Sarabu, Sandeep published the artcileHypromellose acetate succinate based amorphous solid dispersions via hot melt extrusion: Effect of drug physicochemical properties, Formula: C17H18N2O6, the main research area is hypromellose acetate succinate amorphous solid dispersion hot melt extrusion; Efavirenz; HME; HPMCAS; Nifedipine; Solid dispersions; Supersaturation.
In this study, the impact of drug and hydroxypropyl methylcellulose acetate succinate (HPMCAS) grades physicochem. properties on extrusion process, dissolution and stability of the hot melt extruded amorphous solid dispersions (ASDs) of nifedipine and efavirenz was investigated. Incorporation of drugs affected the extrusion temperature required for solid dispersion preparation Differential scanning calorimetry and powder X-ray diffraction studies confirmed the amorphous conversion of the drugs in the prepared formulations. The amorphous nature of ASDs was unchanged after 3 mo of stability testing at 40°C and 75% relative humidity. The dissolution efficiency of the ASDs was dependent on the log P of the drug. The inhibitory effect of HPMCAS on drug precipitation was dependent on the hydrophobic interactions between drug and polymer, polymer grade, and dose of the drug. The dissolution efficiency and dissolution rate of the ASDs were dependent on the log P of the drug and solubility and hydrophilicity of the polymer grade resp. The inhibitory effect of HPMCAS on drug precipitation was dependent on the hydrophobic interactions between drug and polymer, polymer grade, and the dissolution dose of the drug.
Carbohydrate Polymers published new progress about Amorphous materials. 21829-25-4 belongs to class pyridine-derivatives, name is Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate, and the molecular formula is C17H18N2O6, Formula: C17H18N2O6.