** Shares in European healthcare companies fall after U.S. President Donald Trump said tariffs for the sector would be announced soon

** Europe's benchmark STOXX 600 Healthcare index .SXDP falls 3.9%, leading sectoral losses on the broader STOXX 600 .STOXX that falls 2.8%

** Among single stocks, Switzerland's Novartis NOVN.S and Roche ROG.S fall 5.4% and 5.2%, respectively

** France's Sanofi SASY.PA drops 4.9%, Valneva VLS.PA is down 2.9%

** Belgium's Argenx ARGX.BR and UCB UCB.BR are down between 4.5% and 5.9%

** Germany's Bayer BAYGn.DE and Merck MRCG.DE fall around 3.5%

** AstraZeneca AZN.L, Bavarian Nordic BAVA.CO and GSK GSK.L are down 2.2% to 4.7%

(Reporting by Isabel Demetz and Alessandro Parodi)