While earlier studies showed the apparent benefit of one of these drugs, dexamethasone, this latest evidence goes further.
It shows other cheap and readily available corticosteroid drugs, including hydrocortisone, could benefit patients at the life-threatening stages of coronavirus infection.
Remind Me Again, What Are Corticosteroids?
Corticosteroids have been used for decades to treat a variety of inflammatory conditions. These include severe forms of lung inflammation, such as pneumonia, shock due to infection, and severe respiratory syndromes. They are also used to treat more common conditions, including asthma and eczema.
What Do We Already Know About Corticosteroids for COVID-19?
In June, early release of results from the RECOVERY trial showed dexamethasone reduced the risk of death by up to a third in people hospitalised with COVID-19 who needed a ventilator to help them breathe.
Despite the early release of the trial results, and limited details at the time, the findings were compelling and clinical practice changed.
Several other trials were stopped. All patients switched to receive active treatment with a corticosteroid.
The results of the RECOVERY trial have since been formally peer reviewed and published.
This is a powerful and compelling way to combine information and truly address the question of whether these medicines benefit people in hospital critically unwell with COVID-19.
The study, which included patients from Australia and New Zealand, found almost 33% of people treated with corticosteroids died within 28 days of treatment. This was compared with 41% of patients who received supportive care (or placebo). Corticosteroid treatment helped patients whether or not they needed ventilation or oxygen.
Importantly, the analysis also concluded the benefits were not specific to one corticosteroid drug but were the same for dexamethasone and hydrocortisone.
Corticosteroids can also have an impact on the immune system. So the researchers looked at the risk of infection from other causes, for example bacterial pneumonia, and found it was not a major concern.
What Does This Mean for Patients?
The weight of evidence has led WHO guidelines this week to strongly recommend using corticosteroids to treat people with severe or critical COVID-19.
Corticosteroids Are Not for Everyone and Are Not a Cure
It is important to remember these findings only apply to using corticosteroids in critically ill people hospitalised with COVID-19. There is currently limited information to suggest these medicines are appropriate for people with mild COVID-19.
While corticosteroids help treat the body’s response to the coronavirus infection, they are not antiviral drugs. They do not inhibit the virus itself, so they are not a cure.
A New Way of Doing Research
Usually, several clinical trials on a common theme are published over a series of years. Then a meta-analysis draws together their results, publishing these combined results much later.
Evidence to guide the best treatments and management for people with COVID-19 continues to emerge. You can follow the evidence and how it’s applied in Australia here.
ABOUT THE AUTHOR
Professor Andrew McLachlan is the Head of School and Dean of Pharmacy in the Sydney Pharmacy School and a Member of the Order of Australia. He is the former Program Director of the NHMRC Centre for Research Excellence in Medicines and Ageing and previously Professor of Pharmacy (Aged Care) (2006-2018) in the then Faculty of Pharmacy and at Concord Hospital’s Centre for Education and Research on Ageing. He is a pharmacist, academic and researcher experienced in clinical pharmacology and research on the quality use of medicines. His research focuses on understanding the variability in response to medicines and how this can be managed to optimise patient care, particularly in special patient populations such as older people, the very young and the critically ill. He is interested in translating clinical pharmacology research and high quality clinical trial evidence into real-world practice.