shares tumble

      Shares in British pharmaceutical group GSK tumbled Monday after a US court paved the way for legal action by tens of thousands of patients who allege the heartburn drug Zantac caused cancer. The over-the-counter treatment, known also by its non-commercial name ranitidine, was manufactured by several rivals including the French group Sanofi and US drugmaker Pfizer before it was withdrawn in 2019. "GSK disagrees with the ruling […]