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Peptide

Exenatide (Byetta/Bydureon)

Exenatide is a GLP-1 receptor agonist peptide approved by the FDA for type 2 diabetes, available as twice-daily (Byetta) and once-weekly extended-release (Bydureon) formulations. It is a synthetic version of exendin-4, a 39-amino-acid peptide originally isolated from Gila monster saliva. The DURATION clinical trial program demonstrated efficacy for glycemic control and weight loss, while the EXSCEL trial assessed cardiovascular outcomes.

Research notice. This page is for education and research. Peptides may not be FDA-approved for human use and may only be legally available for research. Talk to a qualified clinician before considering any peptide.

Best evidence
Grade A
Conditions studied
2
Outcomes
17
Graded outcomes
5642

Evidence by condition

  • Strong
  • Moderate
  • Limited
  • Very limited

2 conditions, plus general outcomes

Type 2 Diabetes: outcomes studied for Exenatide (Byetta/Bydureon)
GradeOutcomeEffectSizeStudiesPeopleStudies list
Glycemic Control (HbA1c <7%)

DURATION-1 showed 71% achieved HbA1c <7% and 54% achieved ≤6.5% at 52 weeks with exenatide once weekly.

Changes; see studiesLarge effect32 studies

Studies that measured glycemic control (hba1c <7%)

and 22 more in the citations list

Systolic Blood Pressure

Long-term therapy showed sustained decrease in systolic blood pressure of approximately 2 mmHg over 3-6 years.

Improves (the measure goes down)Small effect32 studies

Studies that measured systolic blood pressure

and 22 more in the citations list

Body Weight Reduction

DURATION trials showed mean weight loss of 2-4 kg over 6 months. DURATION-5 showed 5.1 lb weight loss with Bydureon vs 3.0 lb with Byetta.

Improves (the measure goes down)Moderate effect31 studies

Studies that measured body weight reduction

and 21 more in the citations list

HbA1c Reduction

DURATION trials showed HbA1c reductions of 1.1-2.0%. DURATION-1 showed sustained 2.0% reduction at 52 weeks with once-weekly formulation.

Improves (the measure goes down)Large effect30 studies

Studies that measured hba1c reduction

and 20 more in the citations list

Fasting Plasma Glucose

DURATION trials showed significant reductions in fasting plasma glucose across all studies vs comparators.

Improves (the measure goes down)Large effect30 studies

Studies that measured fasting plasma glucose

and 20 more in the citations list

Lipid Profile

DURATION trials showed improvements in fasting lipid profiles with exenatide therapy.

Improves (the measure goes down)Small effect29 studies

Cardiovascular Disease: outcomes studied for Exenatide (Byetta/Bydureon)
GradeOutcomeEffectSizeStudiesPeopleStudies list
All-Cause Mortality

EXSCEL showed nominal 14% reduction in all-cause mortality (P=0.016), though this was not the primary endpoint.

Improves (the measure goes down)Moderate effect22 studies

Studies that measured all-cause mortality

and 12 more in the citations list

General

General: outcomes studied for Exenatide (Byetta/Bydureon)
GradeOutcomeEffectSizeStudiesPeopleStudies list
Blood Glucose Control

46 human trials and systematic reviews support this finding. Evidence includes systematic reviews/meta-analyses. Human clinical trial data available.

Improves (the measure goes down)Moderate effect18 studies

Studies that measured blood glucose control

and 8 more in the citations list

Neuroprotection

10 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Moderate effect16 studies

Studies that measured neuroprotection

and 6 more in the citations list

Liver Protection

8 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Moderate effect14 studies

Studies that measured liver protection

and 4 more in the citations list

Cognitive Function

5 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect11 studies

Studies that measured cognitive function

and 1 more in the citations list

Safety/Tolerability

4 human trials and systematic reviews support this finding. Evidence includes systematic reviews/meta-analyses. Human clinical trial data available.

Improves (the measure goes up)Small effect10 studies
Anti-Inflammatory Activity

4 human trials support this finding. Human clinical trial data available.

