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  • Metformin drastically...

Metformin drastically reduces COVID hospitalization, study shows

Written By : Dr. Kamal Kant Kohli Published On 2022-08-19T12:15:46+05:30  |  Updated On 19 Aug 2022 2:53 PM IST
Metformin drastically reduces COVID hospitalization, study shows
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Metformin is one of most commonly used diabetes drug globally. Researchers at University of Minnesota have found in a new randomized, double blind controlled trial that Metformin reduced serious outcomes by more than half if started within 4 days of COVID symptoms.

The results were published Aug. 18 in the New England Journal of Medicine.

"This was really intriguing to us early on when we learned that people who take metformin were catching COVID less and being hospitalized less," said Elaine Lissner, founder and trustee of small California nonprofit Parsemus Foundation, which works on low-cost solutions neglected by the pharmaceutical industry. "But you don't know whether it's just coincidence until you start at the beginning, with a rigorous randomized trial."

"When we learned that researchers at the University of Minnesota were already trying to raise funds to test it, we jumped at the opportunity."

A little-known past

Metformin, also known as Glucophage, has an added benefit: a little-known past in the 1950s as an anti-viral called "Fluamine." In more recent research, it also seems to affect mTOR inflammation pathways. Since COVID involves viral inflammation, lead researcher Dr. Carolyn Bramante and team thought the combination of anti-inflammatory plus antiviral action was intriguing enough to put to the test.

The study almost didn't happen, though. At the time, most government and pharmaceutical funds were going to vaccine research, or the search for profitable new drugs.

"We took a chance and gave what we could, enough to get the first few study sites started and generate preliminary data to strengthen the case for other funders," said Linda Brent, executive director of the Parsemus Foundation. "But the study never would have made it if it weren't for the dedicated larger funders who believed in it right away and came on board with critical support."

For added rigor, the large University of Minnesota study compared three medications that were considered promising at the time-fluvoxamine, an antidepressant that had shown strong results in previous studies; ivermectin, the object of much interest and passion; and metformin-and provided valuable answers, even about the drugs that were not the clear winner.

"You can argue about details, but in the end, this was kind of 'three strikes and you're out' for ivermectin," said Lissner. "But ivermectin deserved this kind of careful study, head-to-head with other medications, to finally get solid answers. You have to give everything a fair test."

"And I think a lot of us were pretty disappointed that the fluvoxamine results were not conclusive. We did learn that the dose the study used, which was a third to half as much as used in previous studies in an attempt to avoid side effects, was not enough to make a significant difference. I don't think the door is closed on fluvoxamine at higher doses, though."

"But in the end," added Lissner, "you have to accept what the science tells you, no matter which you were rooting for. And it's probably better this way. Metformin is an incredibly common drug, taken by millions of people all over the world. There's no stigma like with an antidepressant, and it's a lot easier to take than the other two."

In 2019, metformin was the fourth-most commonly prescribed medication in the United States, with more than 85 million prescriptions written for over 17 million patients. FDA guidelines indicate that it should not be taken by people with advanced kidney disease, and should be taken with food, or in extended-release formulation, to avoid stomach upset. Side effects are minor and include loose stools. Metformin is also considered safe for use in pregnant women.

The study included 1323 participants most at risk of serious outcomes-adults over 30 and with BMI over 25 kg/m2-to get lifesaving results more quickly. Future studies could include lower-risk participants. However, studies of metformin for other indications, such as the national TAME trial by the American Federation for Aging Research, remain unfunded.

"I think there are lessons for all of us in making sure our global clinical trial systems are more robust and ready to jump in on globally critical studies like this in the future," emphasized Lissner. "It shouldn't be little foundations like us funding studies of global importance. In the meantime, I hope all the hard work and late nights pay off, and clinicians around the world take notice: metformin, an exceedingly inexpensive drug they prescribe every day, if given to high-risk people with COVID right away, can reduce serious outcomes by more than half."

References:

1.Keehner J, Horton LE, Binkin NJ, et al. Resurgence of SARS-CoV-2 infection in a highly vaccinated health system workforce. N Engl J Med 2021;385:1330-1332.

2.Ferdinands JM, Rao S, Dixon BE, et al. Waning 2-dose and 3-dose effectiveness of mRNA vaccines against COVID-19-associated emergency department and urgent care encounters and hospitalizations among adults during periods of delta and omicron variant predominance-VISION Network, 10 states, August 2021-January 2022. MMWR Morb Mortal Wkly Rep 2022;71:255-263.

3.Thompson MG, Natarajan K, Irving SA, et al. Effectiveness of a third dose of mRNA vaccines against COVID-19-associated emergency department and urgent care encounters and hospitalizations among adults during periods of delta and omicron variant predominance-VISION Network, 10 states, August 2021-January 2022. MMWR Morb Mortal Wkly Rep 2022;71:139-145.

4.O'Brien MP, Forleo-Neto E, Musser BJ, et al. Subcutaneous REGEN-COV antibody combination to prevent Covid-19. N Engl J Med 2021;385:1184-1195.

5.Jayk Bernal A, Gomes da Silva MM, Musungaie DB, et al. Molnupiravir for oral treatment of Covid-19 in nonhospitalized patients. N Engl J Med 2022;386:509-520.

New England Journal of MedicineNEJMmetforminhospitalizationCOVID-19drug studiesFDASARS-CoV-2
Source : New England Journal of Medicine,NEJM
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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