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Retatrutide is investigational and not FDA-approved. Enter your email and ZIP and we'll notify you when its status changes — nationally and for your area. This list is informational; it is not a treatment queue and does not guarantee access.
Retatrutide is Eli Lilly's investigational once-weekly triple agonist (GIP, GLP-1 and glucagon receptors). Five Phase 3 trials have reported positive results, and Lilly plans to submit it to the FDA in Q1 2027. It is not FDA-approved, has no brand name or price, and cannot be prescribed outside clinical trials or Lilly's physician-requested expanded access program. Products sold online as "research" or compounded retatrutide are not legitimate retatrutide.
- Development
- Phase 3 complete
- FDA status
- Submission planned — Q1 2027 (Lilly guidance)
- Availability
- Not commercially available
- Access routes
- Clinical trials, or Lilly's expanded access program (physician must apply)
Next milestone: TRIUMPH-5 head-to-head vs tirzepatide results (Expected ~Dec 2026)
Sources: Lilly — What to know about retatrutide · Lilly — TRIUMPH-2/TRIUMPH-3 results · BioPharma Dive — FDA submission plans · STAT — Lilly expanded access (Aug 3, 2026) · FDA — Concerns with unapproved GLP-1 drugs