Semaglutide vs Tirzepatide for Weight Loss 2026: Which Is Better?
Semaglutide vs tirzepatide comparison. 15% vs 22.5% weight loss, costs from $147/mo, side effects, dosing, timeline, and which is best for you.
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Semaglutide vs tirzepatide: Which is better for weight loss?
Semaglutide (Wegovy, Ozempic) and tirzepatide (Zepbound, Mounjaro) are the two most effective weight loss medications available. Both are weekly injections, but tirzepatide produces 50% more weight loss — 22.5% vs 15%. This guide compares semaglutide vs tirzepatide on weight loss, cost, side effects, dosing, and more to help you choose the right medication.
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Semaglutide vs tirzepatide comparison table
| Feature | Semaglutide (Wegovy) | Tirzepatide (Zepbound) |
|---|---|---|
| Drug class | GLP-1 agonist | Dual GIP/GLP-1 agonist |
| Avg weight loss | 15% | 22.5% |
| For 200 lb person | 30 lbs | 45 lbs |
| Time to max results | 68 weeks | 72 weeks |
| Max dose | 2.4 mg weekly | 15 mg weekly |
| Frequency | Weekly injection | Weekly injection |
| Brand cost | $1,349/mo | $1,059/mo |
| Compounded cost | $147-$299/mo | $147-$399/mo |
| Common side effects | Nausea, diarrhea, constipation | Nausea, diarrhea, constipation |
| FDA approved for weight loss | Yes (Wegovy) | Yes (Zepbound) |
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Weight loss comparison
Tirzepatide produces significantly more weight loss than semaglutide:
- Semaglutide (Wegovy): 15% average weight loss over 68 weeks
- Tirzepatide (Zepbound): 22.5% average weight loss over 72 weeks
- Difference: 7.5 percentage points more weight loss with tirzepatide
- For a 200 lb person: 30 lbs (semaglutide) vs 45 lbs (tirzepatide) — 15 lbs more with tirzepatide
The reason tirzepatide is more effective is that it's a dual GIP/GLP-1 agonist. It targets two hormones (GIP and GLP-1) instead of just one (GLP-1), resulting in approximately 50% more weight loss.
See our semaglutide results guide and tirzepatide weight loss guide.
Cost comparison
- Brand Wegovy: $1,349/month — $16,188/year
- Brand Zepbound: $1,059/month — $12,708/year
- Compounded semaglutide: $147-$299/month — $1,764-$3,588/year
- Compounded tirzepatide: $147-$399/month — $1,764-$4,788/year
Tirzepatide offers better value: more weight loss per dollar spent. See our semaglutide cost guide and tirzepatide cost guide.
Side effects comparison
Both medications have similar side effect profiles:
- Common: Nausea, diarrhea, constipation, vomiting, bloating
- Rare but serious: Pancreatitis, gallbladder disease, thyroid tumors
Some studies suggest tirzepatide may have slightly better tolerability at maintenance doses, but both cause GI side effects during titration. If you cannot tolerate one, your provider may recommend trying the other. See our GLP-1 side effects guide.
Dosing comparison
| Week | Semaglutide | Tirzepatide |
|---|---|---|
| Weeks 1-4 | 0.25 mg | 2.5 mg |
| Weeks 5-8 | 0.5 mg | 5 mg |
| Weeks 9-12 | 1.0 mg | 7.5 mg |
| Weeks 13-16 | 1.7 mg | 10 mg |
| Week 17+ | 2.4 mg | 12.5-15 mg |
See our semaglutide dosage guide.
Which should you choose?
Choose tirzepatide if:
- You want maximum weight loss (22.5% vs 15%)
- You're looking for the best value per pound lost
- You haven't tried GLP-1 medications before
- You don't have specific reasons to prefer semaglutide
Choose semaglutide if:
- You have type 2 diabetes (Ozempic has a longer track record)
- Tirzepatide is not tolerated or causes too many side effects
- Your insurance covers semaglutide but not tirzepatide
- You prefer a medication with more long-term safety data
Ultimately, the best choice depends on your individual health profile, goals, and preferences. Your healthcare provider can help you decide.
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FAQ
Which is better for weight loss: semaglutide or tirzepatide?
Tirzepatide is more effective: 22.5% vs 15% weight loss. For a 200 lb person: 45 lbs vs 30 lbs. Tirzepatide is a dual GIP/GLP-1 agonist.
What is the difference between semaglutide and tirzepatide?
Semaglutide is a GLP-1 agonist (15% weight loss). Tirzepatide is a dual GIP/GLP-1 agonist (22.5% weight loss). Both are weekly injections with similar side effects.
Is tirzepatide more expensive than semaglutide?
Brand: tirzepatide ($1,059) is cheaper than semaglutide ($1,349). Compounded: similar price ($147-$399). Tirzepatide offers better value per pound lost.
Do they have the same side effects?
Yes, similar profiles: nausea, diarrhea, constipation, vomiting. Both have rare serious risks. Individual tolerance varies.
Can I switch from semaglutide to tirzepatide?
Yes. If not achieving adequate results or experiencing side effects, your provider may switch you. Start tirzepatide at lowest dose and titrate up.
How much more weight do you lose on tirzepatide?
~50% more. Semaglutide: 15% (30 lbs for 200 lb person). Tirzepatide: 22.5% (45 lbs). Difference: 7.5 percentage points or ~15 lbs.
Which has fewer side effects?
Similar profiles. Some studies suggest tirzepatide may be slightly better tolerated at maintenance doses. If you can't tolerate one, try the other.
Should I choose semaglutide or tirzepatide?
Tirzepatide for maximum weight loss. Semaglutide if you have diabetes, can't tolerate tirzepatide, or insurance prefers it. Consult your provider.
Related articles
- Semaglutide Weight Loss
- Tirzepatide Weight Loss
- Semaglutide Results
- Semaglutide Cost
- Tirzepatide Cost
- GLP-1 for Weight Loss
- Best Weight Loss Medication 2026
- GLP-1 Side Effects
Medical disclaimer: This content is for informational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any medication or weight-loss program.
Affiliate disclosure: This article contains affiliate links. We may earn a commission if you sign up through them, at no extra cost to you. This is a paid partnership. GLP-1 medications are prescription products requiring a physician consultation — not everyone qualifies, and results vary.
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Compounded semaglutide & tirzepatide. Online consultation with a US-licensed provider. No insurance needed.
Paid partnership · Prescription product · Not everyone qualifies · Results vary
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