نتایج جستجو برای: sustained release systems

تعداد نتایج: 1446795  

اکبری, جعفر, سعیدی, مجید, عنایتی فرد , رضا, کلوی, لاله,

Background and purpose: In ocular delivery the physiological constraints imposed by the protective mechanisms of the eye lead to low absorption of drugs, resulting in a short duration of the therapeutic effect. Thus using in-situ gelling systems could increase the residence time of the drug in the eye. These systems are instilled as drops into the eye and undergo a sol-to-gel transition in the ...

AbstractVarious nanoparticles have been investigated as novel drug delivery systems, including solid lipid nanoparticles (SLNs). Due to their rapid clearance from systemic circulation, nanoparticles do not provide sustained action in most cases. Different strategies have been employed to overcome this problem. In this direction, the present study introduces erodible in-situ forming gel systems ...

2008
Hiromi TASAKI

SUMMY A 71-year-old man with paroxysmal atrial fibrillation who had a previous anterior myocardial infarction exhibited granulocytopenia 8 days following the administration of oral sustained-release procainamide (750mg/day). The plasma concentrations of procainamide and N-acetyl procainamide were at subtherapeutic levels. Discontinuation of procainamide led to complete recovery. A bone marrow a...

Journal: :research in pharmaceutical sciences 0
m jelvehgari m maghsoodi h nemati

the objective of the present investigation was to design a sustained release floating microcapsules of theophylline using two polymers of different permeability characteristics; eudragit rl 100 (eu rl) and cellulose acetate butyrate (cab) using the oil-in-oil emulsion solvent evaporation method. polymers were used separately and in combination to prepare different microcapsules. the effect of d...

Journal: :Journal of controlled release : official journal of the Controlled Release Society 2012
Stefanie Wöhl-Bruhn Muhammad Badar Andreas Bertz Brigitte Tiersch Joachim Koetz Henning Menzel Peter P Mueller Heike Bunjes

Hydrogel systems based on hydroxyethyl starch-polyethylene glycol methacrylate (HES-P(EG)(6)MA) or hydroxyethyl starch methacrylate (HES-MA) were used to assess the protein release behavior. Here, we analyzed the in vitro release of FITC-anti-human antibodies incorporated in either HES-P(EG)(6)MA or HES-MA hydrogel delivery systems in PBS or human serum. In addition, hydrogel disks and micropar...

Journal: :iranian journal of pharmaceutical research 0
ms islam s reza h rahman

extended-release matrix tablets of diltiazem hydrochloride (dtz) were prepared using waxy materials alone or in combination with kollidon sr. matrix waxy materials were carnauba wax (cw), bees wax (bw), cetyl alcohol (ca) and glyceryl monostearate (gms). dissolution studies were carried out by using a six stations usp xxii type 1 apparatus. the in vitro drug release study was done in 1000 ml ph...

2002
V. R. Sinha Amita Nanda Rachna Kumria

cyclodextrins (CDs) is a practical and economical way to improve the physicochemical and pharmaceutical properties of administered drug molecules. CDs can improve properties such as solubility, stability, and bioavailability of various drugs, thereby potentially serving as novel drug carriers. In addition, the hydrophobic and ionizable derivatives of CDs are being tested for use in the preparat...

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