Formulation optimization of Kyllinga brevifolia total flavonols solid dispersion controlled porosity osmotic pump tablets Preparation of osmotic pump tablets ginsenoside Rg3 of solid dispersion and its release characteristic in vitro Study on preparation and release mechanism of  effervescent osmotic pump tablet of compound Danshen Review of effervescent technique in pharmaceutics research Study on methodology of determination of Yizhi osmotic pump tablets active ingredient in Beagle dog plasma by LC-MS/MS