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  • Title: Formulation and release behavior of diclofenac sodium in Compritol 888 matrix beads encapsulated in alginate.
    Author: Mirghani A, Idkaidek NM, Salem MS, Najib NM.
    Journal: Drug Dev Ind Pharm; 2000 Jul; 26(7):791-5. PubMed ID: 10872101.
    Abstract:
    Sustained-release polymer beads containing diclofenac sodium (DNa) dispersed in Compritol 888 and encapsulated in calcium alginate shell were prepared utilizing 2(3) factorial design. The effect of sodium alginate concentration, drug: Compritol 888 weight ratio and CaCl2 concentration on drug content (%), time for 50% and 80% of the drug to be released, and mean dissolution time (MDT) were evaluated with analysis of variance (ANOVA). An increase in the level of all these factors caused retardation in the release, and t50%, t80%, and MDT were increased. The drug release was dependent on the pH of the release media. A formula that gives a release comparable to commercial products was prepared.
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