Browsing by Author "Bhattacharya, SK"
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Publication Effectiveness of an Educational Feedback Intervention on Drug Prescribing in Dental Practice(Kathmandu University, 2012) Rauniar, GP; Das, BP; Manandhar, TR; Bhattacharya, SKABSTRACT Background Irrational use of drugs as well as inappropriate and over drug prescribing leads to unnecessary expenditures and emergence of resistant bacterial strains. Feedback intervention on drug prescribing habits and face to face educational intervention of prescription audit would be effective in rationalizing prescribing practices. Objective To measure the impact of educational feedback intervention on the prescribing behavior of dental surgeons. Methods Prospective audit of twelve hundred outpatients prescriptions in dental OPD at BPKIHS of those dental surgeon who attended the educational intervention session was collected randomly by trained persons on customized data collection sheet before and after educational intervention. Results A total 1200 prescription were collected, 300 before and 300 after intervention period at the internal of one month, three months and six months. Majority of the prescriptions (39.33%) contained four drugs but after intervention, prescriptions contained mostly one drug, 73% in first month, 78.67% in third month and 65.34% in six month. Mean number of drugs per prescription after intervention were decreased. There was increased number of generic names of drugs after intervention. Amoxicillin, Metronidazole, Chlorhexidine, Povidone iodine gargle, Nimesulide, Ibuprofen, Ibuprofen + paracetamol, and Paracetamol were most commonly prescribed by dental prescribers before and after intervention. Selection of antimicrobial was done on empirical basis which was correct because Amoxicillin concentration reaches effectively in gingival crevicular fluid and Metronidazole covered effectively against anaerobic bacteria were found in orodental infection. The uses of topical anti-infective preparation as irrigants of choice that can kill majority of micro-organisms found is root canal and dental tubules and minimize systemic use of antimicrobials. Nimesulide prescribing needs to be rationalized. Conclusion Feedback educational intervention of prescription audit is effective to improve their prescribing behaviors and rationalize drug utilization pattern for the benefit of the patients. KEY WORDS Dental prescriber, drug utilization, feedback educational interventionPublication Evaluation of anxiolytic activity of tensarin in mice(Kathmandu University, 2007) Rauniar, GP; Deo, S; Bhattacharya, SKIntroduction: Anxiolytic drugs are amongst the most frequently prescribed drugs. Available anxiolytic agents are associated with several limitations. Several indigenous drugs are being evaluated but none has been proved to be effective. Objectives: Aim of the present study is to evaluate the anxiolytic effect of Tensarin. Material and method: The behavioural tests were conducted with single dose schedule and multiple seven-dose schedules of Tensarin 50mg/kg, 100mg/kg and 200mg/kg in comparison with Diazepam 1mg/kg in mice using open field test, activity-monitoring and passive avoidance test. There were eight treatment groups in each treatment schedule. Each group consisted of ten animals of either sex. The data obtained were analyzed using non- parametric test and P-value of less than 0.05 was considered to be statistically significant. Results: Multiple doses produced anxiolytic effect as indicated by an increase in rearing, number of crossing and the time spent by the animals in Central Square. It was also seen that there was significant decrease in step down latency, increase in step down error and time spent by animal in shock zone, these effects were not observed in single dose study. Conclusion: Tensarin shows a dose dependent anxiolytic effect but further studies are needed to find out the exact mechanism of action of the formulation. Key words: Tensarin, Anxiolytic activity, Open field test, Passive avoidance test.Publication Phenotypic characterisation and drug sensitivity testing of mycobacteria isolated from extra-pulmonary tuberculosis(Kathmandu University, 2010) Gurung, R; Bhattacharya, SK; Pradhan, B; Gurung, S; Singh, YIAbstract Background: Tuberculosis (TB) is a major cause of morbidity and mortality globally, with most cases occurring in developing countries. The importance of extra pulmonary tuberculosis (EPTB) among all forms of tuberculosis has not yet been ascertained in developing countries Objective: To identify and perform phenotypic characterization of clinically important mycobacterium isolates from extra-pulmonary sites along with drug susceptibility testing. Materials and methods: A total of 513 specimens from patients of (EPTB) with varied presentation were studied. Speciation and characterization of isolates