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Physicochemical characterization and solubility enhancement studies of allopurinol solid dispersions BJPS
Changdeo,Jagdale Swati; Vinod,Musale; Shankar,Kuchekar Bhanudas; Rajaram,Chabukswar Anuruddha.
Allopurinol is a commonly used drug in the treatment of chronic gout or hyperuricaemia associated with treatment of diuretic conditions. One of the major problems with the drug is that it is practically insoluble in water, which results in poor bioavailability after oral administration. In the present study, solid dispersions of allopurinol were prepared by solvent evaporation, kneading method, co-precipitation method, co-grinding method and closed melting methods to increase its water solubility. Hydrophilic carriers such as polyvinylpyrrolidone, polyethylene glycol 6000 were used in the ratio of 1:1, 1:2 and 1:4 (drug to carrier ratio). The aqueous solubility of allopurinol was favored by the presence of both polymers. These new formulations were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allopurinol; Polyethylene glycol 6000; Solid dispersions; Closed melting method; Dissolution enhancement.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000300009
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Characterization of gliclazide-polyethylene glycol solid dispersion and its effect on dissolution BJPS
Patil,Moreshwar Pandharinath; Gaikwad,Naresh Janardan.
The present study was initiated with the objective of studying the in vitro dissolution behavior of gliclazide from its solid dispersion with polyethylene glycol 6000. In this work, a solid dispersion of gliclazide with polyethylene glycol was prepared by the fusion method. In vitro dissolution study of gliclazide, its physical mixture and solid dispersion were carried out to demonstrate the effect of PEG 6000. Analytical techniques of FT-IR spectroscopy, differential scanning calorimetry and X-ray diffractometry were used to characterize the drug in the physical mixtures and solid dispersions. The dissolution studies of solid dispersion and physical mixture showed greater improvement compared to that of the pure drug. The mechanisms for increased...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gliclazide; Polyethylene glycol 6000; Solid dispersion; In vitro dissolution.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000100020
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