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Is retatrutide a drug?

Yes, but an investigational one. A trial report says it is currently under investigation for obesity, diabetes and other conditions.

GLP-1 / GIP / glucagon triple agonistUpdated

Short answer

Yes, but an investigational one. A trial report says it is currently under investigation for obesity, diabetes and other conditions.[1]

An earlier trial paper likewise says it is in development for obesity.[2]

The trial registry classes retatrutide as a drug intervention, with placebo as the comparator.[3]

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More on Retatrutide

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Sources

  1. 1Retatrutide in adults with obesity and type 2 diabetes (TRIUMPH-2): a double-blind, parallel-group, randomised, placebo-controlled, phase 3 trial.Lancet (London, England) · 2026PMID 42810372Accessed 2 Oct 2026
  2. 2Perceived benefits of treatment for obesity with retatrutide: A qualitative study of patients in a phase 2 clinical trial.Obesity pillars · 2025PMID 41216380Accessed 2 Oct 2026
  3. 3A Master Protocol to Investigate the Efficacy and Safety of LY3437943 Once Weekly in Participants Without Type 2 Diabetes Who Have Obesity or Overweight: A Randomized, Double-Blind, Placebo-Controlled Trial (TRIUMPH-1)ClinicalTrials.gov (U.S. National Library of Medicine) · 2023clinicaltrials.govAccessed 2 Oct 2026

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