NCIt definition : 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. For drug products that
are not intended to be absorbed into the bloodstream, bioavailability may be assessed
by measurements intended to reflect the rate and extent to which the active ingredient
or active moiety becomes available at the site of action (21CFR320.1).;
Alternative definition : CDISC-GLOSS: Rate and extent to which a drug is absorbed or is otherwise available
to the treatment site in the body.; CDISC: The rate and extent to which the active drug ingredient or therapeutic moiety
is absorbed from a drug product and becomes available at the site of drug action.
(US FDA 21 CFR 320.1);