Semaglutide vs Tirzepatide: What's the Difference?
Two active ingredients dominate the compounded GLP-1 market. Here's how semaglutide and tirzepatide compare.
Semaglutide vs Tirzepatide: What's the Difference?
Two active ingredients dominate the compounded GLP-1 market: semaglutide and tirzepatide. Understanding the differences can help you have a more informed conversation with your healthcare provider.
Semaglutide
Semaglutide is the active ingredient in:
- Ozempic (FDA-approved for type 2 diabetes)
- Wegovy (FDA-approved for weight loss)
It works by mimicking GLP-1, a hormone that regulates appetite and blood sugar.
Tirzepatide
Tirzepatide is the active ingredient in:
- Mounjaro (FDA-approved for type 2 diabetes)
- Zepbound (FDA-approved for weight loss)
It is a dual agonist, meaning it mimics both GLP-1 and GIP (glucose-dependent insulinotropic polypeptide), another hormone involved in metabolism and blood sugar regulation.
Key Differences
| Feature | Semaglutide | Tirzepatide |
|---|---|---|
| Brand names | Wegovy, Ozempic | Zepbound, Mounjaro |
| Mechanism | GLP-1 agonist | GLP-1 + GIP agonist |
| Max dose (brand) | 2.4 mg | 15 mg |
| Typical starting dose | 0.25 mg | 2.5 mg |
What the Research Shows
Clinical trials for both medications have shown significant weight loss results:
- Wegovy (semaglutide): In clinical trials, participants lost an average of ~15% of body weight over 68 weeks
- Zepbound (tirzepatide): In clinical trials, participants lost an average of ~20-22% of body weight over 72 weeks
However, individual results vary significantly, and these trials were for the brand-name FDA-approved versions, not compounded products.
Which Is Right for You?
This is a decision only your healthcare provider can help you make. Factors include:
- Your medical history and current health conditions
- Other medications you're taking
- Your weight loss goals
- Potential side effects and your tolerance
- Cost and availability
- Whether you've tried one before
Some providers offer both and may switch you from one to the other based on your response.
Side Effects
Both medications can cause similar side effects, particularly gastrointestinal:
- Nausea
- Vomiting
- Diarrhea or constipation
- Decreased appetite
- Possible thyroid tumors (seen in animal studies)
This information is educational only. It is not medical advice and should not replace a consultation with a licensed healthcare professional. Always discuss the risks and benefits of any medication with your provider.
Medical Disclaimer
This content is for educational purposes only and is not medical advice. GLP-1 Primer does not recommend or endorse any specific medication, provider, or treatment. Always consult a licensed healthcare professional before making decisions about your health.
