Enhancement of Nasal Delivery of a Renin Inhibitor in the Rat Using Emulsion Formulations

Overview

Journal Pharm Res

Specialties Pharmacology
Pharmacy

Date 1992 Aug 1

PMID 1409372

Citations 3

Authors

T T Kararli

T E Needham

G Schoenhard

D A Baron

R E Schmidt

B Katz

B Belonio

Affiliations

Soon will be listed here.

Abstract

Nasal absorption of O-(N-morpholino-carbonyl-3-L-phenylaspartyl-L-leucinamide of (2S,3R,4S)-2-amino-1-cyclohexyl-3,4-dihydroxy-6-methylheptane (I), a renin inhibitor, was evaluated in two rat nasal models, one involving surgery and the other requiring no surgical intervention. Oleic acid/monoolein emulsion formulations were tested along with a control PEG 400 solution. The percent absolute bioavailability of the compound was enhanced from 3-6% (PEG 400 solution) to 15-27% when the emulsion formulations were used. The different nasal model techniques (with and without surgery) did not produce any statistical difference in the absolute bioavailability values for I. Emulsion formulations did not produce appreciable damage as assessed morphologically. It is suggested that emulsion formulations containing membrane adjuvants such as oleic acid and monoolein can be used to enhanced the nasal delivery of low-bioavailable, lipid-soluble drugs.

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Oral delivery of a renin inhibitor compound using emulsion formulations.

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