October 20, 2023 – KEYTRUDA® (pembrolizumab) Plus Trastuzumab and Chemotherapy Significantly Improved Progression-Free Survival (PFS) Versus Trastuzumab and Chemotherapy in First-Line HER2-Positive Advanced Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma

RAHWAY, N.J.–(BUSINESS WIRE)–Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced results from the Phase 3 KEYNOTE-811 trial evaluating KEYTRUDA, Merck’s anti-PD-1 therapy, in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, for the first-line treatment of patients with human epidermal growth factor receptor 2 (HER2)-positive locally advanced unresectable or metastatic gastric or gastroesophageal junction (GEJ) adenocarcinoma. These data are being presented today during a proffered paper session at the European Society for Medical Oncology (ESMO) Congress 2023 (abstract #1511O) and are being discussed with regulatory authorities worldwide.

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