The systemic bioavailability of buprenorphine by various routes of administration
- 1 September 1981
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Pharmacy and Pharmacology
- Vol. 33 (1), 500-506
- https://doi.org/10.1111/j.2042-7158.1981.tb13848.x
Abstract
The systemic bioavailability of buprenorphine has been studied in female rats following single doses (200 μg kg−1) administered by one of six different routes. Relative to the 100% bioavailability from the intraarterial route the mean bioavailabilities were intravenous, 98%; intrarectal, 54%; intrahepatoportal, 49%; sublingual, 13%; and intraduodenal, 9·7%. Area under the curve analysis of buprenorphine concentrations in blood showed the relative fractions of drug extracted (first pass) by gut, liver and lung to be 0·80, 0·50 and 0·02 respectively, In situ absorption studies showed that the poor availability of intraduodenally administered buprenorphine is not due to slow or incomplete absorption.This publication has 23 references indexed in Scilit:
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