The Food and Drug Administration (FDA) warned on Monday that co-administering antiviral drug remdesivir with chloroquine phosphate or hydroxychloroquine sulfate may reduce its anti-viral activity.
In an alert (pdf) on Monday, the FDA said chloroquine phosphate (CQ) and hydroxychloroquine sulfate (HCQ) is “unlikely to be effective in treating COVID-19” and that it’s potential benefits don’t outweigh the potential risks, which is a requirement for Emergency Use Authorization (EUA).