Prices of 137 cancer drugs set to fall by up to 70% from Nov 9. Prices of 137 anti-cancer drugs are expected to fall by up to 70% after India's drug price regulator NPPA capped trade margins at 30%. The revised prices will take effect on November 9, and can be checked on NPPA website or Pharma Sahi Daam app. Retailers and hospitals must display updated prices, while drugmakers must maintain supplies to ensure availability.