the purpose of this study was to design and optimize an oral controlled release acyclovir mucoadhesive tablet, in term of its drug release and mucoadhesive strength. a 32 full factorial design was employed to study the effect of independent variables like carbopol-934p and hydroxypropyl methylcellulose k100m, which significantly influence characteristics like swelling index, ex-vivo mucoadhesiv...

the purpose of this work was to develop once daily sustained release (sr) matrix tablets of naproxen, an anti-inflammatory agent. the tablets were prepared by wet granulation method along with hydrophilic matrix materials like methocel k 15m cr and methocel k 100m cr. the granules were evaluated for bulk density, angle of repose, compressibility index, total porosity and drug content. the table...

Background The anesthetic ketamine after intravenous dosing is nearly completely metabolized to R- and S-stereoisomers of the active norketamine (analgesic, psychoactive) 2,6-hydroxynorketamine (potential analgesic, antidepressant) as well inactive dehydronorketamine. Oral administration favors formation 2,6-hydroxynorketamines via extensive presystemic metabolism. authors hypothesized that pla...

Many novel pharmaceutically active substances are characterized by a high hydrophobicity and a low water solubility, which present challenges for their delivery as drugs. Tablets made from cross-linked hydrophobically modified poly (acrylic acid) (CLHMPAA), commercially available as Pemulen™, have previously shown promising abilities to control the release of hydrophobic model substances. This ...

The present investigation was undertaken with an objective of formulating modified release (MR) matrix tablets of Oxcarbazepine (OXC) an anti-epileptic drug, based on cellulose ether polymers like Hydroxy Propyl Methyl Cellulose (HPMC K4M and LVCR 100) and Hydroxy Propyl Cellulose (HPC JF) as drug release retardants to overcome poor patient compliance and exposure to high doses associated with ...

The release of the active substance from the matrix modified-release tablets based on Kollidon SR and chitosan is dependent on its degree of solubility in the dissolution medium as well as on the matrix forming polymers. Through the complexation of amiodarone hydrochloride with hydroxypropyl-β-cyclodextrin, an inclusion complex was obtained that showed an increase in solubility by more than 200...

INTRODUCTION Imatinib mesylate is an antineoplastic agent which has high absorption in the upper part of the gastrointestinal tract (GIT). Conventional imatinib mesylate (Gleevec) tablets produce rapid and relatively high peak blood levels and requires frequent administration to keep the plasma drug level at an effective range. This might cause side effects, reduced effectiveness and poor thera...

the aim of this study was to develop a derivative of chitosan as pharmaceutical excipient used in sustained-release matrix tablets of poorly soluble drugs. a water-soluble quaternary ammonium carboxymethylchitosan was synthesized by a two-step reaction with carboxymethylchitosan (cmcts), decylalkyl dimethyl ammonium and epichlorohydrin. the elemental analysis showed that the target product with...