The purpose of this study on the formation of particles during the spray drying effects were evaluated.
To compare the solubility of solid dispersion of water - soluble polymer in the proportion of each choice was a test. After more than a certain ...
The purpose of this study on the formation of particles during the spray drying effects were evaluated.
To compare the solubility of solid dispersion of water - soluble polymer in the proportion of each choice was a test. After more than a certain percentage of HPMC the solubility showed a tendency to deterioration, Poloxamer 188 and Cremophor RH-40 was added, showed the best solubility. By varying the particle size reduction was realized by spray - drying, microparticles with sizes (d(0.9)) from 3.8 to 17.7 ㎛ were produced, with total process yields ranges from 90 % to 95 %, An decreased liquid feed rate was found to increase total process yields, and higher atomizing pressure were found to incresase process yields. In addition, microparticles with fenofibrate, a model poorly water - soluble drug, were prepared by spray - drying using three different the solution concentration ; 4.3 %, 5.6 %, 8.9 %. Better solution quality due to low concentration, the particle size became smaller, especially in the low boiling point higher percentage of methylene chloride, the more the particle size is small. Solid state characterization by X - ray diffraction (XRD) and Differential Scanning Calorimetry (DSC) verified the maintenance of the crystalline state of the drug after spray - drying. XRD and DSC showed no change in crystallinity of the drug due to the technological process of microparticle production. Micronization of fenofibrate (99 % in 9 hour) enhanced its dissolution rate compared to pure fenofibrate (9 % in 9 hour). Fenofibrate, 160 mg immediate release tablets, The dissolution rate of test drug was increased to 85.6 % after 15 min, while 60.3 % of reference drug dissolved in the same time. After 30 min, about 99.8 % of test drug was dissolved, but there was 87.5 % of reference drug dissolved.
In conclusion, microparticle prepared by spray - drying when the drying temperature is the most important factor is believed to be. In addition to solubilization fenofibrate unlike conventional milling method was found to show a high recovery rate.