Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
The research to accelerate furosemide, dissolution rate has been done through physical property modification by solid dispersion forming polyvinylpyrolidone (PVP) carrier with solvent method.Pure furosemide prosses property of being practically insoluble in water and has low biovailability .In current research,six weight ratio of furosemide to PVP being used are 1:1;1:3;1:5;1:9 and 1:15.Physical mixtures are made in equivalent weight ratio. The dissolution rate was examined by paddle method in phosphat buffer pH5,8.Solid dispersion caracterised with in vitro dissolution study,X -ray diffraction,infra red spectrophometer and differential scanning calometric.The result shows that solid dispersion of furosemide with PVP carrier is lugher compare to physical mixture dissolution rate and pure furosemide.The ratio furosemide to PVP who has the lughest dissolution rate is 1:15.The analyzing shows the existing of altering crystaline to amorphous state.

Abstrak :
Chitosan is a polycatonis biopolymer that can form gel in acidic environment so that can be used as a hydrophilic matrix in controlled release drug delivery system. In this research, propranolol hydrochloride controlled release granule was made in chitosan matrix. Granules were made by wet granulation method with variety of matrices, i.e. chitosan, hydroxypropyl mthylcellulose (HPMC) and ethyl cellulose (EC). HPMC and EC were used as a comparing matrix. The release rates of propranolol HCl from matric were determined by using dissolution apparatus type I with 50 rpm stirring rotation in acidic media of pH 1,2 and base media of pH 7.5 for 8 hours. Sample was taken at certain time and the samples were anakyzed by spetrophotometer. The result showed that the release of propranolol hydrocholride from chitosan matrix was the slowest compared to the other matrices.

Abstrak :
Propranolol hydrochloride is antihypertension agent that has a short biological half life of 2-6 hours. Microcapsules of propranolol hydrochloride are prepared by solvent evaporation method using ethylcellulose as a wall material with the drugpolymer ratio 1:1, 1:2, and 1:3 for sustained release oral delivery. The microcapsules were then evaluated by particle size distribution analysis, shape and morphology (SEM), drug content, and dissolution studies. In vitro dissolution was studied using the dissolution apparatus II (paddle) with chloride buffer (pH 1,2) dan phosphate buffer (pH 6,8) medium. The drug-polymer ratio have an important influence on drug release from microcapsules where the increase of polymer cause the higher drug release inhibition.