09/29/2025
Exendin-4 is a bioactive polypeptide of 39 amino acids that is isolated from the saliva or venom of the Gila monster, a lizard species known scientifically as Heloderma suspectum. It acts as a glucagon-like peptide-1 (GLP-1) receptor agonist, enhancing insulin secretion in response to glucose. A synthetic version of exendin-4, called exenatide, is used as a medication to treat type 2 diabetes due to its longer activity compared to the natural human GLP-1 hormone [1][2][3][4][5][6][7].
Sources
[1] Exendin-4 | C184H282N50O60S | CID 56927919 - PubChem https://pubchem.ncbi.nlm.nih.gov/compound/Exendin-4
[2] Exendin-4: From lizard to laboratory...and beyond https://www.nia.nih.gov/news/exendin-4-lizard-laboratory-and-beyond
[3] Diabetes drug from Gila monster venom - Research.va.gov https://www.research.va.gov/research_in_action/Diabetes-drug-from-Gila-monster-venom.cfm
[4] Exendin-4 - Enzo https://www.enzo.com/product/exendin-4/
[5] Exendin-4 - an overview | ScienceDirect Topics https://www.sciencedirect.com/topics/chemistry/exendin-4
[6] Exendin‐4 from Heloderma suspectum venom: From discovery to its ... https://onlinelibrary.wiley.com/doi/10.1111/bcpt.13169
[7] exendin-4 | Ligand page | IUPHAR/BPS Guide to PHARMACOLOGY https://www.guidetopharmacology.org/GRAC/LigandDisplayForward?tab=biology&ligandId=1135
[8] Release of exendin-4 is controlled by mechanical action in Gila ... https://www.sciencedirect.com/science/article/abs/pii/S1095643305003685
[9] Exendin-4 Decelerates Food Intake, Weight Gain, and Fat ... https://academic.oup.com/endo/article-abstract/141/6/1936/2988298
[10] Wegovy was inspired by Gila monster venom – here are some other ... https://www.gavi.org/vaccineswork/wegovy-was-inspired-gila-monster-venom-here-are-some-other-drugs-surprising-origins
Here is a comprehensive list of GLP-1 receptor agonist drugs, including those based on exendin-4 and others used primarily for type 2 diabetes and obesity:
Drugs with human GLP-1 backbone:
- Dulaglutide (brand name Trulicity)
- Liraglutide (brand names Victoza for diabetes, Saxenda for weight loss)
- Semaglutide (brand names Ozempic for diabetes, Wegovy for weight loss)
- Albiglutide (discontinued)
Drugs with exendin-4 backbone:
- Exenatide (brand names Byetta - twice daily injection, Bydureon BCise - once weekly injection)
- Lixisenatide (discontinued)
Dual GIP and GLP-1 receptor agonist:
- Tirzepatide (brand name Mounjaro)
Other notes:
- Exenatide (Byetta and Bydureon) is directly based on exendin-4.
- Rybelsus is an oral form of semaglutide.
- Some drugs like Lixisenatide and Albiglutide have been discontinued.
- Newer agents like Orforglipron are nonpeptide oral GLP-1 receptor agonists in trials.
These drugs are FDA approved for type 2 diabetes and some for obesity, with varying dosage forms and frequency of administration[1][2][3][4][5][6][7][8][9].
Sources
[1] Glucagon-Like Peptide-1 Receptor Agonists - StatPearls - NCBI https://www.ncbi.nlm.nih.gov/books/NBK551568/
[2] Comparing Ozempic, Wegovy and Other GLP-1 Drugs - GoodRx https://www.goodrx.com/classes/glp-1-agonists/glp-1-drugs-comparison
[3] GLP-1 Agonist List: An Overview of Common Brands & Uses https://www.joincalibrate.com/resources/glp-1-agonist-list
[4] GLP-1 Agonists - Cleveland Clinic https://my.clevelandclinic.org/health/treatments/13901-glp-1-agonists
[5] [PDF] Antidiabetics – GLP-1 Agonistshttps://www.hca.wa.gov/assets/billers-and-providers/antidiabetics-GLP-1-agonists.pdf
[6] GLP-1 Drugs (Incretin Mimetics) - List of Brands & Generics https://www.drugs.com/drug-class/incretin-mimetics.html
[7] GLP-1 Receptor Agonists - The Johns Hopkins Patient Guide to ... https://hopkinsdiabetesinfo.org/medications-for-type-2-diabetes-glp-1-agonists/
[8] Popular Gip Receptor Glp 1 Receptor Agonists List, Drug ... - GoodRx https://www.goodrx.com/classes/gip-receptor-glp-1-receptor-agonists
[9] Diabetes drugs and weight loss - Mayo Clinic https://www.mayoclinic.org/diseases-conditions/type-2-diabetes/expert-answers/byetta/faq-20057955
From rat poison to explosives, many of the drugs we use have interesting origin stories.