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Register a new userStudying formulation and in-vitro evaluation of solid self-emulsifying systems of furosemide
دراسة صياغة دواء الفورسميد باستخدام تقنية النظم ذاتية الاستحلاب الصلبة وتقييمها في الزجاج
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Added by
Damascus University رسالة ماجستير
Publication date
2018
fields
Pharmacy
and research's language is
العربية
Created by
Shamra Editor
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تحسين معدل ذوبان دواء الفورسيميد في الأوساط الحيوية باستخدام النظم ذاتية الاستحلاب وتحضيرها بشكل اقراص وذلك لتحسين توافره الحيوي والحد من التباينات في المعالجة بين الأفراد حيث يصنف الفورسيميد من أدوية الصف الرابع وفق التصنيف الصيدلاني الحيوي لمحدودية ذوبانيته ونفاذيته.
Improving the solubility rate of fursemide in biological media by using self-emulsifying systems and preparing them in the form of tablets in order to improve its bioavailability and reduce variations in treatment between individuals. Fursemide is classified as a fourth-class drug according to the biopharmaceutical classification due to its limited solubility and permeability.
References used
Saviani KT, Gajjar AK, Saviani JK . Drug Solubility : Importance and Enhancement Techniques
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Improving the solubility rate of fursemide in biological media by using self-emulsifying systems and preparing them in the form of tablets in order to improve its bioavailability and reduce variations in treatment between individuals. Fursemide is classified as a fourth-class drug according to the biopharmaceutical classification due to its limited solubility and permeability.
Methyldopa, an anti-hypertensive drug having a half life of less than 2 hours, and given with a dose of 250 mg 3-4
times daily.
Objective: The present study was for objective of developing a sustained release (SR) matrix tablets of methyldopa
usin
g hydroxypropyl methylcellulose(HPMC) as release controlling factor, and to study the effect of some formulation
factors on drug release from tablets.
Methods: Hydrophilic SR matrix tablets containing 250 mg of methyldopa were prepared using wet granulation
method. Granules were evaluated for moisture content, loose bulk density, tapped bulk density, compressibility index
and hausner’s ratio. Tablets were subjected to physiochemical studies and in vitro dissolution study. Effect of
concentration and viscosity grade of HPMC, both binder and lubricant concentration on drug release from matrix
tablets was evaluated .
Results: All formulations showed physiochemical properties which appear to be in compliance with pharmacopeial
standards. From the in vitro dissolution studies, it was clear that as the concentration or viscosity of polymer increased,
the rate of drug release was found to be decreased. Higher concentration of binder (PVP K30) showed slower release
of drug, while the level of lubricant(magnesium stearate and talc) appeared to insignificantly affect release rates. Drug
release kinetics of about all formulations correspond best to Korsemeyer-Peppas model and drug release mechanism
was found to be anomalous (non-Fickian) diffusion based on release exponent value. The formulation F6 (containing
15% HPMC K100M ) was selected as the optimized formulation as it sustained the release over 24 hrs.
Conclusion: The results of this study showed that the drug release from HPMC based matrix tablets using methyldopa
as a drug model could be modulated by varying the polymer concentration, the polymer viscosity and the binder
concentration with no significant effect of varying the lubricant concentration.
The objective of the present study was to formulate methyldopa sustained release
matrix tablets using hydrophilic hydroxypropyl methylcellulose (HPMC) alone or in
combination with hydrophobic ethyl cellulose polymer(EC). Matrix tablets were prepare
d
by wet granulation method, and subjected to physiochemical studies. All formulations
showed physiochemical properties which appear to be in compliance with pharmacopeial
standards. The in-vitro dissolution studies showed that increase in concentration or
viscosity of HPMC polymer led to decrease in the rate of drug release decreased. The
results also revealed that Combination of HPMC K4M and EC slower drug release more
than using HPMC K4M alone. Drug release kinetics of about all formulations correspond
best to Korsemeyer-Peppas model and drug release mechanism was anomalous diffusion
based on release exponent value.
The process of collecting and transporting solid waste is the first and fundamental issue in the management of solid waste as it is the most economically expensive operation, in which its expenses in the process of system of municipal solid waste man
agement (MSWM) reaches about 60-70% of the total expenditure. This process starts from placing waste in containers till unloading these containers in transportation vehicles and then carry them to transfer stations or final disposal sites.
The fees of collection and transportation can be reduced through the selection of the optimal path, and thus obtaining many economical benefits.
In this research, the applications of geographical information systems (GIS) have been used in order to choose the optimal route for waste collection, transportation and transference in the city of Lattakia, Where a database has been designed which included mainly the streets, bridges and tunnels, it also included residential areas serviced by waste containers, and the process of linking them to each other took place by using the techniques of GIS in order to choose the best economical and timetable ways for the traffic of vehicles to collect and transport the waste, which contributes practically and effectively in improving the activities of municipal solid waste management in this city.
Ferula hermonis Boiss in spite of being used for many purposes , it does not have adequate studies.
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