Improves (the measure goes up)Small effect10 studies
Cancer Cell Apoptosis

4 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect10 studies
GI Protection

3 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect9 studies
Cardiac Protection

2 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect8 studies
Kidney Function

2 preclinical studies support this finding. Primarily preclinical evidence.

Improves (the measure goes up)Small effect8 studies

Key findings

  • Glycemic Control (HbA1c <7%)Type 2 DiabetesChanges; see studies
  • Systolic Blood PressureType 2 DiabetesImproves (the measure goes down)
  • Body Weight ReductionType 2 DiabetesImproves (the measure goes down)

Studies cited

67 studies from PubMed

  1. Exenatide Is Neuroprotective in a New Rabbit Model of Hypoxia-Ischemia.Cells, 2025 · PMID 41227362
  2. Cardiovascular outcomes with exenatide in type 2 diabetes according to ejection fraction: The EXSCEL trialEur J Heart Fail, 2024 · PMID 39381950
  3. Long-acting exenatide does not prevent cognitive decline in mild cognitive impairment: a proof-of-concept clinical trial.Journal of endocrinological investigation, 2024 · PMID 38565814
  4. Exenatide-Modified Deferoxamine-Based Nanoparticles Ameliorates Neurological Deficits in Parkinson's Disease Mice.International journal of nanomedicine, 2024 · PMID 39430307
  5. Effect of glucagon like peptide-1 receptor agonist exenatide, used as an intracranial pressure lowering agent, on cognition in Idiopathic Intracranial Hypertension.Eye (London, England), 2024 · PMID 38212401
  6. Drug release profile of a novel exenatide long-term drug delivery system (OKV-119) administered to cats.BMC veterinary research, 2024 · PMID 38762728
  7. Exenatide administration time-dependently affects the hepatic circadian clock through glucagon-like peptide-1 receptors in the central nervous system.Biochemical pharmacology, 2024 · PMID 39369911
  8. Exenatide improves hypogonadism and attenuates inflammation in diabetic mice by modulating gut microbiota.International immunopharmacology, 2023 · PMID 37210914
  9. An injectable PEG-like conjugate forms a subcutaneous depot and enables sustained delivery of a peptide drug.Biomaterials, 2023 · PMID 36630826
  10. Screening for Inflammatory Markers Identifies IL-18Rα as a Potential Link between Exenatide and Its Anti-Inflammatory Effect: New Results from the Combat-JUDO Randomized Controlled Trial.Annals of nutrition & metabolism, 2023 · PMID 37883939
  11. Defining the Intravital Renal Disposition of Fluorescence-Quenched Exenatide.Molecular pharmaceutics, 2023 · PMID 36626167
  12. Comparison of exenatide alone or combined with metformin versus metformin in the treatment of polycystic ovaries: a systematic review and meta-analysis.BMC endocrine disorders, 2023 · PMID 37974132
  13. hUCMSCs carrying exenatide prevent T1DM by improving intestinal microflora composition and islet tissue damage repair.Molecular medicine (Cambridge, Mass.), 2022 · PMID 36514009
  14. Exenatide for weight-loss maintenance in adolescents with severe obesity: A randomized, placebo-controlled trial.Obesity (Silver Spring, Md.), 2022 · PMID 35403350
  15. Exenatide increases CTRP3 gene expression in adipose cells by inhibiting adipogenesis and induces apoptosis.Toxicology in vitro : an international journal published in association with BIBRA, 2022 · PMID 36152787
  16. Exenatide improves hepatocyte insulin resistance induced by different regional adipose tissue.Frontiers in endocrinology, 2022 · PMID 36246878
  17. Exenatide exerts a neuroprotective effect against diabetic cognitive impairment in rats by inhibiting apoptosis: Role of the JNK/c‑JUN signaling pathway.Molecular medicine reports, 2022 · PMID 35119079
