A large study published in the medical journal (Lancet) indicated that the malaria drug, hydroxy chloroquine, which US President Donald Trump says he is taking and urging others to use, is linked to an increased risk of death for patients of the emerging coronavirus (Covid-19) whose condition requires hospitalization.

In the study, which dealt with more than 96,000 cases of emerging coronavirus in hospitals, it was found that those treated with "hydroxychloroquine" or "chloroquine" were more likely to die than patients who were not treated with the two drugs.

The authors of the study said they could not confirm whether taking this drug offered any benefit to Corona patients, and they wrote: "There is a need for rapid confirmation from randomized clinical trials." The study did not include trials that were controlled using the drug with a placebo comparison.

The infection of hospitalized patients is usually more severe than others, and some proponents of using the two drugs as a treatment for the disease say that it may be necessary to use them in an early stage to be effective.

Randomized controlled clinical trials are being conducted to study the efficacy of the drug in preventing infection with the emerging coronavirus, as well as in treating mild and moderate infections with Covid-19. Results of some of these experiments may appear within weeks.

The demand for hydroxychloroquine, a decades-old treatment with Trump's repeated pressure to use it to treat the virus, has increased and his demand for people to try it. He said, "You will not lose anything," noting that he uses hydroxychloroquine as a preventive treatment, despite the lack of scientific evidence.

The authors of the study suggested that the two drugs be used as a treatment for disease other than clinical trials until studies confirm their safety and efficacy for Covid-19 patients.

The US Food and Drug Administration said that hydroxychloroquine should only be used with corona patients in hospitals or in clinical trials. The two drugs were linked to serious heart rhythm problems.

The study looked at data from 671 hospitals, in which 14,888 patients were given either hydroxychloroquine or chloroquine, with or without an antibiotic, and 81,144 patients were not treated with these drugs.

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