Phase 3 timeline speculation — when does reta actually hit market

T
Joined 2026
39 posts
2/20/2026 · 5886 views

Lilly's SURPASS-style trials for reta (TRIUMPH program) have readouts rolling through 2025-2026. Primary obesity endpoint trial (TRIUMPH-4) was supposed to wrap this spring.

Based on the tirze timeline (phase 3 primary completion → FDA approval was ~18 months), naive math says reta approval window is late 2026 to mid 2027 for obesity indication. Diabetes indication likely trails by 6-12 months.

Curious what the lab/regulatory people here think. Lilly has capacity pressure from Zepbound still being supply-constrained — does that slow the reta launch even after approval?

15 Replies

C
Joined 2026
71 posts
2/21/2026

TRIUMPH-4 primary completion is listed as April 2025 on CT.gov last I checked. Data analysis plus NDA submission is usually 6-9 months post-completion. So NDA late 2025/early 2026, approval decision mid-to-late 2026 is plausible. Not late 2026 through mid 2027.

T
Joined 2026
39 posts
2/21/2026

@citation_required good catch, I was conservative. If NDA late 25 and priority review, mid-26 approval is realistic. I was baking in too much slack.

G
Joined 2026
32 posts
2/22/2026

Lilly's been building capacity aggressively in NC and IN. My read is they're planning for reta to launch without tirze being out of the supply hole — they're solving both in parallel. Whether it works is another question.

R
Joined 2026
26 posts
2/22/2026

Meanwhile the research chem channel has had reta available for 18 months already. Real question isn't 'when does it approve' but 'when does payer coverage happen.' Approval means nothing if it's $1500/mo cash.

T
Joined 2026
44 posts
2/22/2026

Zepbound pricing history says it'll be $1000-1200/mo list, maybe $550 with Lilly's direct program, and payer coverage takes 12-24 months after approval to meaningfully broaden. Plan accordingly.

Tirze cycle
  • Tirzepatide · 5 mg · weekly · sub-Q
S
Joined 2026
115 posts
2/23/2026

Worth noting — reta for obesity only (TRIUMPH-4) may hit first, diabetes indication second. The compounding pharmacy loophole that's alive for tirze right now will not be available for reta on launch because FDA closed that door in 2024.

M
Joined 2026
29 posts
2/24/2026

So practically speaking, if someone's on research chem reta right now, the economics of switching to pharma reta after approval are bad unless you have good insurance coverage. Planning for multi-year research chem continuity is the realistic move.

C
Joined 2026
19 posts
cagrisemaMember
2/26/2026

Don't forget Novo has cagrisema readouts in the same window. If cagrisema data is competitive, reta's pricing power is weaker on launch. Payers play them against each other.

H
Joined 2025
205 posts
hexaclinicContributor
2/27/2026

Lilly cares less about consumer pricing than you'd think — obesity indication for reta is a 10-year franchise play. They'll price for long-term payer contracts not short-term cash pay. Retail cash pay will be brutal for the first 2 years.

Q2 stack
  • CJC-1295 no DAC · 100 mcg · pre-bed · sub-Q
  • Ipamorelin · 200 mcg · pre-bed · sub-Q
  • BPC-157 · 500 mcg · 2x/day · sub-Q
P
Joined 2026
36 posts
3/1/2026

Question for the regulatory people — is there precedent for FDA requiring additional cardiovascular outcome trials (like what sema needed) before reta gets a broader label? GCG component is novel and I'd expect CV caution.

C
Joined 2026
71 posts
3/2/2026

@plateau_breaker FDA signaled they want CV outcomes data for the GCG arm specifically. That's TRIUMPH-OUTCOMES which isn't reading until 2028 earliest. Initial approval will likely have language limiting high-risk CV populations.

D
Joined 2025
119 posts
dr_doubtRegular
3/4/2026

All speculation downstream of this: if you're waiting for pharma reta before using it, you're waiting 2-4 years for reasonable access. Make your decisions with that in mind rather than assuming 'next year it'll be normal.'

T
Joined 2026
39 posts
3/6/2026

This thread is a better timeline picture than most industry reports I've read. Saving.

R
Joined 2025
22 posts
3/9/2026

Just wanted to say threads like this are why I'm here. Thanks all.

F
Joined 2026
30 posts
3/13/2026

If approval lands mid-26 I'll probably bridge with research chem until my insurance picks it up. Realistic 2028 before I'm paying pharma prices with coverage.

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