  18. Exenatide ameliorates hydrogen peroxide-induced pancreatic β-cell apoptosis through regulation of METTL3-mediated m(6)A methylation.European journal of pharmacology, 2022 · PMID 35436474
  19. Exenatide once weekly for alcohol use disorder investigated in a randomized, placebo-controlled clinical trial.JCI insight, 2022 · PMID 36066977
  20. Exenatide Attenuates Obesity-Induced Mitochondrial Dysfunction by Activating SIRT1 in Renal Tubular Cells.Frontiers in endocrinology, 2021 · PMID 34434166
  21. Exenatide Attenuates Non-Alcoholic Steatohepatitis by Inhibiting the Pyroptosis Signaling Pathway.Frontiers in endocrinology, 2021 · PMID 33953700
  22. Efficacy and Safety Over 2 Years of Exenatide Plus Dapagliflozin in the DURATION-8 Study: A Multicenter, Double-Blind, Phase 3, Randomized Controlled TrialDiabetes Care, 2020 · PMID 32816874
  23. Microvascular and Cardiovascular Outcomes According to Renal Function in Patients Treated With Once-Weekly Exenatide: Insights From the EXSCEL TrialDiabetes Care, 2020 · PMID 31757838
  24. GLP-1 receptor agonists for Parkinson's disease.The Cochrane database of systematic reviews, 2020 · PMID 32700772
  25. Quality by design thinking in the development of long-acting injectable PLGA/PLA-based microspheres for peptide and protein drug delivery.International journal of pharmaceutics, 2020 · PMID 32442645
  26. Exenatide-loaded inside-porous poly(lactic-co-glycolic acid) microspheres as a long-acting drug delivery system with improved release characteristics.Drug delivery, 2020 · PMID 33241694
  27. The efficacy and safety of exenatide once weekly in patients with type 2 diabetes.Expert opinion on pharmacotherapy, 2019 · PMID 30730773
  28. Exenatide alleviates mitochondrial dysfunction and cognitive impairment in the 5×FAD mouse model of Alzheimer's disease.Behavioural brain research, 2019 · PMID 31082410
  29. A Pilot Study of Exenatide Actions in Alzheimer's Disease.Current Alzheimer research, 2019 · PMID 31518224
  30. Exenatide corrects postprandial hyperglycaemia in young people with cystic fibrosis and impaired glucose tolerance: A randomized crossover trial.Diabetes, obesity & metabolism, 2019 · PMID 30259623
  31. Exenatide alleviates adriamycin-induced heart dysfunction in mice: Modulation of oxidative stress, apoptosis and inflammation.Chemico-biological interactions, 2019 · PMID 30885636
  32. Exenatide mitigates inflammation and hypoxia along with improved angiogenesis in obese fat tissue.The Journal of endocrinology, 2019 · PMID 31137012
  33. Do GLP-1 Receptor Agonists Care if You Have Heart Failure?Circulation, 2019 · PMID 31710527
  34. Effect of Once-Weekly Exenatide on Clinical Outcomes According to Baseline Risk in Patients With Type 2 Diabetes Mellitus: Insights From the EXSCEL TrialJ Am Heart Assoc, 2018 · PMID 30371301
  35. Efficacy and Safety of Once-Weekly Semaglutide Versus Exenatide ER in Subjects With Type 2 Diabetes (SUSTAIN 3): A 56-Week, Open-Label, Randomized Clinical TrialDiabetes Care, 2018 · PMID 29246950
  36. Protective effects of the GLP-1 mimetic exendin-4 in Parkinson's disease.Neuropharmacology, 2018 · PMID 28927992
  37. Effects of Once-Weekly Exenatide on Cardiovascular Outcomes in Type 2 DiabetesN Engl J Med, 2017 · PMID 28910237
  38. Baseline characteristics of patients enrolled in the Exenatide Study of Cardiovascular Event Lowering (EXSCEL)Am Heart J, 2017 · PMID 28454792
  39. A Review of the Long-Term Efficacy, Tolerability, and Safety of Exenatide Once Weekly for Type 2 Diabetes.Advances in therapy, 2017 · PMID 28674957
  40. No cognitive-enhancing effect of GLP-1 receptor agonism in antipsychotic-treated, obese patients with schizophrenia.Acta psychiatrica Scandinavica, 2017 · PMID 28260235
