It is the amount of the complete dosage that actually reaches to the circulatory system or blood stream, but it does not all reach the bloodstream at once, so one cannot basically take a blood sample, find out how much drug is in it and separate that quantity by the dose. It is quite totally defined when used accurately.
The Oral bioavailability 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.
Last date updated on September, 2014