CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 666 enrolled / 666 target
Drug / intervention
Niraparib +2 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04475939
NCT04475939Phase 3CompletedMonitor (9.8/mo)Completion was 16mo ago

A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Multicenter Study Comparing Niraparib Plus Pembrolizumab Versus Placebo Plus Pembrolizumab as Maintenance Therapy in Participants Whose Disease Has Remained Stable or Responded to First-Line Platinum -Based Chemotherapy With Pembrolizumab for Stage IIIB/IIIC or IV Non-Small Cell Lung Cancer (ZEAL-1L)

GlaxoSmithKline·interventional·Posted Jul 17, 2020·Updated Jun 18, 2026

In Brief

A Phase 3 clinical trial evaluating Niraparib, Pembrolizumab, and 1 other intervention for Lung Cancer, Non-Small Cell. Completed, enrolled 666 participants across 188 sites in 27 countries.

Signals

Enrolling slower than its timeline implies

Detailed Summary

This is a multicenter, randomized, double-blind, placebo-controlled study of niraparib plus pembrolizumab versus placebo plus pembrolizumab as maintenance therapy in participants with advanced or metastatic non-small cell lung cancer (NSCLC) who have achieved stable disease (SD), partial response (PR), or complete response (CR) following completion of standard of care first-line (SoC 1L) platinum-based induction chemotherapy with pembrolizumab. The primary hypotheses are: participants with confirmed diagnosis of NSCLC could benefit from niraparib plus pembrolizumab versus placebo plus pembrolizumab with respect to Progression-free survival (PFS) and Overall survival (OS).

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesArgentina, Australia, Belgium, Brazil, Bulgaria, Chile, Colombia, France, Germany, Greece, Hungary, Ireland, Italy, Mexico, Netherlands, Norway, Peru, Poland, Romania, Russia, South Korea, Spain, Sweden, Switzerland, Turkey (Türkiye), United Kingdom, United States
Collaborators--

Timeline

Phase 3CompletedFinished
202120222023202420252026
First PostedJul 17, 2020
Enrollment StartOct 26, 2020
Primary CompletionFeb 26, 2025
Study CompletionMar 23, 2026
TodayJul 2, 2026
Enrollment to primary: 4.3 yearsPosted 6.0 years ago

Arms & Interventions

Participants receiving niraparib plus pembrolizumabexperimental

Eligible participants will receive niraparib along with pembrolizumab.

Drug: NiraparibBiological: Pembrolizumab
Participants receiving placebo plus pembrolizumabplacebo_comparator

Eligible participants will receive matching placebo along with pembrolizumab.

Biological: PembrolizumabDrug: Placebo

Interventions

Niraparibdrug

Niraparib will be administered.

Pembrolizumabbiological

Pembrolizumab will be administered

Placebodrug

Matching placebo will be administered