This book will provide information about various methods of complexation along with their advantages and disadvantages. It finds broad application for researchers working in area of problems or limitations of BCS class II and IV drugs. Complexation of drug (guest) with cyclodextrins (host) is widely used for enhancement of solubility, stability, dissolution, bioavailability of both herbal and synthetic drugs. It is applicable in all the areas of medicine, pharmacy, science, chemistry and allied branches.