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NCT04305054Phase 1Phase 2Completed

Substudy 02B: Safety and Efficacy of Pembrolizumab in Combination With Investigational Agents or Pembrolizumab Alone in Participants With First Line (1L) Advanced Melanoma (MK-3475-02B/KEYMAKER-U02)

Study Summary

Substudy 02B is part of a larger research study where researchers are looking for new ways to treat advanced melanoma that has not been treated before. The larger study is the umbrella study. Researchers want to know if adding other treatments to pembrolizumab can treat advanced melanoma. The goals of this study are to learn: * About the safety and how well people tolerate pembrolizumab given with other treatments * How many people have melanoma that responds (gets smaller or goes away) to treatment

Conditions
View on ClinicalTrials.gov ↗
Study Details
Enrollment335 participants
Primary Completion2026-05-18
Lead SponsorMerck Sharp & Dohme LLC
Data Retrieved2026-10-14
What This Trial Means for Biotech Investors
Trial Phase Context

Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.

Phase 2 trials begin testing efficacy in a larger patient group (100–300). This is often where biotech binary events occur — positive Phase 2 data can significantly advance a company's pipeline narrative, while failures can be terminal for a program.

Status & Expected Data

This trial has completed. Results may be available via ClinicalTrials.gov or peer-reviewed publications.

Primary completion: 2026-05-18
Enrolled: 335 participants
Sponsor Catalyst Profile

Merck & Co (MRK) is the sponsoring company for this trial. BiotechSign currently grades this company C (52/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.

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