The stock of Danish pharmaceutical giant Novo Nordisk was trading three percent lower on Thursday morning when the Copenhagen Stock Exchange opened for business. The Bagsværd-based firm is the world's largest maker of diabetes treatments.
Shares in Lundbeck, which specialises in psychiatric and neurological disorders, were also down three percent, while Danish firms Bavarian Nordic and Neurosearch dropped 2.5 percent, news agency Ritzau reported.
Trump said at his press conference in New York that he would make the pharmaceutical industry bid for government contracts.
“There's very little bidding on drugs. We're the largest buyer of drugs in the world. And yet we don't bid properly. We're going to start bidding,” Trump said.
US law currently does not allow federal insurance programme Medicare to negotiate drug prices, essentially allowing the pharmaceutical industry to set their own drug prices.
“They're getting away with murder,” Trump said about the industry. “Pharma has a lot of lobbyists and a lot of power and there is very little bidding.”