Exenatide (Byetta/Bydureon)
Overview
A synthetic version of exendin-4, a 39-amino acid peptide originally isolated from the saliva of the Gila monster lizard (Heloderma suspectum). Exenatide shares 53% homology with human GLP-1 and is resistant to DPP-4 degradation. It activates GLP-1 receptors to enhance insulin secretion, suppress glucagon, slow gastric emptying, and promote beta-cell preservation.
Key Research Findings
First GLP-1 RA approved by the FDA (Byetta, 2005). Extended-release formulation (Bydureon) approved in 2012 for once-weekly dosing. Clinical trials demonstrated significant HbA1c reduction and modest weight loss. EXSCEL cardiovascular outcomes trial confirmed cardiovascular safety.
Subcutaneous injection (twice daily or weekly extended-release)
FDA Approved
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