US President Donald Trump said on Friday night that he stopped taking medications to combat coronavirus eight hours ago.

Iran Press/America: "Right now I'm medication free. I'm not taking any medications as of, you know, probably eight hours ago," Trump said in the interview.

Trump also said he had been tested again for the virus.

"I have been retested and I haven't even found out numbers or anything yet but I've been retested, and I know I'm at either the bottom of the scale or free," he said in an interview on Fox News.

He said he did not know when his next test would be, adding that it was "probably tomorrow... they test every couple of days."

Trump said the virus had sapped his energy levels, adding he "didn't feel very vital."

He also said he "didn't have a problem with breathing." His doctors have said he was put on supplemental oxygen at least twice, and the president later said that lung tests had shown "some congestion in there."

Trump said he did not know where he had contracted the virus, adding: "It's highly contagious. That's one thing you learn, this is a contagious disease."

Trump, eager to get back on the election campaign trail after being sidelined by a COVID-19 infection, will begin by giving remarks to supporters outdoors at the White House on Saturday and then hold a rally in Florida two days later.