**3. Applications of CDs in drug delivery**

Interestingly, cyclodextrins which are undoubtedly very effective complexing agents, and denoted with the different synonyms like cyclic oligosaccharides, cycloamyloses, cavitron, cycloglucan, cellulosine, and Schardinger sugars, are also invaluable from the drug delivery perspectives. These multipurpose CDs have also successfully found applications as drug delivery systems in nanoparticles, microcapsules, liposomes, oral drug delivery, nasal drug delivery, parenteral drug delivery, rectal drug delivery, peptide and protein delivery, dermal/transdermal delivery, and controlled drug delivery. Herewith, as can be inspected from **Table 2**, various approved and marketed drugs available in different countries worldwide are tabulated [9].


*Introductory Chapter: Historical Background – Fundamental Structural and Physiochemical… DOI: http://dx.doi.org/10.5772/intechopen.107434*


### **Table 2.**

*Approved and marketed drug-CD complexes in different markets worldwide.*
