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A cheap, readily available steroid drug reduced deaths by a third in patients hospitalized with Covid-19 in a large study, the first time a therapy has been shown to possibly improve the odds of survival with the condition in the sickest patients.

Full data from the study have not been published or subjected to scientific scrutiny. But outside experts on Tuesday immediately embraced the top-line results. The drug, dexamethasone, is widely available and is used to treat conditions including rheumatoid arthritis, asthma, and some cancers.


In a statement, Patrick Vallance, the U.K. government’s chief scientific adviser, called the result “tremendous news” and “a ground-breaking development in our fight against the disease.” Scott Gottlieb, a former commissioner of the U.S. Food and Drug Administration, called it “a very positive finding” in an interview on CNBC. “I think it needs to be validated, but it certainly suggests that this could be beneficial in this setting.”

Atul Gawande, the surgeon, writer and public health researcher, urged caution, tweeting, “after all the retractions and walk backs, it is unacceptable to tout study results by press release without releasing the paper.”

The study randomly assigned 2,104 patients to receive six milligrams of dexamethasone once a day, by mouth or intravenous injection. These were compared to 4,321 patients assigned to receive usual care alone. 


In patients who needed to be on a ventilator, dexamethasone reduced the death rate by 35%, meaning that doctors would prevent one death by treating eight ventilated patients. In those who needed oxygen but were not ventilated, the death rate was reduced 20%, meaning doctors would need to treat 25 patients to save one life. Both results were statistically significant.

There was no benefit in patients who didn’t require any oxygen. The researchers running the study, called RECOVERY, decided to stop enrolling patients on dexamethasone on June 8 because they believed they had enough data to get a clear result.

“Dexamethasone is the first drug to be shown to improve survival in COVID-19,” Peter Horby, one of the lead investigators of the study and a professor in the Nuffield Department of Medicine at the University of Oxford, said in a statement. He added that the drug should now become the standard treatment for patients with Covid-19 who need oxygen. “Dexamethasone is inexpensive, on the shelf, and can be used immediately to save lives worldwide.’”

A different arm of the same study showed on June 5 that hydroxychloroquine, widely touted as a potential Covid treatment, had no benefit in hospitalized patients. Yesterday, based in part on those results, the Food and Drug Administration revoked an Emergency Use Authorization for using hydroxychloroquine in those patients.

From the start of the pandemic in March, researchers have focused on two different stages of Covid-19, which will likely require very different interventions. Some drugs are designed to directly combat the novel coronavirus, SARS-CoV-2, that causes the disease. The first medicine shown to have a benefit, remdesivir from the biotech firm Gilead Sciences, falls into this category, even though, because it must be given intravenously, it has been tested in hospitalized patients. Remdesivir shortens the course of infection, but has not been shown to save lives.

After patients have become profoundly sick, the problem starts to become not only the virus but their own immune system, which attacks the lungs, a condition called acute respiratory distress syndrome, or ARDS. For these patients, doctors have believed, they would need to dampen patients’ immune response even as they fought the virus.

Initially, excitement in this area fell on new and expensive drugs, such as Actemra, a rheumatoid arthritis drug from Roche that is used to treat a similar condition caused by some cancer immunotherapies. But a study in patients who needed oxygen showed no benefit from a similar drug, although another arm in sicker patients is continuing. The National Institutes of Health is conducting a study of an Eli Lilly pill targeting rheumatoid arthritis, an extension of the study that showed remdesivir has a benefit.

Dexamethasone, which reached the market 59 years ago, seemed an unlikely candidate to help these patients; it was seen as too crude a way of tamping down the immune system. In guidelines for physicians treating the disease, the NIH doesn’t even mention the therapy.

Studies that are testing other medicines may now need to incorporate the use of the drug, which could complicate analyzing the results. A spokesperson for Regeneron, which is testing Covid-19 drugs focused on both attacking the virus and dampening the immune system, said the company’s studies are written so that when a new medicine becomes the standard of care, it becomes available to patients in the trial.

Some studies have shown a benefit for using dexamethasone in acute respiratory distress syndrome not related to Covid-19, although the benefit was smaller than in RECOVERY. 

The result, should it hold up to further scrutiny, shows the benefit of the strategy of Horby and Martin Landray, the Oxford researchers who designed the study, leveraging the U.K. health system to start a study of multiple inexpensive potential Covid-19 therapies — including hydroxychloroquine, dexamethasone, and also some older HIV medicines. Several months into the Covid-19 pandemic, two of the most important results come from this single study.

Neither of those results, however, have been scrutinized or published.


  • The low dosage and a short course of treatments appear to be the two key elements revealed by the UK doctors/scientists.

    As one of the glucocorticoids, dexamethasone could also lead to very severe side effects if the large dosages and a long term of use come with it. During SARS-COV-1 in 2003, a large scale of the therapeutical practices had shown the other side of the coin.

  • I am so happy that many physicians realized this back in March-April and started to use steroids for hospitalized COVID 19 patients presenting with shortness of breath , needing oxygen or desaturating and seeing immense benefit for those patients who they gave steroids compared to those that they did not. They almost felt it unethical to wait for the results of a study and that too relegate to a placebo arm without an immunomodulator when the main reason people succumb to COVID 19 appears to by far the damage caused by the extensive cytokine storm by the virus.

  • It will definitely help the patient with Covid 19. Easily available, Very much cost effective. Hence Steroid should be included in the treatment regimen as a routine medicine along with other treatment protocol specially for Indian patients.

  • Dexamethasone is the king of the steroids. It has the highest affinity of any drug known.
    Immunosuppression with dexamethasone appears beneficial in the critical phase of COVID19. I worry that people will take it as a preventative, which would potentially be counterproductive. You don’t want to inhibit the immune response when the virus is first taking hold.

  • At least six countries have been doing clinical trials with it for quite a while. A few months ago, the Chinese CDC had glucocorticoids in its guideline and no results were published to date.

  • This is not surprising; I would expect prednisone to have similar effects. Both steroids are useful for *short term* suppression of immune system responses, which may be useful when someone is fighting a COVID-19 infection.

    I still remember my first burst treatment with prednisone to relieve chronic asthma symptoms, starting at a high dosage, then rapidly tapering over the course of a week or ten days. The effects were dramatic: I could breathe again within 2 hours, and the treatment broke the asthma cycle.

    But different people react differently, so corticosteroids are not a magic bullet. I become slightly euphoric (because they make me feel so good), while others may feel suicidal. Still, they are inexpensive, their effects and side effects are well understood, so this treatment is worth pursuing. As usual, each patient has to be evaluated separately, and people should not start gobbling corticosteroids without supervision.

  • The Recovery trial also included using Convalescent plasma (collected from donors who have recovered from COVID-19 and contains
    antibodies against the SARS-CoV-2 virus) treatments.
    What are the trial results of using convalescent plasma?

    • Here’s a good article using natural substances in his protocol; it includes an interview with Dr. M. about the institutional barriers to non-PhRMA interventions: j

  • That’s presumably why they used the value of 8 rather than 10 to make the point; it makes the maths work for the saving one life in n. In the UK 41% of COVID-19 patients on a ventilator die: so 3.28/8 (standard care) v 2.18/8 (Dexamethasone treatment) given, as actually reported by the study authors themselves, a one third reduction in mortality.

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