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RecruitingLast updated: 17 April 2026

Codebreak 202: This study is comparing the effectiveness of targeted therapy versus immunotherapy when given in addition to platinum chemotherapy in people with advanced non-small cell lung cancer who have not had prior treatment for their advanced diseaseA Phase 3, Multicenter, Randomized, Open-label Study Evaluating Efficacy of Sotorasib Platinum Doublet Combination Versus Pembrolizumab Platinum Doublet Combination as a Front-Line Therapy in Subjects With Stage IV or Advanced Stage IIIB/C Nonsquamous Non-Small Cell Lung Cancers, Negative for PD-L1, and Positive for KRAS p.G12C

Trial purpose

Medical clipboardCancer treatment

Tumor type

Lung Cancers Lung cancer

Age

People18 - 100

Trial acronym

Codebreak 202

Clinical summary

Summary

You may be eligible for this study if you have non-squamous stage IV or advanced stage IIIB or IIIC non-small cell lung cancer with a KRAS p. G12C mutation, and negative PD-L1 expression. You should not have received any prior systemic anti-cancer treatment for your advanced or metastatic disease. Prior treatment for your cancer in an earlier stage is permitted.

Eligible participants will be randomly allocated (by chance) to one of two treatment arms. 

In Arm 1 (Experimental), participants will receive targeted therapy (called sotorasib) in combination with platinum chemotherapy (carboplatin and pemetrexed). 

In Arm 2 (Active Comparator), participants will receive immunotherapy (called pembrolizumab) in combination with platinum chemotherapy (carboplatin and pemetrexed). 

Conditions

This trial is treating people with non-squamous non-small cell lung cancer with KRAS p.G12c mutation and negative PD-L1 expression

Eligibility

Inclusion

  • Histologically or cytologically confirmed diagnosis of nonsquamous stage IV or advanced Stage IIIB or IIIC NSCLC with KRAS p. G12C mutation and negative for PD-L1 expression by central testing or local laboratory testing confirmed through central testing
  • No history of systemic anticancer therapy in metastatic/non-curable settings
  • Eastern Cooperative Oncology Group (ECOG) ≤ 1

Exclusion

  • Mixed histology NSCLC with either small-cell or large-cell neuroendocrine cell component or predominant squamous cell histology
  • Participants with tumors known to harbor molecular alterations for which targeted therapy is locally approved
  • Symptomatic (treated or untreated) brain metastases
  • Gastrointestinal (GI) tract disease causing the inability to take oral medication
  • Myocardial infarction within 6 months of randomization, unstable arrhythmias, or unstable angina
  • Prior therapy with a KRAS G12C inhibitor

Inclusion

  • Your cancer has spread to other parts of the body (metastatic) or has grown into nearby parts of the body (locally advanced).
  • You are able to swallow medication by mouth.

Exclusion

  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

Participating hospitals

Recruiting hospitals

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov, EU Clinical Trials Register *. View further details about this trial on the registry via the links below:

Trial sponsor

Amgen

Scientific Title

A Phase 3, Multicenter, Randomized, Open-label Study Evaluating Efficacy of Sotorasib Platinum Doublet Combination Versus Pembrolizumab Platinum Doublet Combination as a Front-Line Therapy in Subjects With Stage IV or Advanced Stage IIIB/C Nonsquamous Non-Small Cell Lung Cancers, Negative for PD-L1, and Positive for KRAS p.G12C

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