In the pivotal Phase 3 trial of patients regardless of tumor PD-L1 expression status, Keytruda in combination with chemotherapy (carboplatin and either paclitaxel or nab-paclitaxel) significantly improved overall survival, reducing the risk of death by 36% compared to chemotherapy alone (HR=0.64 [95% CI, 0.49, 0.85]; p=0.0017).
This approval marks the first time an anti-PD-1 regimen has been approved for the first-line treatment of squamous NSCLC regardless of tumor PD-L1 expression status.
Immune-mediated adverse reactions, which may be severe or fatal, can occur with Keytruda, including pneumonitis, colitis, hepatitis, endocrinopathies, nephritis, severe skin reactions, solid organ transplant rejection, and complications of allogeneic hematopoietic stem cell transplantation.
Based on the severity of the adverse reaction, Keytruda should be withheld or discontinued and corticosteroids administered if appropriate.
Keytruda can also cause severe or life-threatening infusion-related reactions. Based on its mechanism of action, Keytruda can cause fetal harm when administered to a pregnant woman.
Keytruda is the first anti-PD-1 approved in the first-line setting as both combination and monotherapy in certain patients with metastatic NSCLC (see Keytruda indications below).
With this approval, all appropriate patients with metastatic squamous NSCLC and all appropriate patients with metastatic nonsquamous NSCLC and no EGFR or ALK genomic tumor aberrations are now eligible for a Keytruda-based regimen as their first-line treatment option.
The approval was based on data from KEYNOTE-407, a randomized, double-blind, multicenter, placebo-controlled study. The key eligibility criteria for this study were metastatic squamous NSCLC, regardless of tumor PD-L1 expression status, and no prior systemic treatment for metastatic disease.
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