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Small Chloroquine Study Halted Over Risk of Fatal Heart Complications
A research trial of coronavirus patients in Brazil ended after patients taking a higher dose of chloroquine, , developed irregular heart rates.
Packets of Nivaquine tablets containing chloroquine, and Plaquenil tablets containing hydroxychloroquine. Both drugs have been promoted as a coronavirus treatment.
Packets of Nivaquine tablets containing chloroquine, and Plaquenil tablets containing hydroxychloroquine.
By Katie Thomas and Knvul Sheikh
April 12, 2020
A small study in Brazil was halted early for safety reasons after coronavirus patients taking a higher dose of chloroquine developed irregular heart rates that increased their risk of a potentially fatal heart arrhythmia.
Chloroquine is closely related to the more widely used drug hydroxychloroquine. President Trump has enthusiastically promoted them as a potential treatment for the novel coronavirus despite little evidence that they work, and despite concerns from some of his top health officials. Last month, the Food and Drug Administration granted emergency approval to allow hospitals to use chloroquine and hydroxychloroquine from the national stockpile if clinical trials were not feasible. Companies that manufacture both drugs are ramping up production.
The Brazilian study involved 81 hospitalized patients in the city of Manaus and was sponsored by the Brazilian state of Amazonas. It was posted on Saturday at medRxiv, an online server for medical articles, before undergoing peer review by other researchers. Because Brazil’s national guidelines recommend the use of chloroquine in coronavirus patients, the researchers said including a placebo in their trial — considered the best way to evaluate a drug — was an “impossibility.”
Despite its limitations, infectious disease doctors and drug safety experts said the study provided further evidence that chloroquine and hydroxychloroquine, which are both used to treat malaria, can pose significant harm to some patients, specifically the risk of a fatal heart arrhythmia. Patients in the trial were also given the antibiotic azithromycin, which carries the same heart risk. Hospitals in the United States are also using azithromycin to treat coronavirus patients, often in combination with hydroxychloroquine.
A research trial of coronavirus patients in Brazil ended after patients taking a higher dose of chloroquine, , developed irregular heart rates.
Packets of Nivaquine tablets containing chloroquine, and Plaquenil tablets containing hydroxychloroquine. Both drugs have been promoted as a coronavirus treatment.
Packets of Nivaquine tablets containing chloroquine, and Plaquenil tablets containing hydroxychloroquine.
By Katie Thomas and Knvul Sheikh
April 12, 2020
A small study in Brazil was halted early for safety reasons after coronavirus patients taking a higher dose of chloroquine developed irregular heart rates that increased their risk of a potentially fatal heart arrhythmia.
Chloroquine is closely related to the more widely used drug hydroxychloroquine. President Trump has enthusiastically promoted them as a potential treatment for the novel coronavirus despite little evidence that they work, and despite concerns from some of his top health officials. Last month, the Food and Drug Administration granted emergency approval to allow hospitals to use chloroquine and hydroxychloroquine from the national stockpile if clinical trials were not feasible. Companies that manufacture both drugs are ramping up production.
The Brazilian study involved 81 hospitalized patients in the city of Manaus and was sponsored by the Brazilian state of Amazonas. It was posted on Saturday at medRxiv, an online server for medical articles, before undergoing peer review by other researchers. Because Brazil’s national guidelines recommend the use of chloroquine in coronavirus patients, the researchers said including a placebo in their trial — considered the best way to evaluate a drug — was an “impossibility.”
Despite its limitations, infectious disease doctors and drug safety experts said the study provided further evidence that chloroquine and hydroxychloroquine, which are both used to treat malaria, can pose significant harm to some patients, specifically the risk of a fatal heart arrhythmia. Patients in the trial were also given the antibiotic azithromycin, which carries the same heart risk. Hospitals in the United States are also using azithromycin to treat coronavirus patients, often in combination with hydroxychloroquine.