Semaglutide vs Liraglutide: Head-to-Head Comparison
Both are FDA-approved GLP-1 receptor agonists for diabetes and obesity. Semaglutide (Ozempic/Wegovy) is dosed weekly and produces greater weight loss (~15%). Liraglutide (Victoza/Saxenda) is dosed daily with more long-term safety data. Semaglutide has largely replaced liraglutide as first-line in clinical practice.
Side-by-Side Comparison
| Dimension | Semaglutide | Liraglutide |
|---|---|---|
| Evidence Level | Level A — multiple large RCTs (STEP, SUSTAIN, SELECT) | Level A — multiple large RCTs (SCALE, LEADER) |
| FDA Status | Approved for T2D (Ozempic) and obesity (Wegovy) | Approved for T2D (Victoza) and obesity (Saxenda) |
| Weight Loss Efficacy | ~15% mean body weight loss (STEP 1) | ~8% mean body weight loss (SCALE) |
| Dosing Convenience | Once weekly injection; oral option (Rybelsus) | Daily injection required |
| Side Effects | GI side effects; similar profile but higher potency | GI side effects; well-characterized over 10+ years |
| Long-Term Data | Strong CV data (SELECT); ~5 years post-approval | 10+ years of real-world data; LEADER CV benefit proven |
Peptide Overviews
Semaglutide
AFDA ApprovedSemaglutide is a GLP-1 receptor agonist approved by the FDA for type 2 diabetes (Ozempic, Rybelsus) and chronic weight management (Wegovy). One of the most studied peptide drugs in recent history.
Liraglutide
AFDA ApprovedLiraglutide is a GLP-1 receptor agonist approved by the FDA for type 2 diabetes (Victoza) and chronic weight management (Saxenda). It was the first GLP-1 agonist approved specifically for obesity.
Semaglutide vs Liraglutide: FAQ
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No claims of therapeutic efficacy are made for substances that are not FDA-approved for the discussed indications. Research citations reflect published findings and do not imply endorsement.