The Canadian health authorities have issued a warning against the use of anti-malarial drugs “chloroquine and hydroxychloroquine” to treat the infections of coronavirus or prevent reinfections.

Canada’s public health agency said, “Chloroquine and hydroxychloroquine can have serious side effects. These drugs should be used only under the supervision of a physician,” it was posted on Saturday on its website.

“Health Canada is concerned that some people may be directly buying and using chloroquine or hydroxychloroquine to prevent or treat COVID-19,” noting they can cause “serious heart rhythm problems, it said.

However, the European Medicines Agency and the US Food and Drug Administration has issued similar warnings about the drugs thus week, whose promise as a coronavirus treatment has been touted by US President Donald Trump.

Health Canada said chloroquine and hydroxychloroquine were approved to treat malaria and certain autoimmune diseases like lupus and rheumatoid arthritis but also known to cause liver or kidney problems, low blood sugar, and nervous system problems.

Also it said, “The effects on heart rhythm… in the most serious cases, may be fatal.”

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