| Popis: |
Piroxicam-arginine complex was prepared to improve the solubility and dissolution rate of poorly water-soluble piroxicam. Its formation was identified by infrared spectrophotometry, differential thermal analysis and dissolution rate. Piroxicam complex dispersible tablets, commercial dispersible tablets and piroxicam physical mixture hard capsules were prepared to compare dissolution rate in water. Dissolved amounts (%) after 15 mins of piroxicam complex dispersible tablets, commercial dispersible tablets and piroxicam physical mixture hard capsules were 98%, 48% and 10%, respectively. The solubility of complex in water was significantly higher than that of piroxicam itself. In vivo, pharmacokinetic parameters were obtained after oral administrations of piroxicam complex and physical mixture at a does of 2 mg to New Zealand White Rabbit. The of piroxicam complex was similar to that of piroxicam. However, there were much difference between the two formulations with regard to and AUC. The of piroxicam alone was 4 hours, but that of piroxicam complex was 0.8 hours. In addition, the AUC of piroxicam complex was 1.38 times greater than that of piroxicam alone. |
