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Exenatide (Byetta, Bydureon)

Also known as Byetta, Bydureon and Exendin-4.

Approved in the US and the EU for type 2 diabetes. Its own long-term heart-outcome data are limited next to those of newer GLP-1 drugs.

HisGlyGluGlyThrPheThrSerAspLeuSerLysGlnMetGluGluGluAlaValArgLeuPheIleGluTrpLeuLysAsnGlyGlyProSerSerGlyAlaProProProSer
39 amino acids, in order. End caps, bridges and anything attached to the chain are not drawn. Source: PubChem.
Human evidence
Grade A

Large trials

Completed randomized trials
8+

The plus sign marks a floor: the record counts more trials than it lists.

Approved?
US and EU

Approved in the US and the EU

Sport (WADA)
Not named

Not named on WADA's list. That is not clearance.

Checked on .

How we count a trial
Short answer

As of September 2026, exenatide is an approved medicine in the US and the EU for type 2 diabetes. The FDA approved it as Byetta in 2005 and as Bydureon in 2012. Those approvals cover the two branded products. If a vial sold as exenatide came from somewhere else, the approval trials did not test it, and you cannot see from the outside what it holds.

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What is exenatide?

Exenatide is a synthetic version of exendin-4 that acts like GLP-1, a hormone the body makes. Exendin-4 was first isolated from the Gila monster, a lizard, and the researcher John Eng discovered it in the early 1990s. The FDA approved exenatide in 2005 as Byetta and in 2012 as Bydureon.

Does exenatide work?

For type 2 diabetes, the FDA and the EMA reviewed the trials and approved it. In the US the approved use is as an add-on for blood sugar control.

What we found. 8+ completed randomized trials counted on the record. 2 human study rows listed below, so the number shows with a plus sign until every trial is listed. Both rows stand for groups of trials. The third row is the 1992 discovery paper.

Studies on the exenatide record: each study, what it was tested in, its status and what it shows.
Byetta approval trials (Phase 3)PeopleCompleted. Byetta was approved in 2005Lower HbA1c, a blood sugar measure, as an add-on treatment in type 2 diabetes
Bydureon extended-release programPeopleCompleted. Bydureon was approved in 2012Blood sugar control as good as or better than the earlier version of exenatide
Paper isolating exendin-4 from Gila monster venomAnimalsPublished 1992The discovery paper for exendin-4, the peptide later developed into exenatide
How we count a trial

Is exenatide safe?

The record names stomach and gut side effects and rare reports of pancreatitis. It carries a boxed warning about thyroid C-cell tumors seen in rodent studies. What that rodent finding means for people is unresolved. Long-term heart-outcome data for exenatide itself are limited next to newer GLP-1 drugs. These are facts about Byetta and Bydureon. Any other vial is the subject of the section after the legal lines.

What is in a vial sold as exenatide?

The trials above tested the approved products, Byetta and Bydureon. This record holds no sign that exenatide is sold outside pharmacies. If a vial reached you outside a pharmacy, none of those trials tested it, and the checklist lists what to ask the seller.

What don't we know?

  • What long-term use does to heart outcomes. Exenatide's own data are limited next to newer drugs.
  • What the rodent thyroid tumor finding means for people.
  • What is in any vial that did not come from a pharmacy.

The other side

Byetta and Bydureon come with a prescription and a doctor's care. The record calls exenatide the first approved drug of the GLP-1 class, and it is still approved and actively prescribed. The open questions on this page concern long-term heart data and the rodent thyroid finding.

What would change this record?

  • A dedicated long-term trial of heart outcomes for exenatide.

Change log

  • Record checked. No change logged yet.
Every change on the Table

Three questions to ask next

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More questions about exenatide

Is Byetta the same as exenatide?

Byetta is one of two brand names for exenatide. The other is Bydureon.

What is exenatide approved for?

Type 2 diabetes. In the US it is approved as an add-on for blood sugar control, and the EMA approved it for type 2 diabetes.

Does exenatide come from a lizard?

It is a synthetic version of a lizard peptide. That peptide, exendin-4, was first isolated from the Gila monster.

Was exenatide the first GLP-1 drug?

Yes, on this record. It calls exenatide the first approved drug of the GLP-1 class, and the FDA approved it in 2005.

Is exenatide banned in sport?

It is not named on WADA's list. The record gives no sport source for that. If you compete, check the current List.
Sources

Record checked on . Each source shows the date it was checked.

Metabolic and weight

In the same group

All 12 in this group
Still curious

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