The property wherein 2 medicines with equivalent active components (as a brand-name drug and its common equivalent) or 2 distinct drugs dosage forms (as tablet and oral suspension) of the same drug have identical bioavailability and generate the similar impact at the site of physiological activity. The open access journals are peer reviewed scholarly journals of Journal of Bioequivalence & Bioavailability. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted. The top open access journals are indexed in SCOPUS, COPERNICUS, CAS, EBSCO and ISI.