A review.Cyclodextrins are widely used and are among the most acceptable pharmaceutical excipients.These are cyclic oligosaccharides compounds with a hydrophilic outer surface and a lipophilic inner/central cavity.This unique property makes them popular excipient in pharmaceutical field.In pharmaceutical industry, Cyclodextrins are mainly been used as a complexation agent to increase aqueous solubility, bioavailability and to stability of drugs.A number of cyclodextrin based products have reached to the market based on their ability to camouflage undesirable physiochem. properties of drugs.This review article aims to asses the properties of cyclodextrin and their use in drug delivery, Complexation techniques, characterization of complex, regulatory status and future scope for their usage in advanced drug delivery.