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FDA Letter to Stakeholders: Do Not Use Chloroquine Phosphate Intended for Fish as Treatment for COVID-19 in Humans

From the U.S. Food and Drug Administration:

The FDA’s Center for Veterinary Medicine has recently become aware that some consumers may mistake chloroquine phosphate used to treat disease in aquarium fish for FDA-approved drugs (used to treat malaria and certain other conditions in humans) that are being studied as a COVID-19 treatment for humans. Unfortunately, we have learned that one person in the United States has died after he and his wife reportedly took chloroquine used to treat their fish in an attempt to prevent COVID-19; his wife also became very ill. We are continuing to investigate this incident.

While FDA is aware of the use of unapproved drugs to treat aquarium fish, our primary concern during the COVID-19 pandemic is the imminent threat to the health of consumers who may take animal drugs thinking they are interchangeable with approved human drugs. Chloroquine products sold for aquarium use have not been evaluated by the FDA to determine whether they are safe, effective, properly manufactured, and adequately labeled for use in fish–let alone humans. Products marketed for veterinary use, “for research only,” or otherwise not for human consumption have not been evaluated for safety in humans. People should not take any form of chloroquine unless it has been prescribed by a licensed healthcare provider and is obtained through a legitimate source.

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