Posted by admin on Apr 1, 2014 in |
Skin has to bear various external traumas like wounds, burns, blisters, irritation etc. as well as topical diseases like psoriasis, vitilago, cancer and herpes. Various drug delivery systems like vesicles, microspheres, transdermal patches, nanoemulsions, microemulsions, microsponges etc. are available which are better than conventional drug delivery methods because these bypass systemic circulation as well as drug can be targeted directly to the required site. Microsponges are tiny sponge-like spherical particles with a large porous surface and provide controlled release. Herpes simplex is a viral disease occurring in two forms Herpes labialis and Herpes keratitis which occur on lips and epidermal layer of skin respectively. Conventional formulations used for treating herpes have various drawbacks like irritation, rashes, frequency of dosing and low bioavailability. Hence microsponge loaded topical preparations herbal gel and medicated lipstick of Acyclovir was prepared with a purpose to overcome these drawbacks. Microsponge loaded controlled release formulations of Acyclovir were prepared using quasi emulsion solvent diffusion method. The proposed formulations of Acyclovir loaded microsponges were characterized for particle...
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Posted by admin on Apr 1, 2014 in |
A rapid and sensitive method for the determination of the best conditions that allow us to calibrate the ibuprofen in drug is presented. This approach uses high performance liquid chromatography with DAD detector, which is a separation method most used because it is fast, easy, and maintains the nature of the mixture to be separated. The spectra of ibuprofen were recorded using several mobile phases “58%Na2HPO4 (50mmol/l), 42%ACN” and “60%ACN, 40% water “when the pH values are (pH=2.5 and pH=5); the flow rate values are 0.9ml/min -1.5 ml/min with detection wavelength of 240nm; and two stationary phases using the C18 column and Phenyl urea column (25cm x 4.6mm, 0.5µm). The ibuprofen sample: 1 mg of ibuprofen dissolved in 1 mL of water. For this we have tried through our study aiming relying on foreign...
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Posted by admin on Apr 1, 2014 in |
Zopiclone (ZPC), a cyclopyrrolone derivative, is a short-acting hypnotic agent. Its pharmacological properties include hypnotic, sedative, anxiolytic, anticonvulsant and muscle-relaxant actions. ZPC has a single chiral centre, and its enantiomers are S-zopiclone (S-ZPC) and R-zopiclone (R-ZPC). S-ZPC was adjudge to possess two- fold enhanced pharmacological activity than racemate (ZPC) while its opposite enantiomer R-ZPC appears to have almost zero activity and elevated toxicity. A high performance LC-MS\MS method employing positive electrospray ionization was developed for the simultaneous determination of both S-ZPC and R-ZPC in human plasma samples by using S-Zopiclone d8 as internal standard. Analytes were extracted from plasma samples by employing solid phase extraction technique. After extraction, 5µL of clean sample was injected on to chromatographic system and distinct separation achieved on chiralpak IC-3, 0.46 cm I.D*15 cm L column with the isocratic mobile phase consisting of a mixture of Ammonia in Acetonitrile and Milli Q Water. Detection was performed using API 4000 MS that monitors specific transition per compound in Multi Reaction monitoring mode. Limit of quantitation...
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Posted by admin on Apr 1, 2014 in |
AIDS, a pandemic disease caused by HIV has a high mortality rate. Therapeutic failures have risen due to the emergence of resistant viral strains and adverse side-effects of Anti-HIV drugs. Thus, there arises a need to develop novel and promising anti-HIV drugs. BMS-378806 (BMS-806) inhibits the initial stages of HIV-1 infection by blocking the binding of viral gp120 protein to host-cell CD4 receptor. Protein- Ligand interaction plays a major role in structure-based drug designing. In this study, analogs of BMS-378806 drug for HIV target protein gp120 were virtually designed using Marvin Sketch 4.1.10 and molecular docking studies were carried out using HEX 4.1 docking software. From the results, it was observed that, analog-6 showed better binding affinity to gp120 with Etotal = -102.67 than the original BMS-378806 drug, thus indicating that this compound might be considered as a potential drug candidate against gp120 for controlling HIV-1 infection. Further studies need to be carried out to evaluate the pharmacological efficacy of these...
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Posted by admin on Apr 1, 2014 in |
Niosomes, an emerging class of novel vesicular systems, are non-ionic surfactant vesicles which can entrap both hydrophilic and lipophilic drugs. Niosomes are incorporated into in situ gels for sustained release of drug and to prolong the residence time. The aim of present study is to formulate and evaluate ocular niosomal in situ gels of Linezolid. Linezolid is a potent synthetic oxazolidinone derivative active against a broad range of gram positive and gram-negative aerobic and anaerobic bacteria. Niosomes were prepared using various surfactants (span 20, span 40, span 60 and span 80) in different ratios using thin film hydration technique. They were evaluated for particle size, entrapment efficiency and in vitro drug release. Niosomes prepared using cholesterol and span 60 in the ratio 1:2 showed higher entrapment efficiency and better in vitro drug release. The optimized formulation was formulated as in situ gels using Carbopol 971P and HPMC K4M in different ratios and evaluated for gelling capacity, pH, viscosity, in vitro drug release, drug content, antimicrobial activity and ocular irritation...
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