Physicochemical characterization of parenteral lipid emulsion: influence of cosurfactants on flocculation and coalescence.

Abstract:

PURPOSE:The stability of lipid emulsions (LE) containing various cosurfactants (oleic acid, cholesterol, Tween 80, or HCO-60) was evaluated using the maximum total interaction energy, Vtmax and the energy barrier for coalescence, W. METHODS:The Vtmax and W were calculated from the zeta potential and the rate of increase in LE particle size, respectively. RESULTS:The Vtmax and W of LE containing the oleic acid were 0.598 x 10(-19) J and 3.03 x 10(-19) J, respectively, while those of LE without the cosurfactant were 0.141 x 10(-19) J and 1.36 x 10(-19) J. CONCLUSIONS:These findings suggest that oleic acid prevents the flocculation and coalescence of LE. The Vtmax and W of LE containing the cholesterol were 0.435 x 10(-19) J and 0.63 x 10(-19) J, respectively, suggesting that the cholesterol prevents the flocculation of LE but does not affect the coalescence. Analysis of the stability of LE was performed by the separate considerations of the flocculation and coalescence.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Yamaguchi T,Nishizaki K,Itai S,Hayashi H,Ohshima H

doi

10.1023/a:1016205203264

subject

Has Abstract

pub_date

1995-09-01 00:00:00

pages

1273-8

issue

9

eissn

0724-8741

issn

1573-904X

journal_volume

12

pub_type

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