The aim of this study was to develop celecoxib (CLX) -polyvinylpyrrolidone (PVP) solid dispersion nanoparticles with and without surfactant using the supercritical antisolvent (SAS) process. effect different surfactants such as gelucire 44/14, poloxamer 188, 407, Ryoto sugar ester L1695, D-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) on nanoparticle formation dissolution well oral abs...