TRANSCEND-T2D-1 and the First-Line Question: What Retatrutide's Phase 3 Results Mean for Diabetes Care, Access & Equity

Steven Minh Phat Duong

No kyb4z_v2, SocArXiv from Center for Open Science

Abstract: The TRANSCEND-T2D-1 trial establishes retatrutide as the first triple agonist for type 2 diabetes. Over 40 weeks, 537 adults achieved placebo-subtracted HbA1c reductions of 0.88%–1.12% and 8.9%–12.7% (20–29 lbs) weight loss, exceeding tirzepatide's weight loss in SURPASS-1 and rivaling bariatric surgery. Yet retatrutide's efficacy comes with higher adverse events (discontinuation 2.5% overall, 5.1% for 12 mg vs. 0% placebo), a projected annual cost of $12,000, and a budget impact ICER estimates would exceed $880 million annually with <1% eligible patients treated. This creates a hidden equity mechanism: patients with paid sick leave can navigate dose escalation; those without cannot. Existing GLP-1 disparities forewarn. Non-Hispanic Blacks have 28% lower odds of GLP-1 prescription, and Black and Hispanic patients face lower out-of-pocket costs and lower fill rates. An unregulated gray market already flourishes: 15 pounds of retatrutide entered the U.S. between Jan–Apr 2026, with 14 hospitalizations reported. Three policy interventions, CMS Coverage with Evidence Development, FDA post-marketing diversity requirements, and state Medicaid VBP, could improve access if implemented before FDA approval, expected within 12-18 months. The next 18 months will determine whether this breakthrough succeeds or becomes a marker of who can afford the best care.

Date: 2026-06-24
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DOI: 10.31219/osf.io/kyb4z_v2

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