Use of in vitro lipid digestion data to explain the in vivo performance of triglyceride-based oral lipid formulations of poorly water-soluble drugs: Studies with halofantrine

2004 ◽  
Vol 93 (5) ◽  
pp. 1110-1121 ◽  
Author(s):  
Christopher J.H. Porter ◽  
Ann Marie Kaukonen ◽  
Agnes Taillardat-Bertschinger ◽  
Ben J. Boyd ◽  
Jacquelyn M. O'Connor ◽  
...  
Keyword(s):  
Water Soluble ◽  
Lipid Digestion ◽  
Poorly Water Soluble Drugs ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Lipid Formulations

scholarly journals Development of a New Ex Vivo Lipolysis-Absorption Model for Nanoemulsions

Pharmaceutics ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 164 ◽  
Author(s):  
Lu Xiao ◽  
Ying Liu ◽  
Tao Yi
Keyword(s):  
Ex Vivo ◽  
Water Soluble ◽  
Absorption Model ◽  
Poorly Water Soluble Drugs ◽  
Everted Gut Sac ◽  
In Vivo Absorption ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble

The use of lipid-based formulations (LBFs) in improving the absorption of poorly water-soluble drugs has now well established. Because the in vivo evaluation of LBFs is labor-intensive, in vitro or ex vivo approaches could provide advantages. In this study, a new ex vivo lipolysis-absorption model (evLAM) composed of an intestinal digestion system and an intestinal tissue system was developed to evaluate and predict the in vivo absorption performances of LBFs. Model factors, including the pH of the system and concentrations of d-glucose and pancreatic lipase, were investigated and optimized by a Box-Behnken design. To evaluate this new model, a lipid formulation of indomethacin, which was chosen based on preliminary studies of pseudo-ternary phase diagrams, emulsion droplets, and solubility, was further investigated by an in vivo pharmacokinetic study of rats, the everted gut sac model, and the evLAM, respectively. The absorption percentages obtained from the evLAM were much more similar to the data of rats in vivo than those from the everted gut sac model, showing a preferable in vitro-in vivo correlation (r = 0.9772). Compared with the conventional in vitro and in vivo methods, the evLAM, which allowed precise insights into the in vivo absorption characteristics without much time or a complicated process, could be a better tool for assessing LBFs of poorly water-soluble drugs.

scholarly journals Solubility enhancement of carvedilol using drug–drug cocrystallization with hydrochlorothiazide

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Shivarani Eesam ◽  
Jaswanth S. Bhandaru ◽  
Chandana Naliganti ◽  
Ravi Kumar Bobbala ◽  
Raghuram Rao Akkinepally
Keyword(s):  
Aqueous Solubility ◽  
Sem Analysis ◽  
Water Soluble ◽  
High Permeability ◽  
Poorly Water Soluble Drugs ◽  
Drug Discovery And Development ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Dissolution In Vitro

Abstract Background Increasing hydrophilicity of poorly water-soluble drugs is a major challenge in drug discovery and development. Cocrystallization is one of the techniques to enhance the hydrophilicity of such drugs. Carvedilol (CAR), a nonselective beta/alpha1 blocker, used in the treatment of mild to moderate congestive heart failure and hypertension, is classified under BCS class II with poor aqueous solubility and high permeability. Present work is an attempt to improve the solubility of CAR by preparing cocrystals using hydrochlorothiazide (HCT), a diuretic drug, as coformer. CAR-HCT (2:0.5) cocrystals were prepared by slurry conversion method and were characterized by DSC, PXRD, FTIR, Raman, and SEM analysis. The solubility, stability, and dissolution (in vitro) studies were conducted for the cocrystals. Results The formation of CAR-HCT cocrystals was confirmed based on melting point, DSC thermograms, PXRD data, FTIR and Raman spectra, and finally by SEM micrographs. The solubility of the prepared cocrystals was significantly enhanced (7.3 times), and the dissolution (in vitro) was improved by 2.7 times as compared to pure drug CAR. Further, these cocrystals were also found to be stable for 3 months (90 days). Conclusion It may be inferred that the drug–drug (CAR-HCT) cocrystallization enhances the solubility and dissolution rate of carvedilol significantly. Further, by combining HCT as coformer could well be beneficial pharmacologically too.

Solubilisation of poorly water-soluble drugs during in vitro lipolysis of medium- and long-chain triacylglycerols

2004 ◽  
Vol 23 (3) ◽  
pp. 287-296 ◽  
Author(s):  
Janne Ørskov Christensen ◽  
Kirsten Schultz ◽  
Birgitte Mollgaard ◽  
Henning Gjelstrup Kristensen ◽  
Anette Mullertz
Keyword(s):  
Water Soluble ◽  
Poorly Water Soluble Drugs ◽  
In Vitro Lipolysis ◽  
Water Soluble Drugs ◽  
Poorly Water Soluble ◽  
Long Chain
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