Almost 40% of the new chemical entities at present self find out poorly water soluble drugs. Badly water soluble drugs have solubility and dissolution related bioavailability problems. Solubility is one of the most important parameter to give desired concentration of drug in systemic circulation to get its pharmacological response. Orally administered drugs obtained completely absorb only when they show fair solubility in gastric medium and such drugs shows good bioavailability. The solubility and dissolution properties of drugs perform an valuable role in the process of formulation development. Enhancement of solubility of drug is the most challenging job in drug development process. Solubilization may be affected by co solvent water interaction, micellar solubilization, reduction in particle size, inclusion complexes, solid dispersion, and change in polymorph. This review highlight various techniques of solubility enhancement with special emphasis on Chemical modification methods like Salt formation, Co-crystallization, Co-solvency, Hydrotropy, use of novel solubilizer etc along with physical modification techniques. Keywords: Salt formation, Co-crystallization, Solubility, particle technologies, Milling solubility enhancement, Cosolvent, physical and chemical methods.

Aims: The aim this research work is to formulate and evaluate thermoreversible gel of antifungal agent Clotrimazole for treatment of vaginal infection. Place and Duration of Study: Department of Biopharmaceutics, Government College of Pharmacy, Karad, Maharashtra, India, between June 2009 and July 2010. Methodology: Different Formulations of thermoreversible gel of antifungal agent Clotrimazole were prepared by using various concentrations of ethanol, PEG 400, sodium dodecyl sulphate, polycarbophil and pluronic F 127 and pluronic F 68. The gel formulations were subjected for evaluation on the basis of rheological behaviour, mucoadhesive behaviour, in-vitro performance. Results: The results indicate that Polymers such as polycarbophil, PEG- 400 in various concentrations to prepare formulations were found to release drug for period over 12 hrs. Without getting dislodged. The formulations have satisfactory rheological behavior and their diffusion profile is comparable to the marketed gel formulation. Significant difference was observed in the rheological behavior of formulations. Gel strength, spreadability, mucoadhesive strength of formulation B and C were desirable. Drug diffusion of formulation B and C were 95.2% release after 11 hrs 98.5% release after 11 hrs, respectively which was good as compared to marketed formulation showing drug diffusion of 102.2% after 10 hrs. Conclusion: On basis of the results we concluded that developed thermoreversible gel of Clotrimazole will be better alternative to conventional dosage form Clotrimazole & will improve patient compliance.

As from the last eras number of the revolution in the drug delivery technologies have been seen to attain the targeted drug delivery or site specific action of the drug. The prospects of the drug delivery by using biomimetic nanoparticles such as virosomes is an motivating research & development field as showing targeted action by fusion with the targeted action by fusion through target cell. It can be engaged as vehicle & vaccines furthermore victory of virosomal drug delivery depends on the method used to make the encapsulated bioactive materials, characterization & formulation of finished products. They are reconstituted viral envelopes that can be conveyance of different macromolecules as these are biocompatible, biodegradable, nonautoimmunogenic. Virosomes denotes such a unique system for presentation of antigen to immune system. Peptides, nucliecacid & medications such as antitoxins, anticancer agents &steroids can be encapsulated. This review focus on various aspects of Virosomes, such as Structure of Virosomes Component, Advantages, disadvantages, Method of preparation, Characterization, recent Patents and applications of Virosomes etc. Key words: Neurodegenerative, Nonimmunogenic, Endolysosomal, Cryoprotectants, Applications.

Aim: The aim this research work is to formulate and characterize Poly Sulfoxyamine Grafted Chitosan Coated contact Lens. Methodology: Poly Sulfoxyamine Grafted Chitosan was used for coating the Lens & converting it in to Antimicrobial Lenses. Poly Sulfoxyamine Grafted Chitosan was performed in the presence of pyridine and further treatment with ammonia during reaction of Thionyl chloride & chitosan. The UV light interference, visible light transmission and antimicrobial evaluation were studied. Results: The results indicate that Contact lenses prepared with Modified Poly Sulfoxyamine Grafted Chitosan absorbed some UV radiation & does not interfere with visible region. Due to the antimicrobial activity of modified Chitosan, the growth and transmission of micro organisms are reduces in coated Lens as compared to uncoated Lens. Conclusion: On basis of the results we concluded that Modified Poly Sulfoxyamine Grafted Chitosan might be used as coating material or material for making contact Lenses which will be less susceptible for microbial contamination.

This article illustrates the Formulation and Characterization of Mucoadhesive microspheres of Gliclazide Hydrochloride. The mucoadhesive microspheres were prepared by the Emulsion Solvent Evaporation method by using Eudragit L 100 and Ethyl Cellulose 22 CPS polymers & PEG 4000 added as a pore forming agent . Formulated microspheres were evaluated for various parameters. The characteristics like shape and structure of prepared microspheres were determined by Optical microscopy and scanning electron microscopy respectively. The prepared microspheres exhibited prolonged drug release (12 hrs) the mean particle size increased as the concentration of Eudragit L 100 increased. Decrease in size of microspheres leads to decrease in mucoadhesion time, % drug loading and faster the drug release. The optimized formulation shows following cumulative release after 12 hrs i.e. 96.40%. The microspheres exhibited 80% mucoadhesion and showed good drug entrapment efficiency i.e. 80.13±0.91% as well as drug loading efficiency is 26.70±0.75%. It can be concluded that the present mucoadhesive microspheres can be an ideal system to deliver the Gliclazide Hydrochloride in the sustained release manner for management of Type II Diabetes Mellitus.