In this study,formulation of sustained-releasingmatrix tablet of bupropion 150 mg, using hydroxypropylmethylcellu lose(HPMC) 4000cps was evaluatedwith the aim of reducing the frequency of daily dose. The level of HPMC4000 ,polyvinylpyrolidone(PVP) and magnesium stearate(Mg St)was varied based on a 2level 3 factor factorial experimental designusing the release rate of the drug from the matrices ...

Study aims to design a Gastro retentive Drug Delivery System of Cefuroxime axetil (CA). CA is a broad spectrum beta lactam type of antibiotic. More specifically, it is a second-generation cephalosporin. CA has site specific absorption from upper gastro intestinal tract and in intestine it undergoes hydrolysis to cefuroxime having poor absorption. Unabsorbed drug causes high concentration of ant...

BACKGROUND AND THE PURPOSE OF THE STUDY Lovastatin is an antihyperlipidemic agent which has low bioavailability due to the extensive first pass metabolism. It was sought to increase gastric retention of lovastatin by development of a sustained release gastroretentive drug delivery system leading to reduced fluctuation in the plasma concentration and improved bioavailability. MEHODS: Floating m...

A sustained-release tablet formulation should ideally have a proper release profile insensitive to moderate changes in tablet hardness that is usually encountered in manufacturing. In this study, matrix aspirin (acetylsalicylic acid) tablets with ethylcellulose (EC), Eudragit RS100 (RS), and Eudragit S100 (S) were prepared by direct compression. The release behaviors were then studied in two co...

Carvedilol (CVD) is an antihypertensive agent with a short half-life, pH-dependent solubility, and narrow absorption window. The purpose of this research was to prepare a floating-drug delivery-system of carvedilol to increase its half-life. The present study investigates the preparation of carvedilol-floating microspheres, evaluates the floating-drug delivery-system (FDDS) (by scanning electro...

X-ray crystallographic studies have been carried out on three compounds containing chromium-chromium quadruple bonds: Cr2(02CCH&(H02CCH&, I, C ~ ~ ( O ~ C C H ~ ) ~ ( C S H , , N ) ~ , 11 and [NHI]~[C~~(CQ~)~(M~~)~](H~~)~-~, III. The results, together with those on nine compounds in the literature, are sufficient to indicate a crude general relationship between the donor ability of the bridging...

        Controlled release swellable tablets of phenobarbital were prepared by a simple direct compression process using hydroxypropyl methylcellulose (HPMC) as the matrix former. The effects of the viscosity grades of HPMC and HPMC/lactose ratio and ethylcellulose (EC)/sodium carboxymethylcellulose (NaCMC) and their concentrations on the release behavior of phenobarbital from HPMC matrices wer...

The purpose of the present work was to prepare buccal adhesive tablets of miconazole nitrate. The simplex centroid experimental design was used to arrive at optimum ratio of carbopol 934P, hydroxypropylmethylcellulose K4M and polyvinylpyrollidone, which will provide desired drug release and mucoadhesion. Swelling index, mucoadhesive strength and in vitro drug release of the prepared tablet was ...

The dual release system is used to achieve both quick and sustained release effect from dosage form. The dual release action achieve by using core compressed tablet, bi-layer or multi layer tablet, IR and SR granules containing matrix tablet and capsules. Some researcher formulated dual release system by incorporating disintegrants for immediate release part and different polymers for sustained...