‘A $10 medicine’
Commenting on the findings, David Boulware, MD, MPH, an infectious disease physician-researcher at the University of Minnesota in Minneapolis, noted fluvoxamine is “a $10 medicine that’s available and has a very good safety record.”
By comparison, a 5-day course of Merck’s antiviral molnupiravir, another oral drug that the company says can cut hospitalizations in COVID-19 outpatients, costs $700. However, the data have not been peer reviewed – and molnupiravir is not currently available and has unknown long-term safety implications, Dr. Boulware said.
Pharmaceutical companies typically spend tens of thousands of dollars on a trial evaluating a single drug, he noted.
In addition, the National Institutes of Health’s ACTIV-6 study, a nationwide trial on the effect of fluvoxamine and other repurposed generic drugs on thousands of COVID-19 outpatients, is a $110 million effort, according to Dr. Boulware, who cochairs its steering committee.
ACTIV-6 is currently enrolling outpatients with COVID-19 to test a lower dose of fluvoxamine, at 50 mg twice daily instead of the 100-mg dose used in the TOGETHER trial, as well as ivermectin and inhaled fluticasone. The COVID-OUT trial is also recruiting newly diagnosed COVID-19 patients to test various combinations of fluvoxamine, ivermectin, and the diabetes drug metformin.
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Unanswered safety, efficacy questions
In an accompanying editorial in The Lancet Global Health, Otavio Berwanger, MD, cardiologist and clinical trialist, Academic Research Organization, Hospital Israelita Albert Einstein, São Paulo, Brazil, commends the investigators for rapidly generating evidence during the COVID-19 pandemic.
However, despite the important findings, “some questions related to efficacy and safety of fluvoxamine for patients with COVID-19 remain open,” Dr. Berwanger wrote.
The effects of the drug on reducing both mortality and hospitalizations also “still need addressing,” he noted.
“In addition, it remains to be established whether fluvoxamine has an additive effect to other therapies such as monoclonal antibodies and budesonide, and what is the optimal fluvoxamine therapeutic scheme,” wrote Dr. Berwanger.
In an interview, he noted that 74% of the Brazil population have currently received at least one dose of a COVID-19 vaccine and 52% have received two doses. In addition, deaths have gone down from 4,000 per day during the March-April second wave to about 400 per day. “That is still unfortunate and far from ideal,” he said. In total, they have had about 600,000 deaths because of COVID-19.
Asked whether public health authorities are now recommending fluvoxamine as an early treatment for COVID-19 based on the TOGETHER trial data, Dr. Berwanger answered, “Not yet.
“I believe medical and scientific societies will need to critically appraise the manuscript in order to inform their decisions and recommendations. This interesting trial adds another important piece of information in this regard,” he said.
Dr. Reiersen and Dr. Lenze are inventors on a patent application related to methods for treating COVID-19, which was filed by Washington University. Dr. Mills reports no relevant financial relationships, as does Dr. Boulware – except that the TOGETHER trial funders are also funding the University of Minnesota COVID-OUT trial. Dr. Berwanger reports having received research grants outside of the submitted work that were paid to his institution by AstraZeneca, Bayer, Amgen, Servier, Novartis, Pfizer, and Boehringer Ingelheim.
A version of this article first appeared on Medscape.com.
