Semaglutide vs Liraglutide: Which GLP-1 Is Better for Weight Loss?
Semaglutide vs liraglutide: compare Wegovy/Ozempic vs Saxenda for weight loss, efficacy, dosing, side effects, cost, and which medication is right for you.
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Quick answer: semaglutide vs liraglutide
Semaglutide (Wegovy, Ozempic) is more effective than liraglutide (Saxenda) for weight loss, producing approximately 15% body weight loss versus 8% for liraglutide. Semaglutide also requires only a weekly injection compared to liraglutide's daily injection. In 2026, semaglutide is generally the preferred choice, though liraglutide may still be used for patients who cannot tolerate semaglutide or prefer a daily routine.
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Side-by-side comparison
| Feature | Semaglutide (Wegovy) | Liraglutide (Saxenda) |
|---|---|---|
| Drug class | GLP-1 receptor agonist | GLP-1 receptor agonist |
| FDA approval | 2021 (weight management) | 2014 (weight management) |
| Dosing frequency | Once weekly | Once daily |
| Max dose | 2.4 mg/week | 3.0 mg/day |
| Avg weight loss | ~15% (68 weeks) | ~8% (56 weeks) |
| Nausea rate | ~44% | ~35% |
| Cost (no insurance) | $149-$1,349/month | $1,300+/month |
| Route | Injection (also oral available) | Injection only |
| Titration period | 16 weeks | 5 weeks |
Efficacy: weight loss results
The STEP 1 trial for semaglutide (Wegovy) reported an average of 14.9% body weight loss over 68 weeks, with 86% of participants achieving at least 5% weight loss and 69% achieving at least 10%. The SCALE trial for liraglutide (Saxenda) reported an average of 8.0% body weight loss over 56 weeks, with 63% achieving at least 5% and 33% achieving at least 10%.
Semaglutide is nearly twice as effective as liraglutide for weight loss. For more details, see our semaglutide weight loss guide and GLP-1 success rate guide.
Dosing comparison
Semaglutide (Wegovy) titration schedule
- Weeks 1–4: 0.25 mg weekly
- Weeks 5–8: 0.5 mg weekly
- Weeks 9–12: 1.0 mg weekly
- Weeks 13–16: 1.7 mg weekly
- Week 17+: 2.4 mg weekly (maintenance)
Liraglutide (Saxenda) titration schedule
- Week 1: 0.6 mg daily
- Week 2: 1.2 mg daily
- Week 3: 1.8 mg daily
- Week 4: 2.4 mg daily
- Week 5+: 3.0 mg daily (maintenance)
Semaglutide's weekly dosing is significantly more convenient than liraglutide's daily injections. For full dosing details, see our semaglutide dosage guide and GLP-1 dosage chart.
Cost comparison
| Option | Monthly Cost | Notes |
|---|---|---|
| Compounded semaglutide | $149-$299 | Cheapest option, no insurance |
| Wegovy (self-pay) | $199-$399 | Brand-name, FDA-approved |
| Wegovy (with insurance) | $25-$50 | With savings card |
| Saxenda (retail, no insurance) | $1,300+ | Expensive, limited savings |
| Saxenda (with insurance) | $25-$50 | With savings card |
Side effects comparison
Both medications share similar GLP-1 side effects, primarily gastrointestinal:
- Nausea: semaglutide ~44%, liraglutide ~35%
- Diarrhea: semaglutide ~31%, liraglutide ~21%
- Constipation: semaglutide ~24%, liraglutide ~19%
- Vomiting: semaglutide ~24%, liraglutide ~12%
Semaglutide has slightly higher rates of GI side effects, likely due to its higher efficacy and larger weight loss. Most side effects are mild to moderate and resolve within weeks. See our GLP-1 side effects guide for management.
Which should you choose?
Choose semaglutide (Wegovy) if you:
- Want maximum weight loss (~15%)
- Prefer weekly injections over daily
- Want access to compounded (cheaper) options
- Are starting GLP-1 treatment for the first time
Choose liraglutide (Saxenda) if you:
- Cannot tolerate semaglutide's side effects
- Prefer a daily routine over weekly
- Have insurance that covers Saxenda but not Wegovy
- Were already prescribed Saxenda and it's working for you
For most patients in 2026, semaglutide is the better choice due to superior efficacy, convenience, and lower cost through compounded options. For a broader comparison including tirzepatide, see our GLP-1 comparison guide.
FAQ
Is semaglutide better than liraglutide?
Yes. Semaglutide produces ~15% weight loss vs ~8% for liraglutide. It's also weekly vs daily and has cheaper compounded options.
What is the main difference?
Semaglutide is once-weekly with ~15% weight loss. Liraglutide is once-daily with ~8% weight loss. Semaglutide is newer and more effective.
Which is cheaper?
Compounded semaglutide ($149-$299/month) is far cheaper than Saxenda ($1,300+/month). Wegovy self-pay ($199-$399) is also cheaper than Saxenda retail.
Can I switch from liraglutide to semaglutide?
Yes. Many patients switch for greater efficacy and convenience. Your provider will guide the transition.
Does liraglutide have fewer side effects?
Both have similar GI side effects. Semaglutide has slightly higher nausea rates (~44% vs ~35%), but both are generally well-tolerated.
Is Saxenda still prescribed in 2026?
Yes, but it has largely been superseded by semaglutide and tirzepatide. Some patients still use it if they cannot tolerate newer options.
Which has more weight loss: Wegovy or Saxenda?
Wegovy (~15%) is nearly twice as effective as Saxenda (~8%) for weight loss.
Are they the same drug class?
Yes, both are GLP-1 receptor agonists. Semaglutide is longer-acting (weekly), liraglutide is shorter-acting (daily).
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