FDA’s Revocation of the Hydroxychloroquine and Chloroquine EUA May Test the Limits of PREP Act Immunity

On June 15, 2020, the U.S. Food & Drug Administration (FDA) revoked the Emergency Use Authorization (EUA) that permitted emergency distribution of chloroquine phosphate (CQ) and hydroxychloroquine sulfate (HCQ) from the Strategic National Stockpile. (https://www.fda.gov/media/138945/download) The FDA concluded, based on clinical trial data and the continuing failure of treatment guidelines to support use of CQ or HCQ to treat patients with COVID-19, that “it is no longer reasonable to believe that oral formulations of HCQ and CQ may be effective in treating COVID-19, nor is it reasonable to believe that the known and potential benefits of these products outweigh their known and potential risks.”

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