The widely used superdisintegrants are CP, croscarmellose sodium (CCS) and SSG. In the present investigation, the preparation and evaluation of fast dissolving tablets by using coprocessed superdisintegrants containing CP, CCS and SSG was studied. The reasons for selection of CP are high capillary activity, pronounced hydration capacity and little tendency to form gels. CP superdisintegrant is effective in wet granulation, dry granulation and direct compression in tablet processing[19]. CCS swells 4- 8 folds in 10 sec. The cellulose derivative swells in two dimensions readily[20]. In tablet formulations, it may be used in both direct compression and wet granulation processes. SSG was chosen because of its high swelling capacity[21]. Carbamazepine[22] tablets containing coprocessed superdisintegrants exhibit quick disintegration and improved drug dissolution. It can be concluded from the present work that coprocessed superdisintegrants of CP+CCS are superior to CP+SSG.
In the present work, fast dissolving tablets of Montelukast sodium (MS) were prepared using novel co-processed superdisintegrants consisting of CP along with CCS, and CP along with SSG in the different ratios (1:1, 1:2 and 1:3). Effect of coprocessed superdisintegrants on wetting time, disintegrating time, drug content, and in-vitro release have been studied.