PURPOSE To develop a bio-assay that would be able to directly test gastrointestinal and/or dissolution samples to determine lipase activity and inhibition by Orlistat. METHODS Enzyme assays were performed with porcine pancreatic lipase and para-Nitrophenyl Palmitate (pNPP) in pH 8.0 reaction buffer at 37°C. Substrate hydrolysis was monitored by absorbance changes at 410 nm. The dissolution of...

Trimetazidine is an effective anti-anginal agent and anti-ischaemic effect. The objective of this study was to assess the in vitro dissolution and to evaluate the bioavailability of two brands of trimetazidine dihydrochloride tablets. Prior to the in vivo PKs study, an in vitro comparative dissolution test was performed for 2 oral brands of trimetazidine dihydrochloride tablets (20 mg). In vivo...

Aceclofenac is an analgesic and anti-inflammatory agent used in the management of osteoarthritis, rheumatoid arthritis and ankylosing spondylitis. The objective of the present work was to investigate the effect of different types of carriers such as polyvinyl pyrrolidone (PVP), polyethylene glycol (PEG) 6000 and sodium lauryl sulphate (SLS) as solubilizer on in vitro dissolution of aceclofenac....

Due to complexity and interplay of variable gastrointestinal conditions with matrix tablets which are predominantly erosion controlled it is often difficult to predict in vivo release profile [1]. Nascent gel layer of matrix tablets is prone to mechanical stress which is difficult to simulate in vitro. Present study describes approaches to establish a biorelevant in vitro test for evaluation of...

Solid dispersions of tanshinone IIA (TanIIA) using hydroxyapatite (HAp) as the dispersing carrier (TanIIA-HAp SDs) were prepared by the solvent evaporation method. The formed solid dispersions were characterized by scanning electron microscopy (SEM), differential scanning calorimetry analysis (DSC), X-ray powder diffraction (XRPD) and Fourier transforms infrared (FTIR) spectroscopy. The in vitr...

Objective(s) The purpose of the present study was to use the solid dispersion (SD) technique to improve the dissolution rates of indomethacin (IMC). Materials and Methods IMC solid dispersions in PVP K30 and isomalt (GALEN IQ 990) were prepared using the solvent evaporation technique and a hot melt method in weight ratios of 2, 10 and 30% (IMC:PVP). Solid dispersions and physical mixtures we...

the present work was aimed to design and develop self-nanoemulsifying drug delivery systems (snedds) with the objective to overcome the problems associated with the delivery of talinolol, a hydrophobic and poorly bioavailable drugs having ph dependant solubility. the solubility of talinolol in various oils, surfactants, cosurfactants and aqueous phases were determined to identify and select the...

the pharmacokinetic parameters of domestic and imported ranitidine hydrochloride tablets (ranitidine, formulated and manufactured by kharazmi pharmaceuticals, iran, and zantac ? manufactured by glaxo, uk) were measured in 14 healthy subjects following oral administration of a single 300-mg dose of each brand and compared for bioequivalence evaluation. the pharmaceutical equivalency of both form...