using ion-exchange resins, a multiple-unit type of oral floating dosage system has been prepared to prolong gastric emptying time of dosage form. the system is composed of beads of drug-resin complex, which are loaded with bicarbonate ions and coated with a hydrophobic polymer. the system is so designed that when the beads reach the stomach, chloride ions are exchanged with bicarbonate and drug...

the main objective of this study was to prepare colon-specific pellets of budesonide, using pectin as film coating. pellet cores of budesonide were prepared by extrusion / spheronization technique. pectin, in different ratios was combined with eudragit rs30d, eudragit ne30d or surelease to produce film coating. the dissolution profiles of pectin coated pellets were investigated in ph of 1.2 (2 ...

Hot melt extrusion has gained considerable attention as a novel technique for taste masking of bitter APIs. The aim of this study was to investigate whether hot melt extrusion could be used to develop taste masked formulations of isoniazid and also to evaluate and correlate different taste assessment methods Two polymers with different physico-chemical properties, Soluplus and Eudragit E-PO wer...

Partially purified α-galactosidase from Bacillus sp. LX-1 was non-covalently immobilized on a reversibly soluble-insoluble polymer, Eudragit L-100, and an immobilization efficiency of 0.93 was obtained. The optimum pH of the free and immobilized enzyme was 6.5 to 7.0 and 7.0, respectively, while there was no change in optimum temperature between the free and immobilized α-galactosidase. The imm...

The present study was undertaken to 1) formulate a pulsatile colonic delivery of simvastatin (SIM) as chronotherapy for treatment of hypercholesterolemia, and 2) enhance the dissolution profile of the prepared SIM chronotherapeutic system. Lipid based formulations were utilized to formulate SIM in capsule dosage form coated with Eudragit® S100. SIM was formulated using different percentages of ...

Ketorolac is a potent non-steroidal drug with potent analgesic and anti-inflammatory activity. Its oral administration is associated with a high risk of adverse effects such as irritation, ulceration and bleeding of gastrointestinal tract. The present study focuses on the development of controlled release drug delivery system of ketorolac microcapsules as one of the multi-particulate formulatio...

In the present work, monolithic matrix transdermal systems containing Drug x were prepared using various ratios of the polymer blends of hydroxy propyl methyl cellulose (HPMC) and Eudragit S 100 (ES) with triethyl citrate as a plasticizer. A 32 full factorial design was employed. The concentration of HPMC and ES were used as independent variables, while percentage drug release was selected as d...

The objective of this investigation was to develop the hollow microspheres as a new dosage form of floating drug delivery system with prolonged stomach retention time. Hollow microspheres containing ranitidine hydrochloride were prepared by solvent evaporation method using Eudragit RLPO dissolved in a mixture of dichloromethane and ethanol. The maximum yield and drug loading amount of hollow mi...

Coating or encapsulation of nanoparticles is a major challenge due to the extremely small size, high surface energy, and high surface area of the nanoparticles. In this paper we describe a new method using supercritical CO2 as an anti-solvent (SAS) for nanoparticle coating/encapsulation. A model system, using silica nanoparticles as host particles and Eudragit polymer as the coating material, w...

In the present study controlled release formulation of Indomethacin microsponges were prepared by using Eudragit RS 100, pH independent release retardant polymer and PVA, stabilizer or emulsifier. Microsponges were prepared by Quasi emulsion solvent diffusion method by changing drug polymer ratio (3:1, 4:1, 5:1) and process was optimized. Microsponges were evaluated by micromeritic properties, ...