Preliminary
Retatrutide, a Triple Hormone Receptor Agonist, for Treatment of ObesityJastreboff AM, et al. N Engl J Med. 2026 Nov 5;395(18):1781-1793. Epub 2026 Sep 29. PMID 42814954. DOI 10.1056/NEJMoa2604169. NCT05929066.
TRIUMPH-1: phase 3, randomized, double-blind, 80-week trial. 2,339 adults with obesity without diabetes were assigned once-weekly retatrutide 4 mg, 9 mg, 12 mg, or placebo. Primary comparisons were 9 mg and 12 mg versus placebo. Mean weight change was −17.6%, −23.7%, and −25.0% versus −3.9% with placebo. In 574 participants with knee osteoarthritis, pain scores fell more than with placebo. In 243 with obstructive sleep apnea, apnea–hypopnea events fell more than with placebo. The most common adverse events were gastrointestinal. A published trial is not an approval.
- Who or what
- Adults with obesity without diabetes; subgroups with knee osteoarthritis or obstructive sleep apnea
- Sample
- 2,339 randomized; 574 with knee osteoarthritis; 243 with obstructive sleep apnea
- Comparator
- Placebo. Primary tests were 9 mg and 12 mg versus placebo.
- Endpoint
- Percent change in body weight; WOMAC pain in the osteoarthritis subgroup; apnea–hypopnea index in the sleep-apnea subgroup
- Limitations
- Online 29 Sep 2026; journal issue 5 Nov 2026. The 4 mg weight result is reported, but it was not a primary comparison. Investigational drug in the sponsor’s formulation. Results do not transfer to a research-catalog vial, and they are not an FDA approval.
- Year
- 2026