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Merck’s KEYTRUDA® (pembrolizumab) Plus Chemotherapy Significantly Improved Overall Survival Versus Chemotherapy Alone in Patients With HER2-Negative Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma Regardless of PD-L1 Expression

Published: 2023-02-16 17:30:00 ET
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In KEYNOTE-859, KEYTRUDA combined with chemotherapy also showed statistically significant improvements in progression-free survival and objective response rate, the trial’s key secondary endpoints, compared with chemotherapy alone

RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced results from the pivotal Phase 3 KEYNOTE-859 trial investigating KEYTRUDA, Merck’s anti-PD-1 therapy, in combination with fluoropyrimidine- and platinum-containing chemotherapy for the first-line treatment of patients with human epidermal growth factor receptor 2 (HER2)-negative locally advanced unresectable or metastatic gastric or gastroesophageal junction (GEJ) adenocarcinoma. After a median follow-up of 31.0 months (range, 15.3-46.3 months), KEYTRUDA in combination with chemotherapy significantly improved overall survival (OS), reducing the risk of death by 22% (HR=0.78 [95% CI, 0.70-0.87]; p