Exenatide vs Semaglutide
Side-by-side comparison of key properties, dosing, and research.
GLP-1 / Weight Loss AgonistsCognitive Enhancement
ExenatideGLP-1 / Weight Loss Agonists
Semaglutide- Summary
- Exenatide is a GLP-1 receptor agonist derived from the Gila monster lizard peptide exendin-4, with 53% homology to human GLP-1 and natural resistance to DPP-4 degradation. Available as twice-daily (Byetta) or once-weekly (Bydureon) formulation, it is also being studied for Parkinson's disease neuroprotection.
- Semaglutide is an FDA-approved GLP-1 receptor agonist originally developed for type 2 diabetes that has proven remarkably effective for weight loss. Clinical trials show average 15–20% body weight reduction. It is marketed as Ozempic (diabetes) and Wegovy (weight management).
- Half-Life
- ~2.4 hours (Byetta/twice-daily); Bydureon BCISE: weekly via microsphere release
- ~7 days
- Admin Route
- SubQ
- SubQ, Oral
- Research
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- —
- Typical Dose
- 5 mcg, titrate to 10 mcg
- 0.25 mg → 0.5 mg → 1 mg → 1.7 mg → 2.4 mg
- Frequency
- Twice daily
- Once weekly, subcutaneous
- Key Benefits
- Blood glucose control in type 2 diabetes
- Weight loss (average 2–3 kg in clinical trials)
- Once-weekly extended-release formulation available
- Reduces appetite and food intake
- Possible neuroprotective in Parkinson's disease (Phase II trials)
- Reduces systemic inflammation
- May protect pancreatic beta cells
- Cardiovascular neutral or potentially protective
- Average 15–20% body weight reduction in clinical trials (STEP trials)
- Significant reduction in appetite and food cravings
- Improvement in blood sugar control and insulin sensitivity
- Reduces cardiovascular risk (SELECT trial: 20% reduction in MACE)
- May reduce risk of kidney disease
- Improves metabolic markers (cholesterol, blood pressure)
- FDA-approved — extensively studied with robust safety data
- Weekly dosing convenience
- Side Effects
- Nausea (most common, especially initially)
- Vomiting
- Diarrhea
- Headache
- +4 more
- Nausea (most common, especially during titration)
- Vomiting
- Diarrhea or constipation
- Abdominal discomfort
- +4 more
- Stacks With
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