https://www.fda.gov/media/97321/download
page 12
d. No Alternatives
For FDA to issue an EUA, there must be no adequate, approved, and available alternative to the
candidate product for diagnosing, preventing, or treating the disease or condition. A potential
alternative product may be considered “unavailable” if there are insufficient supplies of the
approved alternative to fully meet the emergency need. A potential alternative product may be
considered "inadequate" if, for example, there are contraindicating data for special circumstances
or populations (e.g., children, immunocompromised individuals, or individuals with a drug
allergy), if a dosage form of an approved product is inappropriate for use in a special population
(e.g., a tablet for individuals who cannot swallow pills), or if the agent is or may be resistant to
approved and available alternative products.
https://twitter.com/BusyDrT/status/1289613782222696449
https://www.fda.gov/media/97321/download