Flowability of the preparation was improved considerably by adding talc and magnesium stearate. In vivo absorption was around 3% and there was a slight improvement in the bioavailability [Table - 5]. Finally sensory study on disintegration time and mouth feel attributes ranked the present formulation based on grittiness, chalkiness and overall preference as the best [Table - 6]. It can be concluded from the present work that co processed excipients of mannitol and microcrystalline cellulose are superior to physical mixtures of mannitol and microcrystalline cellulose used in fast dissolving tablets.