| Fast-dissolving mucoadhesive microparticulate delivery system containing piroxicam. | |
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MedLine Citation:
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PMID: 15734302 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We have studied the feasibility of preparing fast-dissolving mucoadhesive microparticulate delivery systems containing amorphous piroxicam to improve drug residence time on sublingual mucosa and drug dissolution rate. Two new mucoadhesive carriers, Eudragit L100 (EuLNa) and Eudragit S100 (EuSNa) sodium salts, both characterized by a fast intrinsic dissolution rate, have been selected. Microparticles containing piroxicam and EuLNa (series 1) or EuSNa (series 2) in ratios from 15/85 to 85/15% (m/m) were prepared by spray drying. The morphology and physical state of the microparticles and the effect of the microparticle composition on the piroxicam release and mucoadhesion were investigated. Piroxicam loaded into the microparticles was found to be in the amorphous form at all drug/copolymer ratios. This feature was ascribed to the presence of an H-bond between the NH of piroxicam and a CO of the copolymers. The formation of solid solutions improved the dissolution rate and the apparent drug solubility. The mucoadhesive properties were affected by the drug/copolymer ratio and in series 2 the microparticles containing more than 50% (m/m) of piroxicam did not show mucoadhesive properties. The delivery system made of piroxicam and EuLNa in the ratio 70/30% (m/m) appears to be the most promising because it contains the lowest amount of polymer able to confer mucoadhesive properties and increase apparent drug solubility. |
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Authors:
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Francesco Cilurzo; Francesca Selmin; Paola Minghetti; Isabella Rimoldi; Francesco Demartin; Luisa Montanari |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences Volume: 24 ISSN: 0928-0987 ISO Abbreviation: Eur J Pharm Sci Publication Date: 2005 Mar |
Date Detail:
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Created Date: 2005-02-28 Completed Date: 2005-07-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9317982 Medline TA: Eur J Pharm Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 355-61 Citation Subset: IM |
Affiliation:
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Istituto di Chimica Farmaceutica e Tossicologica, Università degli Studi di Milano, Viale Abruzzi, 42-20131 Milan, Italy. francesco.cilurzo@unimi.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Drug Delivery Systems
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methods* Microspheres* Piroxicam / administration & dosage, pharmacokinetics* Solubility Tissue Adhesives / administration & dosage, pharmacokinetics* |
| Chemical | |
Reg. No./Substance:
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0/Tissue Adhesives; 36322-90-4/Piroxicam |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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