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Taste-masked orodispersible tablets of cyclosporine self-nanoemulsion lyophilized with dry silica

Abstract The aim of the current study was to investigate the effects of formulation parameters on the disintegration, water absorption and dissolution characteristics of cyclosporine A (CyA) loaded self-emulsifying drug delivery system (SEDDS) in an orodispersible compacts. Its taste masking efficiency was also attempted using an electronic tongue. ODTs were prepared by freeze-drying liquid SEDDS and synthetic amorphous silica suspension followed by direct compression. The influences of the compression forces and super-disintegrant were evaluated to optimize tablet characteristics. The liquid SEDDS was characterized by vesicular size of 48.5 nm, polydispersity index of 0.95, turbidity of 40.7 NTU and rapid CyA dissolution and emulsification rate. The results of micrometric studies demonstrated an acceptable flow, hardness and friability to indicate good mechanical strength of ODTs. The interaction and Pareto charts demonstrated a greater effect of low compression force to increase the porosity and facilitate the disintegration rather than the deformation action of the super-disintegrant. Super-disintegrant level was the most important factor affecting the dissolution parameter followed by the compression force then their interaction effect. Moreover, as indicated by Euclidean distance values and discrimination indices, the unpalatable taste and aversion taste of CyA to stimuli were masked in its optimized SEDDS incorporated ODTs.