The present invention is related to the field of pharmaceutical technology and describes the preparation of a novel modified starch i.e., starch valerate and its concentration optimization in fast dissolving systems in order to obtain an immediate release of active pharmaceutical ingredients (APIs) and improved dissolution rate. The novel superdisintegrant which is a modified starch i.e., starch valerate is compatible in the formulation of fast dissolving systems for about large number of APIs with enhanced dissolution rate and dissolution efficiency within 5 minutes. In this invention, formulation of fast dissolving tablets employing starch valerate forms a platform technology for immediate release of APIs that belong to different chemical and pharmacological categories which need immediate release for faster therapeutic action. Also, the fast dissolving systems employing the novel superdisintegrant, starch valerate is suitable for immediate release of several APIs. Therefore, the development of the novel superdisintegrants like starch valerate are necessary, as they are biodegradable, economical and safe to use.