کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
602452 879977 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Factors affecting release rate of diltiazem hydrochloride from poly (2-hydroxyethyl methacrylate) matrices
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Factors affecting release rate of diltiazem hydrochloride from poly (2-hydroxyethyl methacrylate) matrices
چکیده انگلیسی

Sustained release diltiazem hydrochloride (DIL) formulation is widely used over 110 countries worldwide, and is among the drugs recommended as a first-line therapy in the major guidelines for the management of hypertension. In search for a most suitable controlled release formulation of DIL, we investigated poly (2-hydroxyethyl methacrylate) matrix (pHEMA matrix) synthesized by photopolymerization. Factors affecting the release rate of DIL from pHEMA matrices were investigated, focusing on the internal structure of the matrices. The effects of the porosity (ɛ), the fractal dimensions (Df) and the microscopic viscosity (ηmatrix) of the matrices on the release rate of DIL were investigated on the basis of the linear least square equation as well as the Higuchi's equation. A relation between the actual value and predicted value based on the linear least square equation exhibited a fairly good linearity (r = 0.979). Furthermore, the release rate of DIL was represented based on the Higuchi's equation including the values of ɛ, Df and ηmatrix. It is likely that the release rate of DIL from pHEMA matrices is mainly controlled by ɛ and Df, but ηmatrix was less effective.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 63, Issue 1, 1 May 2008, Pages 146–152
نویسندگان
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