Shares of European drugmakers Novo Nordisk NOVOb.CO, AstraZeneca AZN.L, Sanofi SASY.PA, GSK GSK.L, Novartis NOVN.S, Roche ROG.S, Merck KGaA MRCG.DE fall between 1% and 3% in early trading
Trump sent letters to CEOs of these cos to cut U.S. drug prices
European healthcare index .SXDP falls 1.34% to lowest since April, top drag on broader Pan-European STOXX 600 index .STOXX, which is down 0.9%
Novo, AstraZeneca, GSK among top losers on .SXDP
S&P Healthcare subindex .SPXHC, NYSE Arca Pharmaceutical index .DRG closed more than 2% lower on Thursday after Trump's announcement