The White House said Friday that President Donald Trump is "fatigued but in good spirits" and shared information about his treatment following his coronavirus diagnosis.
Trump's physician, Dr. Sean Conley, said in a memo shared by White House officials that the president "as a precautionary measure" has "received a single 8 gram dose of Regeneron's polyclonal antibody cocktail."
"He completed the infusion without incident," Conley wrote.
Shortly after the memo was released, the White House said President Donald Trump was being taken to Walter Reed Medical Center "out of an abundance of caution."
Regeneron's experimental drug cocktail has yet to be approved for wider use. Results shared by the pharma giant just this week showed that some non-hospitalized Covid-19 patients who took the two-antibody treatment saw reduced viral levels and improved symptoms.
Regeneron confirmed in a statement to CNBC that it provided the dose to the president in response to a "compassionate use" request from Trump's doctors. That term refers to a way patients can access experimental drugs outside of clinical trials.
Trump has also been taking zinc, vitamin D, melatonin, a daily aspirin and the histamine-blocker famotidine, Conley said in the memo.
"As of this afternoon the President remains fatigued but in good spirits. He's being evaluated by a team of experts, and together we'll be making recommendations to the President and First Lady in regards to next best steps," the physician said.
Conley's memo added that first lady Melania Trump, who also tested positive for Covid-19, "remains well with only a mild cough and headache."
"The remainder of the First Family are well and tested negative" for the virus, Conley said.
The president announced his diagnosis on Twitter early Friday morning. The prolific tweeter has since stayed off the social media platform and out of sight, with White House officials providing few updates about his health throughout the day.
White House press secretary Kayleigh McEnany, who shared Conley's latest memo, said in an earlier interview that the president is experiencing "mild" symptoms and that he remains "hard at work."
NBC News, citing three people familiar with his condition, reported Friday afternoon that Trump has a low-grade fever.
The diagnosis comes less than five weeks before Trump faces a tough reelection fight against Democratic rival Joe Biden, who has hammered the president for failing to take the coronavirus pandemic seriously.
Trump's reelection campaign said that it will either temporarily postpone his previously scheduled events or reconfigure them to be held virtually. Biden, meanwhile, said he tested negative for Covid-19 and continued his campaign Friday, traveling to Grand Rapids, Michigan, to deliver a speech.
-- CNBC's Berkeley Lovelace, Meg Tirrell and Kevin Stankiewicz contributed to this report.