Saxenda vs Zepbound
Editorial comparison of Saxenda (liraglutide) and Zepbound (tirzepatide). Same drug class context, trial-anchored data, no marketing claims.
Side-by-side
| Dimension | Saxenda | Zepbound |
|---|---|---|
| Generic name | liraglutide | tirzepatide |
| Manufacturer | Novo Nordisk | Eli Lilly |
| FDA approved | 2014 | 2023 |
| Mechanism | Single GLP-1 receptor agonist. Same mechanism family as semaglutide/Wegovy but shorter half-life (~13 hours) requiring daily dosing instead of weekly. | Tirzepatide is a dual incretin agonist: it hits both the GLP-1 receptor (like semaglutide) and the GIP receptor (which semaglutide doesn't). |
| Dosing | Titrated weekly: 0.6mg → 1.2mg → 1.8mg → 2.4mg → 3.0mg maintenance, all once daily. | Titrated 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg, every 4 weeks. Maintenance 5-15mg weekly depending on tolerability and target weight. |
| Cost | List price ~$1,350/month. Cash-pay similar. Insurance coverage variable. Cheaper coupons through Novo Nordisk savings card programs. | List price ~$1,000-1,300/month. |
| Pivotal trial result | 8.4% mean body-weight reduction at 56 weeks (3.0 mg dose) | 20.9% mean body-weight reduction at 72 weeks (15 mg dose) |
Full Saxenda review →
FDA-approved daily injectable liraglutide for chronic weight management. Older-generation GLP-1, daily dosing.
Full Zepbound review →
Dual GLP-1/GIP agonist for weight management. ~20% body weight loss in trials — strongest weight-loss drug currently available.
Frequently asked
Is Saxenda or Zepbound more effective?+
In their pivotal trials, Saxenda reported 8.4% mean body-weight reduction at 56 weeks (3.0 mg dose), while Zepbound reported 20.9% mean body-weight reduction at 72 weeks (15 mg dose). Head-to-head results vary by patient profile, dose tolerated, and adherence — these trial numbers describe averages, not what every individual experiences.
How do Saxenda and Zepbound compare on cost?+
Saxenda: List price ~$1,350/month. Cash-pay similar. Insurance coverage variable. Cheaper coupons through Novo Nordisk savings card programs. Zepbound: List price ~$1,000-1,300/month. Lilly's patient assistance program (LillyDirect Self-Pay) offers $399-549/month for self-pay patients depending on dose. Insurance coverage similar pattern to Wegovy. Real out-of-pocket depends on insurance formulary tier, manufacturer savings programs, and whether a direct-pay channel is available.
Can I switch from Saxenda to Zepbound?+
Switching between brand-name treatments in the same drug class is common, but the conversion is not always 1:1. Discuss the switch with your prescriber — they'll usually re-titrate dosing rather than substitute equivalent strengths directly.
Are Saxenda and Zepbound the same drug?+
No. Saxenda (liraglutide) and Zepbound (tirzepatide) are distinct medications from Novo Nordisk and Eli Lilly respectively. They may share a drug class or mechanism but differ in active ingredient, dosing, and approved use.