Drug Bioavailability:  Its Importance,  A Question Of Quality, Clinical Efficacy Of Drugs, Adverse Drug Reactions

Abstract

‘Bioavailability’ of a drug product, is the relative ability of a drug product to deliver a drug or active ingredient into a living system. Precisely a drug might not act upon a definite target organ unless it has an access to it through the circulatory system. A biopharrnaceutic expert would define it as— ‘the rate and extent to which the ingredient is absorbed from the drug product into the body or to the site of action’. It is measured by blood, serum or plasma levels or from urinary excretion data.

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