Jazz Pharmaceuticals (JAZZ) Soars on Breakthrough Ziihera Phase 3 Results in Gastroesophageal Cancer – Key Updates for 17 November 2025
Jazz Pharmaceuticals plc is in the spotlight today after announcing positive Phase 3 data for its cancer drug Ziihera® in a large global trial for HER2‑positive gastroesophageal adenocarcinoma. The news has triggered sharp pre‑market moves in Jazz’s share price and its partners’ stocks, and could reshape the treatment landscape for a difficult‑to‑treat cancer. PR Newswire+1