Fig. 4From: Optimized chronomodulated dual release bilayer tablets of fexofenadine and montelukast: quality by design, development, and in vitro evaluationEvaluation of immediate release fexofenadine HCl tablet layer. a Hardness (kg/cm2). b Friability (%). c Disintegration time (seconds). d Drug release (Q+5%). Evaluation of sustained release montelukast sodium tablet layer. e Hardness (kg/cm2). f Friability (%). g Weight variation (mg). h Drug release (Q+5%) (Mean ± SD)Back to article page