Objective: To study the relationship between preparation and dissolution rate of the solid dispersion of Naproxen and polyvinyl pyrrolidone (PVP) on different composition. Methods:The solid dispersion was prepared by solvent method. The solubility, the dissolution rate and the derivative thermogravimetry (DTG) were determined. Results:The solubility and the dissolution rate of solid dispersion were remarkably increased. When it is in 1∶5 weight ratio the amount of drug released in 20 min is 671 times that...