PK

Bioavailability Studies for NDA or IND Guidance

06/07/2022

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The US Food and Drug Administration (FDA) released a guidance “Bioavailability Studies Submitted in NDAs or INDs – General Considerations” in April 2022. Bioavailability (BA) is defined as “the rate and extent to which the active ingredient or active moiety is absorbed from a drug product and becomes available at the site of action.”