"Why are hydroxychloroquine and chloroquine being mentioned with COVID-19? Recent in vitro studies (studies done in a petri dish or test tube rather than in animals or humans) have shown that both hydroxychloroquine and chloroquine have antiviral properties against SARS-CoV-2, the virus that causes COVID-19. In these studies, these medications worked by interfering with the chemical environment of human cell membranes. This blocked the virus from entering and multiplying inside the cells. A medication working in vitro does not always mean that it will work once inside a human body.
Nonetheless, based on these early findings, hospitals worldwide have begun using hydroxychloroquine and chloroquine for patients with COVID-19. On March 28, 2020, the FDA issued an Emergency Use Authorization (EUA) that allows providers to request a supply of hydroxychloroquine or chloroquine for hospitalized patients with COVID-19 who are unable to join a clinical trial. The EUA does not mean that the FDA has approved these medications for the treatment of COVID-19. The intent of the EUA is to help increase access to these medications by allowing doctors to request a supply from the Strategic National Stockpile for these specific cases."
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