NCIt definition : The absence of a significant difference in the rate and extent to which the active
ingredient or active moiety in pharmaceutical equivalents or pharmaceutical alternatives
becomes available at the site of drug action when administered at the same molar dose
under similar conditions in an appropriately designed study. Where there is an intentional
difference in rate (e.g., in certain controlled release dosage forms), certain pharmaceutical
equivalents or alternatives may be considered bioequivalent if there is no significant
difference in the extent to which the active ingredient or moiety from each product
becomes available at the site of drug action. This applies only if the difference
in the rate at which the active ingredient or moiety becomes available at the site
of drug action is intentional and is reflected in the proposed labeling, is not essential
to the attainment of effective body drug concentrations on chronic use, and is considered
medically insignificant for the drug (21CFR320.1).;
Alternative definition : CDISC-GLOSS: Scientific basis on which drugs with the same active ingredient(s) are
compared. NOTE: To be considered bioequivalent, the bioavailability of two products
must not differ significantly when the two products are given in studies at the same
dosage under similar conditions.;