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New Phase 3b data on Lilly's Taltz (ixekizumab) and Zepbound (tirzepatide) used together showed improved and durable efficacy at one year in adults with psoriatic disease and obesity

$LLYPress releaseAug 31, 2026, 7:00 AM ETRead the release

Lilly reported 52-week results from the Phase 3b TOGETHER-PsO and TOGETHER-PsA trials, demonstrating that concomitant use of Taltz and Zepbound maintained or further improved disease activity compared to Taltz alone. In the psoriasis trial, 40.5% of patients on the combination achieved complete skin clearance (PASI 100) at Week 52 versus 29.1% for monotherapy, while in the psoriatic arthritis trial, 43.7% achieved ACR50 versus 15.7% for monotherapy.

Key figures

Drug Name
Taltz (ixekizumab), Zepbound (tirzepatide)
Phase Of Trial
Phase 3b
Acr50 taltz zepbound
43.7%
Acr50 taltz monotherapy
15.7%
Pasi 100 taltz zepbound
40.5%
Pasi 100 taltz monotherapy
29.1%

AI analysis

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    LLY: New Phase 3b data on Lilly's Taltz (ixekizumab) and Zepbound (tirzepatide) used together showed improved and durable efficacy at one year in adults with psoriatic disease and obesity — AI Analysis | Signal8