Bioavailability Studies and Assessment

Bioavailability is a subcategory of pharmacological absorption. Bioavailability is generally assessed by finding the area under the plasma concentration–time curve. The factors affecting bioavailability are Pharmaceutics factors, physicochemical properties of drug, Dosage form characteristics & Pharmaceutic Ingredients, Patient related factors like age, Routes of administration (Parenteral, Rectal, Oral, and Topical)  etc.

Conducting a BA study enables assessment of the impact of route of administration on BA and defines the absolute BA of the drug released from the drug product. BA for a given formulation provides an assessment of the relative fraction of the orally administered dose that is absorbed into the systemic circulation. If the reference standard is an IV dose, it is referred as Absolute Bioavailability. If the reference standard is any other dosage form than IV it is referred as Relative Bioavailability

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