FDA Alert on Compounding Remdesivir for Covid

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FDA is urging drug compounders not to compound drug products using any remdesivir active pharmaceutical ingredient (API) due to its complex nature that makes it challenging to compound. “Remdesivir API is complex and neither a United States Pharmacopeia monograph nor other public quality standard for the API used in FDA-approved remdesivir is available,” an agency alert says. “Remdesivir API has six stereocenters and has multiple polymorphic forms,” it says. Using API forms that differ from the approved API may affect the compounded drug’s quality and solubility.

 

FDA 10/2020 approved a Gilead Sciences NDA for remdesivir, indicated for treating patients with Covid-19 that requires hospitalization. It previously was available in the U.S. under an emergency use authorization for treating hospitalized patients with severe Covid-19. The approval covers the use in adult and pediatric patients 12 years of age and older and weighing at least 88 pounds. Pediatric trials are ongoing, the agency says.

 

FDA’s alert also says it is aware of various entities (separate from the suppliers named in the approved remdesivir NDA) selling what they claim to be remdesivir API. “FDA often lacks detailed information about the composition and quality of the API that suppliers sell to compounders,” it adds.

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