Effect of PEG 4000 on the dissolution rate of naproxen View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1998-06

AUTHORS

I. Vélaz, M. Sánchez, C. Martín, M. C. Martínez-Ohárriz

ABSTRACT

Naproxen is a nonsteroidal anti-inflammatory drug characterized by its low wettability and poor water solubility. Solid dispersions naproxen:PEG 4000 have been prepared in order to improve the solubility and dissolution rate of the drug, since these factors can be the limiting steps for absorption and bioavailability of poorly soluble drugs. X-ray diffraction analysis, infrared spectroscopy and differential scanning calorimetry detected no physico-chemical interaction between the drug and the inert carrier PEG 4000. The phase diagram of the naproxen-PEG 4000 system produced by DSC and hot stage microscopy is reported. The intrinsic dissolution rate of naproxen is calculated. The dissolution kinetics of solid dispersions prepared by the solvent and melt methods are compared with those of free drug and physical mixture. The studies were carried out at 37 degrees C and pH 1.2 according to the dispersed amount method. The dissolution profiles obtained indicate that a significant dissolution enhancement occurs with solid dispersions in comparison with the physical mixture. In addition, the physical mixture showed a dissolution rate higher than the free drug. Dissolution rate constants were determined by fitting the experimental data to the cube root function, to get straight line plots. More... »

PAGES

103-108

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf03189323

DOI

http://dx.doi.org/10.1007/bf03189323

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1019000628

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/9725465


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