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Dexamethasone is a venerable corticosteroid medication that has been used against a wide range of diseases and conditions. Wikipedia credits the first preparation of the drug in 1957 to physician Philip S. Hench and co-workers at the Mayo Clinic (Rochester, MN); but no peer-reviewed references are cited. (Hench was a co-winner of the 1950 Nobel Prize for Physiology or Medicine for the discovery of cortisone.)

The following year, Glen E. Arth and colleagues at Merck (Rahway, NJ) as part of their search for new steroidal anti-inflammatory medicines. One month later, Eugene P. Oliveto and coauthors at Schering (Bloomfield, NJ) and Massachusetts General Hospital (Boston) Patents describing dexamethasone syntheses were awarded to two other drug companies in 1961.

Dexamethasone has been used to treat allergies, brain swelling, tuberculosis, autoimmune conditions, and several lung diseases. Its versatility prompted the World Health Organization to include it in its Model List of Essential Medicines. But dexamethasone has many adverse side effects that range from acne to vertigo.

Perhaps it is not surprising that the variety of dexamethasone’s medical uses has led researchers to administer it to COVID-19 patients. In a British study called RECOVERY (for Randomised Evaluation of COVID-19 Therapy), more than 11,000 patients with serious cases of the disease were given one of several treatments, including oral or injected dexamethasone. Of the approximately 2100 subjects given dexamethasone, the patients on ventilators compared with control subjects. Those who required oxygen without a ventilator had about 20% fewer deaths.

It should be noted that as of June 22, 2020, the study’s results had not been peer-reviewed.