Abstract:
:To develop a piroxicam-loaded gelatin microcapsule with enhanced bioavailability, a gelatin microcapsule encapsulated ethanol and piroxicam has been formulated by using gelatin as a water-soluble polymer shell. The aqueous solubility and bioavailability of piroxicam in piroxicam-loaded microcapsule in rats were then evaluated compared to piroxicam powder. The piroxicam-loaded gelatin microcapsule spherical in shape with smooth surface showed the geometric mean diameter of about 19 microm. It had the piroxicam solubility of about 1.87 mg/ml and the amount of ethanol of about 4.37 microg/mg. Furthermore, it gave significantly higher total plasma concentrations, Cmax and area under the blood concentration-time curve (AUC) of piroxicam in rats than did piroxicam powder, indicating that the drug from gelatin microcapsule could be more orally absorbed in rats. In particular, the AUC of piroxicam in gelatin microcapsule was significantly about 2 fold increased compared to piroxicam powder. This enhanced oral relative bioavailability of piroxicam in gelatin microcapsule was contributed by the marked increase in the absorption rate of piroxicam due to the improved solubility of piroxicam. Thus, the piroxicam-loaded gelatin microcapsule developed using spray-drying technique with gelatin, sodium lauryl sulfate and ethanol would be useful to deliver piroxicam in a pattern that allows fast absorption in the initial phase, leading to better absorption.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Piao MG,Yang CW,Li DX,Kim JO,Jang KY,Yoo BK,Kim JA,Woo JS,Lyoo WS,Han SS,Lee YB,Kim DD,Yong CS,Choi HGdoi
10.1248/bpb.31.1284subject
Has Abstractpub_date
2008-06-01 00:00:00pages
1284-7issue
6eissn
0918-6158issn
1347-5215pii
JST.JSTAGE/bpb/31.1284journal_volume
31pub_type
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