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AstraZeneca’s stomach cancer drug clears bar for extending overall survival in late-stage study

The drug cut the risk of death by 53% and showed fewer serious side effects, though its progression-free survival goal fell short.

  • On Sunday, AstraZeneca reported Phase III results showing its cancer drug sonesitatug vedotin cut the likelihood of death by 42% among previously treated patients with advanced gastric cancer.
  • In the CLARITY-Gastric01 trial, researchers compared Sone-Ve against the investigator's choice of chemotherapy for patients whose tumors expressed the Claudin 18.2 protein on at least 25% of cells.
  • Median overall survival reached 10.0 months with Sone-Ve versus 5.0 months on chemotherapy, representing a 53% reduction in the risk of death for patients in third-line or later settings.
  • Susan Galbraith, executive vice president of oncology haematology research and development at AstraZeneca, called the 5-month improvement "very clinically significant" and confirmed the company is preparing to file for regulatory approval.
  • AstraZeneca is testing the drug in the CLARITY-Gastric02 Phase III trial as a potential first-line treatment, although Sone-Ve missed its progression-free survival goal in the recent study.
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AstraZeneca reported that its experimental drug against stomach cancer reduced the risk of death in patients with advanced disease by 53%.

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Created the antibody-drug that works as a ?horse of Troy? against tumors. The innovative technology in precision oncology has proven to be...

·Rome, Italy
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stocktitan.net broke the news on Sunday, October 25, 2026.
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