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  • Title: Emulsion/solvent evaporation as an alternative technique in pellet preparation.
    Author: Palmieri GF, Grifantini R, Di Martino P, Martelli S.
    Journal: Drug Dev Ind Pharm; 2000 Nov; 26(11):1151-8. PubMed ID: 11068688.
    Abstract:
    Paracetamol/Eudragit RS, paracetamol/ethylcellulose, and paracetamol/cellulose acetate pellets of different drug/polymer ratios (w/w) were prepared by the dissolution/solvent evaporation technique. These pellets were then characterized by particle size distribution analysis, ultraviolet (UV) spectroscopy, differential thermal analysis, and scanning electron microscopy (SEM). Hard gelatin capsules were filled with each particle size fraction of these pellets, and in vitro dissolution studies were performed to verify the capability of each series of pellets to control drug release. Pellets were spherical, presented a polynucleated microcapsule structure, and under certain experimental conditions, the yield of the preparation process reached very high values. The dissolution studies pointed out the slow paracetamol release from these pellets.
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