InvestmentsTop Global NewsMarketsReal Estate Merck quarterly profit rises nearly 55per cent as key drug sales rebound By financialnews_rlv83x - October 27, 2020 0 51 Merck & Co Inc on Tuesday reported a 54.7per cent rise in third-quarter profit, helped by strong sales of blockbuster cancer drug Keytruda and rebound in sales of its key drugs.