were done on the basis of growth and biochemical characteristics. Drug susceptibility testing for mycobacterium isolates was done by proportion method. Results: Fifty four patients clinically suspected to have extra-pulmonary tuberculosis were culture positive for mycobacteria. On characterization 48 of the 54 isolates were identified as M. tuberculosis, 4 as M. bovis and 2 were M. avium/ intracelulare. Drug susceptibility testing was done for the both M. tuberculosis as well as M. bovis. In single drug resistance, Streptomycin was highest followed by Isoniazid, Ethambutol and Refampicin. Multi drug resistance (MDR) was found in 6 isolates and it was observed only in group I cases. Conclusion: EPTB accounts for 10-15 percent of all cases of tuberculosis. Mycobacterium was present in 10.5 percent samples. 48 isolates out of 54 samples were found to be M. tuberculosis. The maximum numbers of M. tuberculosis were isolated from lymph node aspiration. Key words: Phenotypic characterization, drug susceptibility, extra pulmonary tuberculosisPublication Recent advancement in drug delivery system(Kathmandu university, 2008) Paudel, KR; Rauniar, GP; Bhattacharya, SK; Das, BPAbstract Ease of drug administration, safety, affordability and efficacy are the major concerns in pharmacotherapy leading to exploration of better drug delivery systems. Liposomes are lyotropic liquid crystals composed mainly of ampiphilic bilayers and these are more frequently used as drug carriers. Liposomes help reduce the toxicity and deliver the drug to the target tissue. So far, liposomes have been the most intensively studied lipid-based delivery system. In liposomes, a hydrophilic drug can be trapped in aqueous interior or channels between successive phospholipids bilayers whereas a hydrophobic drug can reside with the bilayer itself. The non-toxic and nonimmunogenic bilayers dissipate allowing the diffusion of the drug into the tissues. Attachment of polyethyl glycol to the surface of liposome (known as stealth liposome) aids in the better targeting of the drug to the tissues. Pegylated proteins and polymers of lactic and glycolic acids have been well studied as drug carriers and found to be resistant to phagocytosis and complement activation. Newer DNA based strategies including DNA vaccination and antisense oligonucleotides and immunomodulation show good results for new therapeutic systems. Though the DNA based therapeutic systems have high selectivity and specificity with few adverse effects, these systems are so far restricted to animal models and clinical trials. Key words: stealth liposome, microspheres, pegylated protein, polymers, antibody, DNAPublication Recent advances in the management of epilepsy: A review(Kathmandu University, 2005) Bhattacharya, SK; Rauniar, GP; Das, BPEpilepsy is a complex disorder affecting brain function having a variety of contributing factors. The genetic predisposition plays a key role in the genesis of epilepsy. The already existing antiepileptic drugs (AEDs) provide effective control of majority of patents with different types of seizures. In some refractory cases and in those patients who can not tolerate the conventional AEDs, there is an urgent need to provide relief by controlling the seizures adequately. Various newer approaches in the rational management of seizures have been evolved during the recent years, based on different mechanisms of action and side effects profile. A brief account of these newer treatment modalities have been incorporated in this review in order to enlighten the readers about the possible beneficial effect of this regimen vis a vis the limitations of such use. Keywords: Neurotransmitter imbalance, defective gene, newer antiepileptic drugs, plasma levels, newer approaches.Publication Vagus nerve stimulation: A novel approach for prevention and control of refractory seizures(Kathmandu University, 2007) Bhattacharya, SK; Das, BP; Rauniar, GP; Sangraula, HIn order to understand the brain function and to treat various neuropsychiatric illnesses including epilepsy, continued search and discovery of newer antiepileptic drugs has failed to revolutionize the approach in the management of this complex disorder. Moreover, in close to 30% of epilepsy patients, the seizure control is either not satisfactory or it is intractable to pharmacotherapy. Amongst the non-pharmacological treatment options for refractory epilepsy, vagus nerve stimulation occupies a unique position as an adjunctive treatment in prevention and control of partial-onset seizures in adults and adolescents older than 12 years. Though the precise mode of action of VNS is still debatable an honest attempt has been mode here to review all possible literatures available on VNS to establish its role in the management of this complex disorder. Key words: Neuropsychiatric illness, Intractable Epilepsy, Vagus nerve stimulation, Seizure control