Posted by admin on Mar 1, 2010 in |
The present study was undertaken to find out the potential of gum from Almond gum to act as a binder and release retardant in tablet formulations. No significant work has been reported to use it as a tablet binder. The effect of almond gum and pvp on the release of diclofenac sodium was studied. The FT-IR spectroscopic studies of drug, gum and mixture indicated no chemical interaction. Seven formulations were prepared by wet granulation method containing Microcrystalline cellulose as diluents, diclofenac sodium as model drug using 2%,4%,6%,8% and 10% w/v of almond gum solution and 2%,4% w/v of pvp gum solution. This was carried out to find out the difference between synthetic and natural gum and whether synthetic gum can be replaced by natural gums. Physical and technological studies of granules and tablets like flow rate, carr’s index, Hausner’s ratio, angle of repose, friability and disintegration time were determined and found to be satisfactory. The drug release increased with almond gum when compared to synthetic gum concentration of 2%...
Read More
Posted by admin on Mar 1, 2010 in |
ABSTRACT The present study aims to evaluate the wound healing activity of gel containing cow ghee and aloe vera in rats. Incision wounds for tensile strength and excision wounds contraction along with the histopathological examination of the regenerated tissues were employed to investigate the wound healing potential. Topical application of the test formulation alone promoted the tensile strength (incision wounds) and wound contraction (excision wounds) showing healing potential comparable to framycetin sulphate cream (1%w/w). Histological examination reveals good keratinization, epithelization, fibrosis and collagenation indicative of the wound healing potential of gel. The present study thus offers a valuable insight into the claimed wound healing potential of the test...
Read More
Posted by admin on Mar 1, 2010 in |
Mesalazine is used, either orally or rectally, as an anti-inflammatory agent in treating ulcerative colitis and, to a lesser extent, Crohn’s disease. Mesalazine is a white to pinkish crystalline powder. It is slightly soluble in cold water and alcohol; more soluble in hot water, soluble in hydrochloric acid. A simple UV spectrophotometric method was developed for the determination of Mesalazine (MEZ) in pure and its pharmaceutical formulations. Mesalazine exhibiting max absorbance at 210 nm in methanol and obeyed linearity in the concentration range of 0.2-50 mg/ml. The proposed method was statistically...
Read More
Posted by admin on Mar 1, 2010 in |
Gastroretentive dosage forms have potential for use as controlled drug delivery systems. Multiple unit systems avoid the “all-or-none” gastric emptying nature of single unit system. A controlled release system designed to increase its residence time in the stomach without contact with the mucosa was achieved through the preparation of floating microballoons by the emulsion solvent diffusion technique using acrylic polymers (i.e. Eudragit RS-100 and Eudragit S-100) with drug (metformin) in a mixture of ethanol, dichloromethane and propanol. The effect of various formulation and variables on the internal and external particle morphology, micromeritics properties, in vitro floating behavior, physical state of the incorporated drug, drug loading and invitro drug release was studied. The microparticles were found to be regular in shape and highly porous. The release rate was determined in simulated gastro-intestinal fluids at 37oC. The formulation demonstrated favorable invitro floating and release characteristics. The drug encapsulation efficiency was high. Incorporation of Eudragit RS-100 and Eudragit S-100 in the microballoons proved to be an effective method to achieve the desired...
Read More
Posted by admin on Mar 1, 2010 in |
The present study concerned with the development and characterization of bioadhesive vaginal film (VF). Zidovudine containing VF were prepared by solvent casting method using different ratios of Acrycoat S 100 (AC) or Ethyl cellulose (EC) to Hydroxy propyl methyl cellulose (HPMC) and di butyl phthalate(DBP) as a plasticizer. The optimized films were found to be transparent, flexible and soft and evaluated for mechanical properties by modified instrument, drug content, folding endurance, in vitro drug release with release kinetic and % moisture content bioadhesive strength by modified pan balance method. The films were found higher drug content and flexible. The VF10 (containing AC: HPMC 4:1) was selected. In vitro drug was found of Zidovudine over 11 hr obeying zero order followed by Higuchi kinetics and Case II non-Fickian (anomalous) diffusion control, indicating the rate of drug release is due to the combined effect of drug diffusion and polymer relaxation with a sufficient bio adhesion quality with good mechanical properties. The results were compared statistically and found with satisfactory correlation. Thus...
Read More
