Posted by admin on Sep 1, 2011 in |
Purpose: The aim of this study was to enhance the dissolution rate of Cyclosporine A, a poorly water-soluble drug by developing a self micro-emulsifying (SME) tablet formulation by using the liquisolid compact technique. A liquisolid system is formed by converting a liquid formulation into a dry, free-flowing and compressible powder mixture with selected carrier material and coating material. This technique has industrial applications for low dose insoluble drugs. Method and Results: The solubility of Cyclosporine A (BCS ClassⅡdrug), as a model drug in this study, was determined in several oils, surfactants and co-surfactants using an HPLC method. The self micro-emulsifying system of Cyclosporine A was constructed by using Maisine 35-1 and Lauroglycol FCC (1:1, w/w, oil phase), PEG-35 Castor Oil (surfactant) and PEG 400 (co-surfactant). The ratio of these components in the formulation was 20:50:30 (w/w) and optimized by a pseudo ternary phase diagram. The droplet size of the optimized liquid with drug was 32.9±0.1nm. The stability experiment results showed the model drug in the micro-emulsifying system was stable...
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Posted by admin on Sep 1, 2011 in |
Nanoemulsions are submicron sized emulsions that are under investigation as drug carriers for improving the delivery of therapeutic agents. These are the thermodynamically stable isotropic system in which two immiscible liquids are mixed to form a single phase by means of appropriate surfactant and cosurfactant. Nanoemulsion droplet sizes fall typically in the range of 20-200nm and shows narrow size distribution. In this review attention is focused to give the brief regarding formulation aspect, method of preparation characterization techniques, evaluation parameters and various application of the nanoemulsions, several techniques are to be used for preparation of nanoemulsions like microfluidization, high pressure homogenization, low energy emulsification and solvent evaporation method and parameter that are to be used for its characterization like droplet size analysis ,viscosity determination, drug content, refractive index, pH, zeta potential, Transmission electron microscopy, thermal stability, release and in vitro skin permeation study. These are applicable in drug...
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Posted by admin on Sep 1, 2011 in |
Cassia tora Linn. (Family: Leguminosae) is well known plant widely distributed in India and other tropical countries. It is an annual under shrub and grows in wild wasteland. Different parts of the plant (Leaves, seed, and root) are reputed for their medicinal value. It is well recognized traditional medicine as laxative and is useful for treatment of leprosy, ringworm infection, ophthalmic, skin diseases and liver disorders. Several chemical compounds such as Anthraquinone glycosides, Naphthopyrone glycosides, Phenolic compounds, Flavonoids etc. have been isolated from this plant. The present review summarizes the scientific information of various aspects of Cassia tora plant used in traditional system of medicine for variety of...
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Posted by admin on Sep 1, 2011 in |
β- Thalassemia is an inherited genetic disorder which is caused by different kinds of mutations in the HBB gene in chromosome 11. Due to several types of mutation in β- gene, globin chains cannot synthesise completely and free α-globin is highly unstable and readily precipitates bound heme and iron. In β- thalassemia these precipitated iron, repeated blood transfusion and increased gastrointestinal iron absorption lead to iron overload in the body. The increased free iron in blood is responsible for the formation of Reactive Oxygen Species (ROS). If the production of ROS exceeds the capacity of enzymatic and non-enzymatic antioxidants systems to scavenge these species or if these protective systems are compromised, then oxidative stress occurs. This review summarizes the production of ROS, its effect and different drug and plant extract used as an antioxidant as well as chelating agent in thalassemic...
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Posted by admin on Sep 1, 2011 in |
Chitosan is a cationic natural polysaccharide which is derived from the chitin of crustaceans, with crabs and shrimp-shell wastes as its principal source. Its properties includes extent of deacetylation and the average molecular weight of polymer as well as low toxicity and good bioavailability make it a novel excipient in pharmaceutical formulation as a relatively new development. Together with chitin, chitosan is well thought-out the second most abundant polysaccharide subsequent to cellulose. But in contrast to cellulose, the application of Chitosan in pharmaceutical field is a pretty new development. Recently there are so many formulation were prepared and evaluated within different dosage forms such as ophthalmic, nasal sublingual, buccal, periodontal, gastrointestinal, colon specific, vaginal, transdermal as well as gene carrier which is based on the application of chitosan and its derivatives. Chitosan is biocompatible and show the activities such as antimicrobial and antifungal activities, which makes it a favourable option for biomedical applications. It has been proven to be useful in tissue growth, in tissue repair and accelerating wound-healing...
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