Posted by admin on Aug 1, 2013 in |
The purpose of writing this review on floating drug delivery systems (FDDS) was to compile the recent literature with special focus on the types of floating drug delivery systems, principal and mechanism of floatation to achieve gastric retention. Drug delivery systems are those that float immediately upon contact with gastric fluids present promising approaches for increasing the bioavailability of drugs with absorption windows in the upper small intestine. However, immediate floating can only be achieved if the density of the device is low at the very beginning. Devices with an initially high density (which decreases with time) first settle down in the stomach and, thus, undergo the risk of premature emptying. Inherent low density can, for example, be provided by the entrapment of air or by the incorporation of low density materials or foam powder. This review explains briefly about factors affecting floating system, evaluation parameters and application of the...
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Posted by admin on Aug 1, 2013 in |
Drug delivery systems including chemical, physical and biological agents that can enhance the bioavailability, improve pharmacokinetics and reduce toxicities of the drugs. Carrier erythrocytes are one of the most promising biological drug delivery systems investigated in recent decades. Resealed Erythrocytes are biocompatible, biodegradable, possess long circulation half-life and can be loaded with variety of active drug substances. Resealed erythrocyte has got several advantages over the other drug delivery system which makes it superior than other systems. Carrier erythrocytes are prepared by collecting blood sample from the organism of interest and separating erythrocytes from plasma. By using various methods, the cells are broken and the drug is entrapped into the erythrocytes, finally they are resealed and the resultant carriers are then called “resealed erythrocytes”. Resealed erythrocytes, as a drug delivery system has excellent capacity to enhance the therapeutic index and patient compliance. It has got tremendous potential to achieve site specific drug delivery with least wastage of drugs and it also prolong the release of drug. So many drugs like...
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Posted by admin on Aug 1, 2013 in |
In the last few decades, to synthesize the different new heterocyclic compounds along their derivatives which were evaluated for their biological activities as antimicrobial, antiviral, antitumor, anticonvulsant, antifungal, the triazole moiety seems to be very small but in the biological profile has attracted the attention of many researchers to explore this skeleton to its multiple potential against several activities. In this review we provides a brief response of the medicinal chemistry of 1, 2, 4-triazole and its derivatives. A literature survey of procedures for the preparation of 1, 2, 4-triazole and 1, 2, 3-triazoles is presented by generalized synthetic...
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Posted by admin on Aug 1, 2013 in |
As the conventional treatment is associated with large number of side effects, herbal treatment is gaining popularity particularly in the treatment of chronic disease like jaundice, vitiligo, rheumatoid arthritis, asthma etc. Herbal treatment has been identified as safe and effective in treating such disease. The aim of this study was to review systematically the evidences and effectiveness of herbs used in the treatment of different forms of arthritis and their anti‐inflammatory or anti‐arthritic properties have been evaluated clinically. A number of plants have been identified as anti-inflammatory and anti-arthritic, but only few of them have evidence of clinical trial. We searched the following electronic database Cochrane Complementary Medicine Field Register; Cochrane Controlled Trials Register (CCTR); and MEDLINE for our study. The reviewed herbs appear relatively safe, further research is needed to examine their efficacy, safety and potential drug...
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Posted by admin on Aug 1, 2013 in |
Pharmacogenetics (PGt) is an established discipline that studies the genetic basis of inter-individual variability in the response to drug therapy and pharmacogenomics (PGx) is the branch of pharmacology which deals with the influence of genetic variation on drug response in patients by correlating gene expression or single-nucleotide polymorphisms with a drug’s efficacy or toxicity. The goal of personalized medicine is to maximize the likelihood of therapeutic efficacy and to minimize the risk of drug toxicity for an individual patient. Many unexpected pharmacodynamic responses and pharmacokinetic variations among individuals during drug therapy involve genetic factors. These genetic factors contribute to variations at many levels, including drug transport, metabolism, and interaction at the receptor site. Understanding and monitoring the underlying pharmacogenetic factors will allow physicians to optimize efficacy and minimize side effects. In March 2005, the FDA released its final version of the “Guidance for Industry: Pharmacogenomic Data Submissions” clarifying what type of pharmacogenomic data needs to be submitted to the FDA. In addition, the guidance, for the first time, encourages...
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