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Author(s): Kulkarni Parthasarathi Keshavarao | Dixit Mudit | Panner Selvam | Achin Jain

Journal: International Research Journal of Pharmacy
ISSN 2230-8407

Volume: 3;
Issue: 9;
Start page: 174;
Date: 2012;
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Keywords: Naproxen | Solid dispersion | PEG 4000 | PEG 6000 | Urea | In vitro release.

Naproxen, an anti-inflammatory drug, exhibits poor water solubility and flow properties. Naproxen is poor water soluble and may show dissolution limited absorption. The solid dispersion of naproxen by physical triturating method, and fusion method were prepared using 1:1, 1:4 and 1:5 ratios of drug and polymers (PEG 4000, PEG 6000 and urea). The solid dispersion (SD) was characterized for physical appearance, solubility, IR, and in vitro dissolution studies. FTIR study revealed that drug was stable in SDs. Solubility of naproxen from SDs increased in distilled water. The drug content was found to be high and uniformly distributed in the all formulation. The in vitro dissolution studies were carried using USP type XXVII (paddle) type dissolution apparatus. The prepared dispersion showed marked increase in the dissolution rate of naproxen than that of pure drug. The dispersion with PEG 6000 (1:5) by fusion method showed faster dissolution rate (107.26%) as compared to other dispersions with PEG 4000 and urea (1:4 and 1:5) whichever prepared by physical mixture (PM) and fusion method). Of the three carriers used, dissolution of the drug was more in PEG 6000 based SDs. It is concluded that dissolution of the Naproxen could be improved by the solid dispersion and PEG6000 based solid dispersions were more effective in enhancing the dissolution.
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