04. October 2018
Praziquantel is an antiparasitic drug used for decades. Currently, the praziquantel commercial preparation is a racemic mixture, inwhich only the levo-enantiomer possesses anthelmintic activity. The knowledge of its properties in the solid state and other chemical-physical properties is necessary for improving its efficacy andapplications. Drug solid dispersions were prepared with calcium carbonate at 1:5 drug to excipient weight ratio by solventevaporation method. Then, the modification of the...
15. June 2018
This study explores the influence of different synthesis methods and drying conditions in the preparation of sodium alginate-derivate xerogels presenting interesting disintegrant functionalities. Xerogels containing alginic acid (AA) or calcium alginate (CaA) and a mixture of both, AA/CaA, were isolated using two different drying methods oven and rotary evaporation. AA showed the best wettability behavior, in contrast to the rigid crosslinked CaA structure which showed a limited rate of water...
08. May 2018
Hydroxypropyl cellulose (HPC) is a water-soluble polymer used as a binder during pharmaceutical tableting and granulation. HPC is also known as a base material for pharmaceutical film by virtue of its film formability with excellent plasticity. The aim of this study was to assess the applicability of HPC to orally disintegrating film (ODF) and to investigate optimization of the ODF formulation of HPC. The effects of the molecular weight of HPC and the addition of active pharmaceutical...
06. November 2017
Jellies for oral administration are dosage forms that contain water, as stipulated in the Japanese Phar- macopeia, and heat is generally applied to the jellies during the manufacturing process. Therefore, it is difficult to formulate drugs that may be affected adversely by water and/or heat.
07. October 2017
The aim of this work was to develop an innovative drug delivery system potentially useful for the local delivery of Bisphosphonates to bone tissue. We propose the use of Solid Lipid Microparticles (MPs), up to now mainly used for oral and topical drug delivery, as carrier for bisphosphonates due to the favourable biocompatibility and lower toxicity of the lipids compared with many polymers. The delivery platform consisted of a biomimetic α-tricalcium phosphate-gelatin cement (CPC) enriched...
18. April 2017
Abstract The structural changes of crystalline atorvastatin upon high-energy ball milling at room temperature have been studied. The study investigates the effect of polyvinylpyrrolidone (PVP) and hydroxypropylmethyl cellulose (HPMC) polymeric matrix on stabilizing amorphous atorvastatin before and after storage under ambient and elevated humidity conditions. The materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrophotometry (FTIR), differential scanning...
20. March 2017
ABSTRACT The study carried out here was focused on developing conventional monolithic controlled release matrix tablet of Atorvastatin calcium using carbomer as release controlling polymer. This system ensures the drug release at the alkaline pH region where the drug has got maximum solubility. Further the study was concentrated on comparing the impact of gelling agent polyvinyl pyrrolidone on drug release. Quality by design tools were considered during formulation development and the polymer...
15. March 2017
Abstract In this work, a bottom-up approach based on the study of polyelectrolyte interactions was performed in order to evaluate the effect of Prosopis alba exudate gum as novel excipient for fish oil encapsulation in composed calcium-alginate-chitosan beads. Emulsion and beads properties such as oil distribution, encapsulation efficiency, yield, microstructure and thermo-oxidative protection were evaluated. Alginate and gum exert a synergistic effect on emulsion stability properties, which...
11. October 2016
Orally disintegrating tablets (ODTs) are a preferred dosage form compared with conventional tablets because of the numerous advantages they offer, such as rapid dissolution and fast onset of action. To maintain the porous structure needed for fast dispersion, most current ODT formulations are limited by their mechanical strength. With functionalised calcium carbonate, however, pharmaceutical manufacturers can produce ODTs that offer high mechanical strength while disintegrating twice as fast as...
20. July 2016
Abstract The purpose of this work was to develop a multiparticulate system exploiting the pH-sensitive prop- erty and biodegradability of calcium alginate beads for intestinal delivery of ceftriaxone sodium (CS). CS was entrapped in beads made of sodium alginate and sodium carboxymethylcellulose (CMC), acacia, HPMC K4M and HPMC K15M as drug release modifiers. Beads were pre- pared using calcium chloride as a cross-linking agent, followed by enteric coating with cellulose acetate phthalate...