An anonymous reader quotes Reuters:

British scientists halted a major drug trial on Friday after it found that the anti-malarial hydroxychloroquine, touted by U.S. President Donald Trump as a potential “game changer” in the pandemic, was “useless” at treating COVID-19 patients. “This is not a treatment for COVID-19. It doesn’t work,” Martin Landray, an Oxford University professor who is co-leading the RECOVERY trial, told reporters.

“This result should change medical practice worldwide. We can now stop using a drug that is useless…”

Landray, a professor of medicine and epidemiology at Oxford University, noted the “huge speculation” about the drug as a treatment for COVID-19 but said there had been until now “an absence of reliable information from large randomised trials”. He said the preliminary results from RECOVERY, which was a randomised trial, were now quite clear: hydroxychloroquine does not reduce the risk of death among hospitalised patients with COVID-19.

“If you’re admitted to hospital, don’t take hydroxychloroquine,” he said.

The trial involved over 11,000 patients in a randomized trial begun in March.
The article ends by quoting Parastou Donyai, director of Pharmacy Practice at the University of Reading in England, who describes the announcement as “welcome relief to thousands of scientists, doctors and academics who have been crying out for proper proof of whether hydroxychloroquine works in COVID-19 or not” — and calling the conclusion that it does not work “definitive.”

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Source:: Slashdot