The in-vitro release studies were carried out for formulations in both acidic and basic media and the release profile is shown in the Fig. 1. The % drug release at the first hour for pure chitosan, ghatti gum and optimum PEC was 14, 33 and 25 % respectively with more than 95 % getting released by end of 8 hrs whereas around 80 % was released in case of PEC. This release pattern was anticipated and can be very well explained based on previous such similar studies. Chitosan has high solubility in pH 1.2 which is due to the free amino groups present in the molecule which become ionized resulting in rapid dissolution with burst effect [10], whereas at alkaline pH also the drug released quickly. This might be due to the poor gel forming ability and easy disintegration characteristics of chitosan as reported [11]. In case of ghatti gum the release observed at 1st hour was higher with slower release in between followed by rapid release later. This pattern of drug release is attributed to the dissolving of the drug present on the tablet surface, gradual swelling followed by rapid erosion which predominates in the later half as observed. In case of the PEC, the drug release was sustained with delay as the time prolonged. This was because it involves formation of new bonds or correction of the distortions of the polymer chains with the resulting difference in electrostatic interactions [1] between the polymer backbone altering the matrix stability and swelling profile of the blend polymer compared to the pure chitosan/ghatti gum accounting for the above release pattern