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Floating ability and drug release evaluation of gastroretentive microparticles system containing metronidazole obtained by spray drying BJPS
Nohemann,Laís; Almeida,Marina Penteado de; Ferrari,Priscileila Colerato.
Abstract Gastroretentive floating microparticles were developed and evaluated for the controlled metronidazole delivery for treatment of gastric disease. Floating microparticles, varying in proportions of chitosan and hydroxypropyl methylcellulose or ethylcellulose, were obtained by spray drying. Floating microparticles were characterized by physicochemical and in vitro studies, according to their floating ability and drug delivery. Microparticles presented mean diameter from 1.05 to 2.20 µm. The infrared spectroscopy confirmed the drug encapsulation and showed no chemical linkage between microparticles components. X-ray diffraction showed changes in the drug`s solid state, from crystalline to amorphous, indicating partial drug encapsulation, due to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floating microparticle; Chitosan; Ethylcellulose; Hydroxypropyl methylcellulose; Controlled drug delivery..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000100611
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