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- W2099768227 abstract "The preparation of ketoprofen (KP) sustained release (SR) suppositories was designed according to the 32 × 21 factorial design as three different KP:Eudragit RL 100 ratios (1:0.5, 1:1, 1:2), three particle sizes of prepared granules (250–500, 500–710, and 710–1000 μm) and two different PEG 400:PEG 6000 ratios (40:60, 50:50). The conventional KP suppositories were also prepared by using Witepsol H 15, Massa Estarinum B, Cremao and the mixture of PEG 400:PEG 6000. The dissolution studies of suppositories prepared were carried out according to the USP XXIII basket method in the phosphate buffer (pH = 7.2) at 50 rpm, and it was shown that the dissolution time was sustained up to 8 hours. According to the results of the factorial design, the most important independent variable on t50 and t80 was drug:polymer ratios. The log of partition coefficient of KP was determined as 1.46, showing the high affinity to the oily phase. n exponent and kinetic studies were conducted to explain diffusion mechanism, and it is understood that if the inert KP:Eudragit RL 100 ratio is increased in the particles, the Fickian difusion dominates and the best kinetic turns to Higuchi from the Hixson-Crowell. There is neither crystalline form of KP nor degradation product in the suppositories detected with the differential scanning calorimetry (DSC) studies. In addition to these studies, antiinflammatory activity of SR suppositories also determined that it was significantly extended according to the conventional suppositories." @default.
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- W2099768227 date "2007-01-01" @default.
- W2099768227 modified "2023-10-10" @default.
- W2099768227 title "The Preparation and Evaluation of Sustained Release Suppositories Containing Ketoprofen and Eudragit RL 100 by Using Factorial Design" @default.
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- W2099768227 doi "https://doi.org/10.1080/10837450701196565" @default.
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