Shares in Australian pharmaceutical firm QRxPharma have plummeted 80 per cent in a major shareholder revolt after the company failed to win regulatory approval for its painkiller drug, Moxduo, to be released in the United States.
QRxPharma shares are trading around 13¢, down from 70¢ on April 17 and 12.5 per cent below where they were at the start of this year.