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A novel dosage form for buccal administration of bupropion 60
Almeida,Nilsa Maria Galvão; Lima,Renata; Alves,Thaís Francine Ribeiro; Rebelo,Márcia de Araújo; Severino,Patrícia; Chaud,Marco Vinícius.
Bupropion is an antidepressant used in the treatment of smoking. The purpose of this study was to prepare controlled-release hydrogel films for buccal administration of bupropion and investigate its physicochemical and cytotoxic properties. The films were prepared from ultrapure sodium carboxymethylcellulose, hydroxypropylmethylcellulose K4M, and medium-viscosity chitosan. Evaluation of film physicochemical characteristics was based on scanning electron microscopy, bupropion content, mechanical strength (burst strength, relaxation, resilience, and traction), and cytotoxicity. Bupropion content in bilayer films was 121 mg per 9 cm2. The presence of bupropion modified film mechanical strength, but did not compromise the use of this pharmaceutical form. As...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bupropion/buccal administration; Bilayer films/drugs rellease; Drugs/controlled-release; Tobacco/control.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502015000100091
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A novel approach in mucoadhesive drug delivery system to improve zidovudine intestinal permeability 60
Pedreiro,Liliane Neves; Cury,Beatriz Stringhetti Ferreira; Chaud,Marco Vinícius; Gremião,Maria Palmira Daflon.
ABSTRACT Zidovudine (AZT) mucoadhesive solid dispersions (SD) were prepared using a sodium starch glycolate (SSG) and hypromellose phthalate (HPMCP) mixtures as carrier to enhance the intestinal permeability and bioavailability of zidovudine. SDs were prepared using the co-precipitation method followed by solvent evaporation and characterized according to their physicochemical properties such as particle size, crystallinity, thermal behavior, and liquid uptake ability. In vitro drug dissolution, mucoadhesiveness and AZT intestinal permeability were also determined. Thermal behavior and X-ray diffraction patterns demonstrated the amorphous state of AZT in SD systems. The HPMCP polymer restricted the liquid uptake ability in the acid medium; however, this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zidovudine; Solid dispersion; Mucoadhesion; P-glycoprotein; Intestinal permeability..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000400715
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