Keytruda Full Approval for Gastroesophageal Cancer

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FDA has granted Merck traditional approval for Keytruda (pembrolizumab) for use in combination with trastuzumab and chemotherapy for the first-line treatment of adults with locally advanced unresectable or metastatic HER2-positive gastric or gastroesophageal junction adenocarcinoma whose tumors express PD-L1 (a combined positive score of 1 or higher). The decision follows the accelerated approval Keytruda received in May 2021 for the same indication, which was based on interim data from the KEYNOTE-811 trial.

 FDA’s full approval is based on data from the KEYNOTE-811 trial (NCT03615326) that demonstrated a significant survival advantage for patients receiving Keytruda, according to an FDA release. In the targeted PD-L1-expressing population, median progression-free survival was 10.9 months for the Keytruda group compared to 7.3 months for the placebo group, it says. Median overall survival was 20.1 months in the Keytruda group versus 15.7 months in the placebo group. Regarding Keytruda’s safety profile, it was consistent with previously known adverse reactions, FDA says.

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