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Preparation,Characterization, In Vitro Release and Taste-masking Effect of Paroxetine Resinate

??OBJECTIVE To prepare and characterize paroxetine resinate, and evaluate the in vitro drug release rate and taste-masking effect. METHODS A full factorial design was first conceived and applied to screen some process and formulation parameters (reaction temperature, stirring speed, drug concentration in solution and the ratio of resin to drug) on the key responses of resinationprocess, such as drug utilization ratio, drug loading and complexation constant. The paroxetine resinate was then characterized and evaluated by scanning electronic microscope (SEM), differential scanning calorimetry (DSC), in vitro drug release test and panel test of taste-masking. RESULTS The resin/drug ratio and reaction temperature were identified as the most important factors on paroxetine resinate preparation.The drug-resin complex was successfully formed via ion exchange mechanism rather than physical absorption with complete in vitro drug release (>96%) in acidic or salt solution and good taste-masking effect.CONCLUSION Paroxetine resinate with good performance can be prepared via optimization of process and formulation parameters, which will facilitate the development of generic paroxetine suspension.