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Clinical Trial Summary

The purpose of this study is to assess the efficacy and safety of the combination of pembrolizumab (MK-3475) and docetaxel in the treatment of men with metastatic castration-resistant prostate cancer (mCRPC) who have not received chemotherapy for mCRPC but have progressed on or are intolerant to Next Generation Hormonal Agent (NHA). There are two primary study hypotheses. Hypothesis 1: The combination of pembrolizumab plus docetaxel plus prednisone is superior to placebo plus docetaxel plus prednisone with respect to Overall Survival (OS). Hypothesis 2: The combination of pembrolizumab plus docetaxel plus prednisone is superior to placebo plus docetaxel plus prednisone with respect to Radiographic Progression-free Survival (rPFS) per Prostate Cancer Working Group (PCWG)-modified Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as assessed by blinded independent central review.


Clinical Trial Description

With Amendment 6 (effective date: 29-Sep-2022), all participants will be unblinded and placebo treatment will be stopping. Participants who are deemed to be deriving clinical benefit from treatment may continue at the discretion of the investigator. The global study for MK-3475-921 enrolled 1030 participants. Of the 1030 total participants enrolled in the global study, 21 were also enrolled in the China extension study for MK-3475-921 (NCT04907227). ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03834506
Study type Interventional
Source Merck Sharp & Dohme LLC
Contact
Status Completed
Phase Phase 3
Start date May 2, 2019
Completion date July 18, 2023

See also
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