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Home / World

Covid 19 coronavirus: Common drug reduces deaths, scientists report

By Benjamin Mueller and Roni Caryn Rabin
New York Times·
16 Jun, 2020 08:22 PM7 mins to read

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A Covid-19 patient in an intensive care ward at St. Joseph's Hospital in New York. Photo / AP

A Covid-19 patient in an intensive care ward at St. Joseph's Hospital in New York. Photo / AP

A steroid, dexamethasone, is the first drug shown to help save severely ill coronavirus patients, according to scientists in Britain.

In an unexpected glimmer of hope amid an expanding pandemic, scientists at the University of Oxford said on Tuesday that an inexpensive and commonly available drug reduced deaths in patients with severe Covid-19, the illness caused by the coronavirus.

If the finding is borne out, the drug, a steroid called dexamethasone, would be the first treatment shown to reduce mortality in the sickest patients and may save hundreds of thousands of lives, eventually even millions, altering the course of the pandemic.

Three-quarters of hospitalised Covid-19 patients receive some form of oxygen. The drug appears to reduce deaths of patients on ventilators by one-third, and deaths of patients on oxygen by one-fifth.

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Had doctors been using dexamethasone to treat the sickest Covid-19 patients in Britain from the beginning of the pandemic, up to 5,000 deaths could have been prevented, the researchers estimated.

Until now, hospitals worldwide have had nothing to offer these desperate, dying patients, and the prospect of a lifesaving treatment close at hand — in almost every pharmacy — was met with something like elation by doctors.

"Assuming that when it goes through peer review it stands — and these are well-established researchers — it's a huge breakthrough, a major breakthrough," said Dr. Sam Parnia, a pulmonologist and associate professor of medicine at the Grossman School of Medicine at New York University. "I cannot emphasise how important this could be."

But the report also comes quick on the heels of a series of blunders and retractions in the scientific literature, as scientists rush to publish research about the coronavirus. While hospitals in the United Kingdom were able to begin treating severely ill Covid-19 patients with dexamethasone on Tuesday, many experts in the United States demanded to see the data and the study itself, which have not yet been peer reviewed or published.

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The drug appears to reduce deaths of patients on ventilators by one-third, and deaths of patients on oxygen by one-fifth, but the study has not yet been peer reviewed. Photo / AP
The drug appears to reduce deaths of patients on ventilators by one-third, and deaths of patients on oxygen by one-fifth, but the study has not yet been peer reviewed. Photo / AP

"It will be great news if dexamethasone, a cheap steroid, really does cut deaths by 1/3 in ventilated patients with COVID19," Dr. Atul Gawande wrote on Twitter, "but after all the retractions and walk backs, it is unacceptable to tout study results by press release without releasing the paper."

There is no vaccine against the coronavirus, and the only treatment known to be effective, an antiviral drug called remdesivir, only shortens the time to recovery.

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"Dexamethasone is the first drug to be shown to improve survival in Covid-19," one of the trial's chief investigators, Peter Horby, a professor of emerging infectious diseases at the University of Oxford, said in a statement. "The survival benefit is clear and large in those patients who are sick enough to require oxygen treatment."

Horby added that dexamethasone should now become the "standard of care in these patients," noting that it was inexpensive, was widely available and could be used immediately.

The drug was not studied in patients outside of the hospital, however, and was not beneficial to patients who were not on respiratory support.

Steroids reduce inflammation in the body, and dexamethasone appears to tamp down the virus' effects on the lungs. Doctors have been trying it in Covid-19 patients overwhelmed by cytokine storms — uncontrolled immune responses so powerful they kill some patients.

Many doctors had feared the drug might actually exacerbate the infection by preventing the immune system from attacking the virus. Though Parnia had treated patients with steroids and seen improvement, "there had not been such a large trial comparing no steroids with steroids."

Even without published results, Matt Hancock, Britain's health secretary, said doctors in the country's National Health Service were able to begin using the steroid as the standard treatment for hospitalised coronavirus patients on Tuesday afternoon. The drug costs less than $1 per day of treatment on a single patient.

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Peter Horby, a professor of emerging infectious diseases at the University of Oxford, right, at a coronavirus press conference with Prime Minister Boris Johnson at 10 Downing Street. Photo / Getty
Peter Horby, a professor of emerging infectious diseases at the University of Oxford, right, at a coronavirus press conference with Prime Minister Boris Johnson at 10 Downing Street. Photo / Getty

The government started stockpiling dexamethasone several months ago based on signs that it could help patients, Hancock said, and now has 200,000 doses on hand.

In the trial led by Horby, about 2,100 severely ill Covid-19 patients were given low doses of dexamethasone, orally or intravenously, once a day. Their outcomes were compared with 4,300 patients who had received the usual care.

The trial was stopped early, because the investigators said that the benefit was obvious. But they said that the drug did not help moderately ill patients who were not receiving oxygen.

Corticosteroids like dexamethasone were used during outbreaks of Sars and Mers, which were also caused by coronaviruses. But those drugs were associated with worse outcomes, another reason for hesitation. An earlier, much smaller trial of Covid-19 patients with acute respiratory distress in Spain found that dexamethasone treatment may reduce the amount of time patients are on ventilators and may reduce deaths.

"What this is effectively doing is tamping down inflammatory responses in patients," Stuart Neil, a professor of virology at King's College London, said in an interview. "It's almost certain this is affecting the body's response against the virus, rather than inhibiting the virus itself."

Dr. Stephen Griffin, an associate professor in virology at the University of Leeds, said that it would be important to study the use of dexamethasone in combination with antiviral treatments like remdesivir.

Dexamethasone has been around for more than 50 years and is widely used to treat diseases like lupus, arthritis, allergies and cancer. Though it may cause side effects, it is generally safe.

Yet many experts urged caution regarding the results of the new study. With scientists rushing to identify treatments for the virus as the outbreak spread around the world, some high-profile findings have had to be retracted or walked back in recent months.

On Monday, the Food and Drug Administration withdrew its emergency use authorization for hydroxychloroquine and chloroquine, drugs touted by President Donald Trump as treatments for Covid-19. Earlier this month, the New England Journal of Medicine and The Lancet retracted major studies because of flawed data.

Dr. Jose Scher, a rheumatologist at New York University, said the drug may represent a "major breakthrough," but noted that the data have yet to be published in full.

"It has to be published and peer reviewed, but if it is in fact true, this is a major breakthrough," he said. But "all these communications, without the actual data, should be taken with caution."

Hospitals in the United States appeared to be waiting to see the full study before making changes.

Dr. Hugh Cassieri, director of critical care medicine at Northwell Health's North Shore University Hospital, said he would wait for the study to be peer reviewed before making changes, and would scrutinise the data personally. "I want to know, 'What was the severity of the patients' illness? Were the patients very, very sick?'"

Randomised controlled trials are supposed to account for the differences between patients. "But sometimes that's not the case, and you have patients who are sicker in the placebo group, and they're more likely to die compared to the treatment group, so you're not really comparing apples to apples," he said.

Doctors also need more information about the drug's side effects, he said.

"This group has credibility," tweeted Dr. Jeremy Faust, an emergency room physician at Brigham and Women's Hospital in Boston. "But what are the neurological outcomes? Do we just cause prolonged suffering in one in eight patients on vents? Or did we help many? No clue!"


Written by: Benjamin Mueller and Roni Caryn Rabin
© 2020 THE NEW YORK TIMES

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