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A Phase 3 Randomized, Double-Blind, Placebo-controlled Trial of Pembrolizumab (MK-3475/SCH900475) in Combination With Etoposide/Platinum (Cisplatin or Carboplatin) for the First-line Treatment of Subjects With Extensive Stage Small Cell Lung Cancer
The purpose of this study is to assess the safety and efficacy of pembrolizumab plus standard of care (SOC) chemotherapy (etoposide/platinum [EP]) in participants with newly diagnosed extensive stage small cell lung cancer (ES-SCLC) who have not previously received systemic therapy for this malignancy.
The primary study hypotheses are that pembrolizumab+EP prolongs Progression-free Survival (PFS) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 by blinded independent central review (BICR) and Overall Survival (OS) compared with placebo+EP in adult participants with ES-SCLC. Participants will be randomized into one of two arms. In the experimental arm, participants receive pembrolizumab 200 mg intravenously (IV) Day 1 PLUS etoposide 100 mg/m^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum chemotherapy on Day 1. In the comparator arm, participants receive placebo (normal saline solution) IV on Day 1 PLUS etoposide 100 mg/m^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum chemotherapy on Day 1.