Amgen Announces New Interim Results from the Global Phase 3 Dellphi-304 Trial Showing Imdelltra® (Tarlatamab-Llle)

Published: 2025-06-02 09:05:28 ET AMGN

Published on 06/02/2025 at 09:05

Amgen announced new interim results from the global Phase 3 DeLLphi-304 trial showing IMDELLTRA® (tarlatamab-dlle) reduced the risk of death by 40% and significantly extended median overall survival (OS) by more than five months compared to standard-of-care (SOC) chemotherapy in patients with small cell lung cancer (SCLC) who progressed on or after one line of platinum-based chemotherapy (median OS: 13.6 vs 8.3 months; hazard ratio [HR], 0.60; 95% confidence interval [CI]: 0.47, 0.77; P < 0.001). At a median follow-up of 11.2 months for IMDELLTRA and 11.7 months for the control arm, data from the global Phase 3 Dellphi-304 clinical trial showed a median OS of 13.6 months with IMDELLTRA compared to 8.3 months with local SOC chemotherapy (HR, 0.60; 95% CI: 0.47, 0".001). DeLLphi-304 is a global Phase 3, randomized, controlled, open-label clinical trial evaluating the efficacy and safety of IMDELLTRA as a treatment for patients living with SCLC who progressed on or after a single line of platinum-based chemotherapy.

Five hundred and nine patients were randomized to receive either IMDELLTRA or local SOC chemotherapy (topotecan in all countries except Japan; lurbinectedin in the U.S., Canada, Australia, Singapore, Korea; and amrubicin in Japan). The primary outcome measure of the trial is OS. Key secondary outcome measures include PFS and PROs including disease-related symptoms, physical function and quality of life.

DeLLphi-304 is intended to serve as the confirmatory trial for IMDELLTRA's accelerated approval for the treatment of adult patients with extensive-stage small cell lung cancer (ES-SCLC) with disease progression on or after platinum-based chemotherapy.