Tirzepatide and semaglutide are both injectable medications used for weight loss and type 2 diabetes management, but they differ in their mechanisms of action and effectiveness. Here’s a comparison of the two drugs:
Mechanism of Action
Tirzepatide:
- Dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist
- Activates both GIP and GLP-1 receptors
Semaglutide:
- Selective GLP-1 receptor agonist
- Activates only GLP-1 receptors
Effectiveness for Weight Loss
Tirzepatide:
- Associated with greater weight loss compared to semaglutide
- In a study of adults with overweight or obesity:
- Patients were 1.76 times more likely to achieve ≥5% weight loss
- 2.54 times more likely to achieve ≥10% weight loss
- 3.24 times more likely to achieve ≥15% weight loss compared to semaglutide
Semaglutide:
- Effective for weight loss, but generally less so than tirzepatide
- Approved for chronic weight management in adults with obesity or overweight with at least one weight-related condition
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