon stimulation test for growth hormone deficiency diagnosis; Facilitation of endoscopic procedures (ERCP, colonoscopy); Glucagon provocation test for pheochromocytoma (rarely used); Treatment of beta-blocker and calcium channel blocker overdose (high-dose).

What are the risks and side effects of Glucagon?

Documented risks and side effects include: Nausea and vomiting are the most common side effects, occurring in approximately 30% of patients.; Ineffective in patients with depleted hepatic glycogen stores (prolonged fasting, chronic alcohol use, adrenal insufficiency).; Hyperglycemia with excessive or repeated dosing.; Rare allergic reactions; generally well-tolerated.; Transient hypertension and tachycardia with high doses.. Always consult a healthcare professional before considering any peptide.

Is Glucagon legal?

FDA-approved prescription medication available in multiple formulations: injectable (GlucaGen, Gvoke), intranasal (Baqsimi), and generic glucagon for injection. Available by prescription; some formulations may be carried by patients for emergency use. Not a controlled substance.

How is Glucagon administered?

For severe hypoglycemia: 1 mg (adults) or 0.5 mg (children <25 kg) via intramuscular, subcutaneous, or intravenous injection; or 3 mg intranasal powder (one nostril). For GI imaging: 0.2-1 mg IV or IM. For GH stimulation test: 1 mg IM (or 1.5 mg if >90 kg) with GH sampling at 0, 30, 60, 90, 120, 150, 180 minutes. Auto-injectable formulations (Gvoke) available in 0.5 mg and 1 mg doses.

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The information on this page is for educational and informational purposes only. It is not intended as medical advice. Always consult a qualified healthcare professional before considering any peptide or supplement. 50 Best Limited does not endorse, recommend, or promote the use of any peptide for self-administration. Read our full disclaimer.

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