Release of 5-fluorouracil from intramuscular w/o/w multiple emulsions.

Abstract:

:Comparative in vivo studies of aqueous solution, multiple w/o/w, and w/o emulsions showed that formulating 5-fluorouracil in emulsion systems significantly sustained the release of the drug from intramuscular injection sites in the rat. Intramuscular injection of the drug in both w/o and w/o/w emulsion systems produced sustained blood concentrations with a later blood level peak than observed following intramuscular injection of aqueous solutions of the drug. The multiple w/o/w emulsion exhibited a more rapid release of drug from the injection site than the w/o emulsion because of partitioning of the drug to the external aqueous phase during secondary emulsification. The fate of the oil phase following intramuscular injection of a water/hexadecane/water multiple emulsion spiked with 1-14C-hexadecane has been studied in rats as a function of stabilizer concentrations. Increasing the lipophilic surfactant (Span 80) concentration facilitated the clearance of the oily vehicle from the injection site, by mechanisms which remain to be elucidated.

journal_name

Biopharm Drug Dispos

authors

Omotosho JA,Whateley TL,Florence AT

doi

10.1002/bdd.2510100305

subject

Has Abstract

pub_date

1989-05-01 00:00:00

pages

257-68

issue

3

eissn

0142-2782

issn

1099-081X

journal_volume

10

pub_type

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