Jpc-journal of Planar Chromatography-modern Tlc, 2009
The quality of bioanalytical data is highly dependent on selection of an appropriate regression m... more The quality of bioanalytical data is highly dependent on selection of an appropriate regression model for calibration plots. In bioanalyt-ical assays, variance normally increases with concentration. Use of a traditional approach with heteroscedastic data will lead to ...
Microencapsulation of the anti-inflammatory drug aceclofenac (ACE) was investigated as a means of... more Microencapsulation of the anti-inflammatory drug aceclofenac (ACE) was investigated as a means of controlling drug release and minimizing or eliminating local side effects. Microspheres were prepared by a spray-drying technique using solutions of ACE and three polymers, namely, carbopol, chitosan, and polycarbophil, in different weight ratios. The spray-dried mucoadhesive microspheres were characterized in terms of shape (scanning electron microscope), size (6.60-8.40 mum), production yield (34.10-55.62%), and encapsulation efficiency (58.14-90.57%). In vitro release studies were performed in phosphate buffer (pH 6.8) up to 10 hours. The spray-drying process of solutions of ACE with polymeric blends can give prolonged drug release. The in vitro release data were well fit into Higuchi and Korsmeyer-Peppas model and followed Fickian diffusion mechanism. In vivo data showed that the administration of ACE in polymeric microspheres prevented the gastric side effects. The formulations here described can be proposed for the oral administration of nonsteroidal anti-inflammatory drugs with minimal side effects on gastric mucosa.
Jpc-journal of Planar Chromatography-modern Tlc, 2009
The quality of bioanalytical data is highly dependent on selection of an appropriate regression m... more The quality of bioanalytical data is highly dependent on selection of an appropriate regression model for calibration plots. In bioanalyt-ical assays, variance normally increases with concentration. Use of a traditional approach with heteroscedastic data will lead to ...
Microencapsulation of the anti-inflammatory drug aceclofenac (ACE) was investigated as a means of... more Microencapsulation of the anti-inflammatory drug aceclofenac (ACE) was investigated as a means of controlling drug release and minimizing or eliminating local side effects. Microspheres were prepared by a spray-drying technique using solutions of ACE and three polymers, namely, carbopol, chitosan, and polycarbophil, in different weight ratios. The spray-dried mucoadhesive microspheres were characterized in terms of shape (scanning electron microscope), size (6.60-8.40 mum), production yield (34.10-55.62%), and encapsulation efficiency (58.14-90.57%). In vitro release studies were performed in phosphate buffer (pH 6.8) up to 10 hours. The spray-drying process of solutions of ACE with polymeric blends can give prolonged drug release. The in vitro release data were well fit into Higuchi and Korsmeyer-Peppas model and followed Fickian diffusion mechanism. In vivo data showed that the administration of ACE in polymeric microspheres prevented the gastric side effects. The formulations here described can be proposed for the oral administration of nonsteroidal anti-inflammatory drugs with minimal side effects on gastric mucosa.
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