2,164
Views
14
CrossRef citations to date
0
Altmetric
Research Article

Effect of Oil-in-Water Submicron Emulsion Surface Charge on Oral Absorption of a Poorly Water-Soluble Drug in Rats

, , , , , , , & show all
Pages 503-514 | Received 24 Jan 2008, Accepted 30 Mar 2008, Published online: 06 Nov 2008

Figures & data

TABLE 1 Approached solubility of griseofulvin in different oil phases

TABLE 2 Composition of the investigated unloaded emulsions

TABLE 3 Compositions (w/w %) of the emulsions incorporating the model drug at two griseofulvin concentrations

FIG. 1 Particle size distribution of freshly prepared (a) negatively, (b) positively, and (c) neutrally charged SE. Results are mean ± SD error bar of three determinations.

FIG. 1  Particle size distribution of freshly prepared (a) negatively, (b) positively, and (c) neutrally charged SE. Results are mean ± SD error bar of three determinations.

TABLE 4 Characteristics at day 0 of griseofulvin loaded and unloaded submicron emulsion

FIG. 2 TEM structure of the droplets of loaded (a) negatively, (b) positively, and (c) neutrally charged submicron emulsions.

FIG. 2  TEM structure of the droplets of loaded (a) negatively, (b) positively, and (c) neutrally charged submicron emulsions.

FIG. 3 Griseofulvin plasma level concentration after intra-aortic administration of griseofulvin (n = 6). Results are mean ± SEM error bar.

FIG. 3  Griseofulvin plasma level concentration after intra-aortic administration of griseofulvin (n = 6). Results are mean ± SEM error bar.

FIG. 4 Griseofulvin plasma level concentration after oral administration of positively charged SE (♦, n = 5), negatively charged SE (▵, n = 6), neutrally charged SE (▪, n = 5), and tablet (□, n = 5). SE: submicron emulsion. Results are mean ± SEM error bar.

FIG. 4  Griseofulvin plasma level concentration after oral administration of positively charged SE (♦, n = 5), negatively charged SE (▵, n = 6), neutrally charged SE (▪, n = 5), and tablet (□, n = 5). SE: submicron emulsion. Results are mean ± SEM error bar.

TABLE 5 Pharmacokinetic parameters of oral formulations

FIG. 5 Median cumulative percent dose absorbed versus time plot (a) and mean input absorption rate (b) extracted using deconvolution analysis for positively charged SE (♦, n = 5), negatively charged SE (▵, n = 6), neutrally charged SE (▪, n = 5), and tablet (□, n = 5). SE: submicron emulsion.

FIG. 5  Median cumulative percent dose absorbed versus time plot (a) and mean input absorption rate (b) extracted using deconvolution analysis for positively charged SE (♦, n = 5), negatively charged SE (▵, n = 6), neutrally charged SE (▪, n = 5), and tablet (□, n = 5). SE: submicron emulsion.

TABLE 6 Drug disposition profiles comparison (similarity test)

TABLE 7 Absorption parameters of oral formulations

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.