Merck Provides Update on Phase 3 KeyVibe-008 Trial Evaluating an Investigational Fixed-Dose Combination of Vibostolimab and Pembrolizumab in Patients With Extensive-Stage Small Cell Lung Cancer

Merck discontinues Phase 3 KeyVibe-008 trial evaluating a fixed-dose combination of vibostolimab and pembrolizumab in extensive-stage small cell lung cancer (ES-SCLC) patients due to meeting pre-specified futility criteria for overall survival (OS). Patients in the combination arm experienced higher rates of adverse events (AEs) and immune-related AEs compared to the control arm. Ongoing comprehensive analysis and further clinical development program expansions are noted.