Environment is seldom friendly to many API's. Environmental factors such as light, humidity and air have deleterious effect on stability of many such API's. The shelf life of these API's can be enhanced by protecting them against these environmental factors. DRUGCOAT polymers belonging to E series can be of vital Importance in protecting against environmental factors. By using DRUGCOAT E series we can improve patient compliance by taste and odor masking of unpleasant API's.