Enicepatide, formerly known as CT-388, is the once-weekly subcutaneous GLP-1/GIP dual receptor agonist Roche acquired through its Carmot Therapeutics deal and now positions at the center of its obesity strategy. The drug shares its mechanism with Lilly's tirzepatide and is in the same incretin-agonist class as a number of mid-stage competitors.
The near-term plan is combination. Roche announced that enicepatide will be paired with the amylin analog petrelintide (licensed from Zealand Pharma) in a fixed-dose Phase 2 combination starting mid-2026, the same strategy that delivered Novo's CagriSema. Phase 2 CT388-103 data for enicepatide and the petrelintide ZUPREME-1 readout were the two anchors of the Roche/Genentech ADA 2026 investor event on June 8. Roche executives have projected $9 billion in peak annual sales for the combined obesity pipeline.
Stories here cover enicepatide trial readouts and Roche's broader incretin and amylin strategy. See #roche, #petrelintide, and #glp-1-gip for adjacent threads.
Genentech presented Phase 2 CT388-103 data for enicepatide, the once-weekly GLP-1/GIP dual agonist, at the Roche investor event Monday June 8. The 48-week study produced 22.5% placebo-adjusted weight loss in adults with overweight or obesity, with 26% of participants losing more than 30% of body weight and almost 40% reaching at least 25%. Both enicepatide and petrelintide advance into Phase 3, and the planned Phase 2 multi-arm fixed-dose combination of the two starts mid-2026.
Genentech confirmed at its Monday investor event that the planned Phase 2 multi-arm fixed-dose combination of petrelintide (amylin analog) and enicepatide (GLP-1/GIP) starts mid-2026. The setup mirrors Novo's CagriSema and Lilly's Mounjaro-plus-amylin work, with Roche aiming for the same dual-mechanism economics that produced REIMAGINE 2's head-to-head win this week. Roche projected $9 billion in peak annual sales for the combined obesity pipeline at its Q1 print.
Genentech, Roche's US arm, will present detailed Phase 2 ZUPREME-1 data for the amylin analog petrelintide and Phase 2 CT388-103 data for the GLP-1/GIP agonist enicepatide as late-breakers at ADA 2026, with a June 8 virtual investor event. The Roche obesity package combines the two peptides as a planned fixed-dose Phase 2 combination later this year, and the company has projected $9 billion in peak annual sales for the combined pipeline.
On the April 23 Q1 call and follow-up coverage, Roche clarified that its two Phase 3 enicepatide (CT-388) obesity trials — ENITH 1 and ENITH 2 — were both successfully initiated in Q1, with the dual GLP-1/GIP agonist on track to compete in the next-wave Phase 3 obesity readouts. Phase 2 reported 22.5% placebo-adjusted weight loss for enicepatide. Roche also confirmed the petrelintide+enicepatide fixed-dose combination Phase 2 will dose its first patient around mid-2026, pairing the Zealand-derived amylin analog (placebo-like tolerability, 10.7% mean weight loss in ZUPREME-1 at week 42) with Roche's stronger GLP-1/GIP backbone. Additional Phase 2 readouts for oral GLP-1 CT-996 are guided before year-end 2026.
Roche reported Q1 2026 sales up 6% at constant exchange rates and used the earnings call to re-anchor its obesity strategy. Executives project $9 billion in peak annual sales from the emerging breast cancer pill plus four obesity candidates. Lead asset petrelintide (licensed from Zealand Pharma, ZUPREME-1 Phase 2 showed up to 10.7% weight loss with placebo-like tolerability) is positioned at a differentiated patient segment. CEO Schinecker said Roche is not investing in the first generation of obesity drugs, but the next — with petrelintide and CT-388 (enicepatide) data headed for ADA 2026.