Retatrutide vs Cagrilintide
Comprehensive side-by-side comparison of mechanisms, dosing, side effects, and research
Also: LY3437943, Triple G
A triple agonist targeting GLP-1, GIP, and glucagon receptors. Phase 3 trials show up to 28.7% weight loss (71 lbs average), the highest of any obesity drug. Expected FDA approval late 2026 to early 2027.
Also: AM833, NN9838
A long-acting amylin analog developed by Novo Nordisk for obesity treatment. Works through a different mechanism than GLP-1 agonists, targeting amylin receptors in the brain to reduce appetite and slow gastric emptying. Shows enhanced weight loss when combined with semaglutide (CagriSema).
Key Comparison Insights
- Both peptides belong to the Weight Loss category, suggesting similar primary applications.
Detailed Comparison
| Attribute | Retatrutide | Cagrilintide |
|---|---|---|
| Category | Weight Loss | Weight Loss |
| FDA Status | Not FDA Approved | Not FDA Approved |
| Clinical Status | Pre I II III IV FDA | Pre I II III IV FDA |
| Mechanism of Action | Retatrutide activates three receptors: GLP-1 for appetite suppression and glucose control, GIP for enhanced insulin response and metabolic effects, and glucagon for increased energy expenditure and fat oxidation. The triple mechanism provides synergistic effects. | Cagrilintide mimics amylin, a hormone co-secreted with insulin from pancreatic beta cells. It activates amylin and calcitonin receptors in the area postrema and nucleus tractus solitarius of the brainstem, enhancing satiety signaling. Unlike GLP-1 agonists, it works through homeostatic and hedonic appetite centers, reducing hunger and promoting earlier meal termination. Also slows gastric emptying to prolong fullness. |
| Common Dosing | 4-12 mg weekly Once weekly, same day each week | 2.4 mg weekly Once weekly |
| Administration | Subcutaneous injection weekly | Subcutaneous injection once weekly |
| Typical Duration | Long-term use expected | Long-term / chronic use expected |
| Best Time to Take | Morning, same day each week | Any consistent time weekly |
Possible Side Effects May vary by individual |
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| Research Summary | Phase 3 TRIUMPH-4 trial (Dec 2025) showed 28.7% weight loss at 68 weeks, with average loss of 71 lbs. Also showed significant osteoarthritis pain relief, reduced cardiovascular risk markers, and 14 mmHg blood pressure reduction. Seven more Phase 3 readouts expected in 2026. NDA submission expected late 2025/early 2026. | REDEFINE 1 Phase 3 trial showed 11.8% weight loss with cagrilintide monotherapy vs 2.3% placebo over 68 weeks. Combined with semaglutide (CagriSema), average weight loss reached 20.4% vs 3.0% placebo. 60% of CagriSema participants achieved ≥20% weight loss, and 23% lost ≥30%. This represents some of the most significant weight loss results seen with any anti-obesity medication. |
Frequently Asked Questions: Retatrutide vs Cagrilintide
What is the difference between Retatrutide and Cagrilintide?
Retatrutide is a weight loss peptide that a triple agonist targeting glp-1, gip, and glucagon receptors. phase 3 trials show up to 28.7% weight loss (71 lbs average), the highest of any obesity drug. expected fda approval late 2026 to early 2027. Cagrilintide is a weight loss peptide that a long-acting amylin analog developed by novo nordisk for obesity treatment. works through a different mechanism than glp-1 agonists, targeting amylin receptors in the brain to reduce appetite and slow gastric emptying. shows enhanced weight loss when combined with semaglutide (cagrisema). The main differences lie in their mechanisms of action and clinical applications.
Which is better, Retatrutide or Cagrilintide?
Neither is universally "better" - the choice depends on your specific goals. Retatrutide is typically used for weight loss purposes, while Cagrilintide is used for weight loss. Always consult with a healthcare provider to determine which may be appropriate for your situation.
Can Retatrutide and Cagrilintide be used together?
Some peptide protocols combine multiple compounds for synergistic effects. However, using Retatrutide and Cagrilintide together should only be considered under medical supervision, as both compounds have their own side effect profiles and potential interactions. Research on their combined use may be limited.
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Educational Information Only
This comparison of Retatrutide and Cagrilintide is for educational purposes only. Neither this comparison nor any information on this site constitutes medical advice. Always consult with qualified healthcare providers before making decisions about peptides or other substances.