These are the two most discussed medications in our community. Let’s compare them.
Mechanism of Action
Semaglutide
- GLP-1 receptor agonist only
- Mimics one incretin hormone
- FDA approved since 2017 (Ozempic)
Tirzepatide
- Dual GIP/GLP-1 receptor agonist
- Mimics two incretin hormones
- FDA approved 2022 (Mounjaro)
Efficacy Comparison
Based on clinical trials:
| Measure | Semaglutide (2.4mg) | Tirzepatide (15mg) |
|---|---|---|
| Avg Weight Loss | ~15% | ~20%+ |
| A1C Reduction | Significant | Significant |
| Study Length | 68 weeks | 72 weeks |
Results vary significantly by individual
Dosing Comparison
Semaglutide (Wegovy)
- 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
- Weekly injections
- Titration over ~16-20 weeks
Tirzepatide (Zepbound)
- 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- Weekly injections
- Titration over ~20-24 weeks
Side Effects
Both share similar GI side effects:
- Nausea
- Vomiting
- Diarrhea
- Constipation
Some users report tirzepatide has more GI effects initially.
Availability and Cost
- Both face supply challenges
- Insurance coverage varies
- Cash prices are high
- Compounded versions exist (when on shortage list)
Which is Right?
Factors to discuss with your provider:
- Your medical history
- Diabetes status
- Insurance coverage
- Side effect tolerance
- Treatment goals
Always work with a healthcare provider for these decisions.
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