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    Preparation and evaluation of furosemide containing orally disintegrating tablets by direct compression
    (Govi-Verlag Pharmazeutischer Verlag Gmbh, 2017) Gulsun, T.; Ozturk, N.; Kaynak, M. S.; Vural, I.; Sahin, S.
    The purpose of this research was to develop and prepare orally disintegrating tablets (ODTs) containing furosemide by direct compression method. Furosemide, microcrystalline cellulose (MCC), low-substituted hydroxypropylcellulose LH-11 (L-HPC), aspartame, sodium stearyl fumarate were used for ODT formulation. MCC and L-HPC were used in ratios of 1:9 (ODT1) and 1:4 (ODT2). The results of the quality control parameters obtained for bulk powders (angle of repose, compressibility index, Hausner ratio, bulk density and volume, apparent density and volume, swelling of superdisintegrants and powder moisture) were taken as an indication of good compressibility of tablets. Both ODT1 and ODT2 disintegrated within 15 s and fulfilled the required disintegration time given by the European Pharmacopoeia (3 min). The average weight variation was less than 5% for both tablets. The friability of the tablets was less than 1%. Wetting time of both tablets was in the range of 12-21.7 s. Water absorption ratio was 1.41 +/- 0.03 for ODT1 and 1.96 +/- 0.10 for ODT2. Dissolution studies revealed that more than 85% of furosemide was dissolved in 15 min from both ODTs. Based on cell culture studies, permeability of furosemide was low (Papp=1x10-(5) cm/s) but increased when prepared in the ODT form (ODT1: Papp=2x10-(5) cm/s; ODT2: Papp=3.6x10-(5) cm/s). Collectively, all these results showed that ODT formulations of furosemide were developed successfully. To improve patient compliance, ODT approach can be suggested for development and manufacturing of furosemide ODTs.