Bioavailability

Sa parmakolohiya, ang bioavailability (BA) ay isang subkategorya ng pagsipsip (absorpition) at isang praksyon ng pagbibigay ng dosis ng hindi nagbabagong droga na umabot sa sistemikong sirkulasyon, isa sa pangunahing parmakokinetikong pagkakakilanlan ng droga. Sa depinisyon, kapag ang medikasyon ay naibigay sa intravenous, ang bioavailability ay 100%.[1] Subalit, kapag ang medikasyon ay naibigay sa ibang ruta (tulad ng sa bibig), kadalasang bumababa ang bioavailability TH[›] (dahil sa hindi kumpletong pagsipsip at unang pasa ng metabolismo) o maaaring magbago depende sa pasyente. Isa ang bioavailability sa mga kinakailangang gamit sa parmakokinetiko dahil maaaring maikonsidera ang bioavailability kapag nagkakalkula ng dosis para sa rutang hindi dumadaan sa intravenous.
Tandaan
^ TH: Isa sa mga iilang pasubali ang isang droga na nagpapakita ng F na lagpas ng 100% ay ang theophylline. Kapag naibigay ito sa pamamagitan ng bibig, ang F ay 111%, dahil ang droga ay kumpletong nasisipsip.[2]
Talababa
- ↑ Griffin, J. P. (2009). The Textbook of Pharmaceutical Medicine (ika-6th (na) labas). New Jersey: BMJ Books. ISBN 978-1-4051-8035-1.
- ↑ Schuppan, D.; Molz, K. H.; Staib, A. H.; Rietbrock, N. (1981). "Bioavailability of theophylline from a sustained-release aminophylline formulation (Euphyllin retard tablets) – plasma levels after single and multiple oral doses". International Journal of Clinical Pharmacology, Therapy, and Toxicology. 19 (5): 223–227. PMID 7251238.
Sanggunian
- Rowland, Malcolm; Tozer, Thomas N. (2010). Clinical Pharmacokinetics and Pharmacodynamics: Concepts and Applications (ika-4 (na) labas). Philadelphia, PA: Lippincott Williams & Wilkins. ISBN 978-0-7817-5009-7.
- Welling, Peter G.; Tse, Francis L. S.; Dighe, Shrikant V. (1991). Pharmaceutical Bioequivalence. Drugs and the Pharmaceutical Sciences. Bol. 48. New York, NY: Marcel Dekker. ISBN 978-0-8247-8484-3.
- Hauschke, Dieter; Steinijans, Volker; Pigeot, Iris (2007). "Metrics to characterize concentration-time profiles in single- and multiple-dose bioequivalence studies". Bioequivalence Studies in Drug Development: Methods and Applications. Statistics in Practice. Chichester, UK: John Wiley and Sons. pp. 17–36. ISBN 978-0-470-09475-4. Nakuha noong 21 April 2011.
{{cite book}}: External link in(); Unknown parameter|chapterurl=|chapterurl=ignored (|chapter-url=suggested) () - Chow, Shein-Chung; Liu, Jen-pei (15 October 2008). Design and Analysis of Bioavailability and Bioequivalence Studies. Biostatistics Series. Bol. 27 (ika-3rd (na) labas). Boca Raton, FL: CRC Press. ISBN 978-1-58488-668-6.
Mga kawing panlabas
- Mga ruta ng administrasyon ng droga Naka-arkibo 2013-11-27 sa Wayback Machine.
- Bioavailability ng mga droga Naka-arkibo 2011-11-27 sa Wayback Machine.
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