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Chloroquine: Malaria drug may help treat coronavirus-doctors say

Chloroquine: Malaria drug may help treat coronavirus-doctors say

What do malaria and COVID-19 have in common? On the surface, not much. But according to early research, an old malaria drug called chloroquine might also work for the newย coronavirus.

Could a decades-old malaria drug work to treat COVID-19? Elon Musk seems to think so, recently tweeting that it “might be worth considering chloroquine” for COVID-19. Although data are spare, studies so far seem to back up the billionaire entrepreneurโ€™s suggestion.

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Chloroquine, or hydroxychloroquine, has been used to treat malaria since 1944. It can be given before exposure to malaria to prevent infection, and it can also be given as treatment afterward.

Malaria is a disease that is caused by a parasite, unlike COVID-19. Nevertheless, laboratory studies show chloroquine is effective at preventing as well as treating theย virus that causes severe acute respiratory syndrome, or SARS, a close cousin of COVID-19.

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Given chloroquineโ€™s effectiveness in treating SARS, scientists have investigated if it will be an effective treatment against the new coronavirus responsible for COVID-19. So far, the initial trials are encouraging.

“There is evidence that chloroquine is effective when they looked at SARS in vitro with primate cells,” said Dr. Len Horovitz, a pulmonologist and internist at Lenox Hill Hospital in New York City. “The theory of the experiment with primate cells was that chloroquine could be for preventing viral infection or as a treatment for viral infection after it had occurred. In vitro in these primate cells, there was evidence that viral particles were significantly reduced when chloroquine was used.”

Both the virus that causes SARS and the virus responsible for COVID-19 belong to the same overarching family of coronaviruses. Researchers inย Chinaย discovered that the protein spikes on the surface of the COVID-19 virus areย similar to the protein spikesย found on the surface of the SARS virus.

Medical staff shows on Feb. 26, 2020, at the IHU Mediterranee Infection Institute in Marseille, a packet of Nivaquine, containing chloroquine, a malaria drug that has shown signs of effectiveness…ย more

Medical staff shows on Feb. 26, 2020, at the IHU Mediterranee Infection Institute in Marseille, a packet of Nivaquine, containing chloroquine, a malaria drug that has shown signs of effectiveness against coronavirus, according to a study.Gerard Julien/AFP via Getty Images

People become infected when those protein spikes bind to special receptors on the outside of human cells. Chloroquine works byย interfering with those receptors, which may interfere with the virusโ€™s ability to bind to cells.

“The way that it worked against SARS was by preventing of the attachment of the virus to the cells. Chloroquine interfered with the attachment to that receptor on the cell membrane surface,” Horovitz said. “So itโ€™s disrupting a lock and key kind of mechanism of attachment.”

Researchers in China found that treating patients with COVID-19-associated pneumonia with chloroquine may shorten their hospital stay and improve the patientโ€™s outcome.

There are more than 20 ongoingย clinical trialsย in China andย more scheduled to start in England, Thailand, South Korea and the United States.

Coronavirus map: Tracking the spread in the US and around the world

Researchers are also exploring whether chloroquine could be used prophylactically — that is, to prevent infection before it occurs. It is particularly key “forย healthcare workers that get sick,” noted Dr. Eric Cioe-Pena, director of Global Health at Northwell Health in New Hyde Park, New York. “Prophylaxis is a viable treatment option, at least in theory. It needs to be studied. It could be studied while in use. It is something we need to look at, and as terms of a candidate for preventing disease spread and severity.”

While the U.S. waits for the results of additional trials and FDA approval, researchers caution that doctors should only prescribe the drug for their patients under a special program that allows exceptions for experimental drugs during public health emergencies,ย under a frameworkย set up by the World Health Organization.

“For the 85% of patients with mild to moderate symptoms that will go home, they donโ€™t need this treatment and donโ€™t want this treatment โ€“ itโ€™s not valuable to them, it doesnโ€™t offer any benefit,” said Dr. Cioe-Pena. “There could be minimal risk, but still risk. Risk of an allergic reaction is really a risk of a side effect, and they are going to get better anyway.”

Medical staff shows on Feb. 26, 2020, at the IHU Mediterranee Infection Institute in Marseille, a packet of Nivaquine, tablets containing chloroquine, a commonly used malaria drug that has…ย more

Medical staff shows on Feb. 26, 2020, at the IHU Mediterranee Infection Institute in Marseille, a packet of Nivaquine, tablets containing chloroquine, a commonly used malaria drug that has shown signs of effectiveness against coronavirus, according to a study conducted in several Chinese hospitals.Gerard Julien/AFP via Getty Images

Thankfully, the potential side effects of the drug are minimal.

“The principle side effects reported were headaches, gastrointestinal side effects like nausea, diarrhea and hair loss, primarily,” said Horovitz.

This is very encouraging news. More encouraging still is that there are several other promising drugs being studied, including the HIV anti-retroviral drug Kaletra (lopinavir/ritonavir) and the anti-Ebola medication remdesivir.

In the meantime we should each do our part by engaging in social distancing, self-quarantining and self-isolating when appropriate, to stop the spread of this pandemic.

Angela N. Baldwin, M.D., M.P.H., is a pathology resident at Montefiore Health System in the Bronx and a contributor to the ABC News Medical Unit

Source-abcnews.go.com

Trump Says FDA Approved Anti-Malaria Drug Chloroquine To Test As Coronavirus Treatment

 

 

Chloroquine: Malaria drug may help treat coronavirus-doctors say

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