  41. Is Exenatide a Treatment for Parkinson's Disease?Journal of Parkinson's disease, 2017 · PMID 28777758
  42. Rationale and design of the EXenatide Study of Cardiovascular Event Lowering (EXSCEL) trialAm Heart J, 2016 · PMID 26995376
  43. Exenatide Once Weekly: A Review of Pharmacology and Treatment Considerations in Type 2 Diabetes.Clinical therapeutics, 2016 · PMID 26926319
  44. Exenatide in obese or overweight patients without diabetes: A systematic review and meta-analyses of randomized controlled trials.International journal of cardiology, 2016 · PMID 27343423
  45. The Use of Exenatide in Managing Markers of Cardiovascular Risk in Patients with Type 2 Diabetes: A Systematic Review.International journal of environmental research and public health, 2016 · PMID 27669277
  46. Exenatide Extended-Release: An Updated Review of Its Use in Type 2 Diabetes Mellitus.Drugs, 2015 · PMID 26071140
  47. Exenatide twice daily: a review of its use in the management of patients with type 2 diabetes mellitus.Drugs, 2014 · PMID 24435322
  48. Efficacy, safety, and tolerability of exenatide once weekly in patients with type 2 diabetes mellitus: an integrated analysis of the DURATION trialsPostgrad Med, 2013 · PMID 23748506
  49. Once weekly exenatide: efficacy, tolerability and place in therapy.Diabetes, obesity & metabolism, 2013 · PMID 23425609
  50. Exenatide as a novel weight loss modality in patients without diabetes.The Annals of pharmacotherapy, 2012 · PMID 23191935
  51. Exenatide extended-release: a review of its use in type 2 diabetes mellitus.Drugs, 2012 · PMID 22867046
  52. DURATION-5: exenatide once weekly resulted in greater improvements in glycemic control compared with exenatide twice daily in patients with type 2 diabetesJ Clin Endocrinol Metab, 2011 · PMID 21307137
  53. DURATION-1: exenatide once weekly produces sustained glycemic control and weight loss over 52 weeksDiabetes Care, 2010 · PMID 20215461
  54. Exenatide and weight loss.Nutrition (Burbank, Los Angeles County, Calif.), 2010 · PMID 20152707
  55. Exenatide efficacy and safety: a systematic review.Diabetic medicine : a journal of the British Diabetic Association, 2009 · PMID 19719703
  56. Acute exenatide (Byetta) poisoning was not associated with significant hypoglycemia.Clinical toxicology (Philadelphia, Pa.), 2008 · PMID 17852164
  57. Addition of thiazolidinedione or exenatide to oral agents in type 2 diabetes: a meta-analysis.The Annals of pharmacotherapy, 2008 · PMID 18957626
  58. Exenatide (Byetta) as a novel treatment option for type 2 diabetes mellitusP T, 2007 · PMID 17252050
  59. Exenatide: a review of its use in patients with type 2 diabetes mellitus (as an adjunct to metformin and/or a sulfonylurea).Drugs, 2007 · PMID 17428109
  60. Is exenatide advancing the treatment of type 2 diabetes?Expert opinion on pharmacotherapy, 2006 · PMID 16370928
  61. Is exenatide a useful addition to diabetes therapy?Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists, 2006 · PMID 16772206
  62. Exenatide: a novel incretin mimetic agent for treating type 2 diabetes mellitus.Cardiology in review, 2006 · PMID 16788334
  63. Exenatide: an incretin mimetic for the treatment of type 2 diabetes mellitus.Clinical therapeutics, 2006 · PMID 16861088
  64. Exenatide: a new option for the treatment of type 2 diabetes.The Annals of pharmacotherapy, 2006 · PMID 16985091
  65. Exenatide in type 2 diabetes: treatment effects in clinical studies and animal study data.International journal of clinical practice, 2006 · PMID 17109672
  66. Byetta (exenatide): what's your gut feeling?South Dakota medicine : the journal of the South Dakota State Medical Association, 2006 · PMID 16610466
  67. Exenatide (Byetta) for type 2 diabetes.The Medical letter on drugs and therapeutics, 2005 · PMID 15933616