ABSTRACT
Attaining sustained release through particle size manipulation and coating are the subjects of the following. The former will be treated first. The aim of the chapter is to cover principles and theory of products sustained by sizing and by coating. It is not the purpose to cover details about processes, examples, and raw material selection, and for that purpose the reader is referred to the Recommended Reading at the end of
the chapters. Some coverage of processes and raw materials will be given to the extent needed for covering the principles and theory.
