Noninvasive porosity measurement of biconvex tablets using terahertz pulses.
Abstract Biconvex pharmaceutical microcrystalline cellulose (MCC) compacts were investigated by the detection of terahertz (THz) pulse delay in the transmission measurement mode. The dimensions of the tablets were kept as constants but the porosity was a priori known variable. It is shown that the porosity of the biconvex compact has a linear correlation with the THz pulse delay. […]
Analytical method development for powder characterization: Visualization of the critical drug loading affecting the processability of a formulation for direct compression.
Abstract Characterization of particulate systems (powders) is one of the remaining scientific challenges. Evaluation of powder behaviour is often empirical and the decision-making processes are experience-based. There is a need for development of analytical instrumentation enabling more fundamental understanding of powder behaviour. Flowability and tabletability, two key factors in commercial scale manufacturing of tablets with […]
A Simplified Model of Moisture Transport in Hydrophilic Porous Media With Applications to Pharmaceutical Tablets.
Abstract This work establishes a predictive model that explicitly recognizes microstructural parameters in the description of the overall mass uptake and local gradients of moisture into tablets. Model equations were formulated based on local tablet geometry to describe the transient uptake of moisture. An analytical solution to a simplified set of model equations was solved […]
Intermediate release formulations of diclofenac potassium tablets for IVIVC.
Abstract In recent days response surface methodology (RSM) has widely been applied for development and optimization of cost effective formulations with required quality. Study comprised of three steps including micromeritic comparison of different powder blends of placebo and diclofenac potassium (DP), formulation designing with CCRD (Design Expert, version 7.0.0), and stability testing of selected formulations […]
Quality by Design (QbD) Approach for Development of Co-Processed Excipient Pellets (MOMLETS) By Extrusion-Spheronization Technique.
Abstract BACKGROUND: Microcrystalline cellulose (MCC) is an excellent excipient for production of pellets by extrusion spheronization. However, it causes slow release rate of poorly water soluble drugs from pellets. Co-processed excipient prepared by spray drying (US 4,744,987; US 5686107; WO 2003/051338) and co-precipitation technique (WO 95/17831) are patented. OBJECTIVE: The objective of present study was to […]
To Study Capping or Lamination Tendency of Tablets Through Evaluation of Powder Rheological Properties and Tablet Mechanical Properties of Directly Compressible Blends.
Abstract Air entrapment efficiency of the powders is one of the main factors leading to occurrence of capping or lamination tendency of tablets manufactured from the directly compressible powder blends. The purpose of the current research was to study this underlying cause leading to occurrence of capping or lamination of tablets through evaluation of powder […]
Photostable Solid Dispersion of Nifedipine by Porous Calcium Silicate.
Abstract Nifedipine (NIF) is a typical light-sensitive drug requiring protection from light during manufacture, storage, and handling of its dosage forms. The purpose of this study was to evaluate the utility of porous calcium silicate (PCS) for maintaining the photostability of NIF in a solid dispersion formulation. Adsorption solid dispersion (ASD) prepared using NIF and PCS […]
Development and Characterization of Multifunctional Directly Compressible Co-processed Excipient by Spray Drying Method.
Abstract The present investigation was carried out to develop and characterize a multifunctional co-processed excipient for improving the compressibility of poorly compressible drugs. Etodolac was used as a model drug. Microcrystalline cellulose (MCC), lactose monohydrate (lactose), and StarCap 1500 (StarCap) were selected as components of the co-processed excipient. The spray drying method was used for co-processing of […]
Preparation of benznidazole pellets for immediate drug delivery using the extrusion spheronization technique.
Abstract Recent advances in the treatment of Chagas disease have followed combinations of drugs that act synergistically against infection, predominantly including benznidazole (BNZ) and azoles derivatives. Possible incompatibilities between these drugs, slow dissolution of BNZ and dose adjustment difficulties are technological obstacles to the development of multidrug formulations. Thus, in the present study, BNZ pellets […]
Design, Characterization, and Optimization of Controlled Drug Delivery System Containing Antibiotic Drug/s.
Abstract The objective of this work was design, characterization, and optimization of controlled drug delivery system containing antibiotic drug/s. Osmotic drug delivery system was chosen as controlled drug delivery system. The porous osmotic pump tablets were designed using Plackett-Burman and Box-Behnken factorial design to find out the best formulation. For screening of three categories of […]