PREPARATION AND EVALUATION OF FAST DISSOLVING TABLETS OF PITAVASTATIN BY 32 FULL FACTORIAL DESIGN
DOI:
https://doi.org/10.22159/ijap.2020v12i1.35678Keywords:
Pitavastatin, Fast dissolving tablets, Indion 414, Direct compression, Factorial designAbstract
Objective: The objective of the present work was to prepare an optimized, fast dissolving tablet (FDT) of Pitavastatin to increase its dissolution by applying 32full factorial design.
Methods: Nine formulations (PF1 to PF9) with all possible combinations according to 32full factorial design by selecting two factors i.e. concentration of super disintegrant, Indion414 (5-15%) (A) and sublimating agent, camphor (40-60%) (B) as independent variables at three levels of-1, 0 and 1. The effect of these two variables on three dependent parameters, water absorption ratio (Y1), disintegration time (Y2) and in vitro drug release (Y3) was studied. All the powder blends were evaluated for precompression parameters, and the tablets were prepared by direct compression method which were further evaluated for post-compression parameters. The effect of change in concentration of two selected factors on dependent parameters was studied through 3D surface response plots and polynomial equations using Design expert software version11. Optimized formula was obtained by desirability and overlay plots for which compatibility stability was assessed.
Results: Precompression and post-compression parameters were satisfactorily within acceptable limits. Optimized formulation was prepared to prove the validity of the evolved mathematical model, which contained 6.75 mg of indion414(0.9) and 54 mg of camphor(0.9) with a disintegration time of 21 sec., water absorption ratio of 113 and 93% of drug release within 12 min. The compatibility between drugs and excipients was proved. The dissolution profiles of optimized formulation and commercially available conventional film-coated tablets of Pitavastatin were compared.
Conclusion: The optimized formulation showed significantly (P>0.05) increased drug release compared to commercially available film-coated tablets. No changes in disintegration time, drug content and in in vitro drug release from optimized formulation on storage for 3months at 40 °C±2 °C/75% RH±5% RH were observed during stability studies which confirmed the stability of the optimized formulation.
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