ABSTRACT
This chapter discusses the rudimentary foundations of pharmacology that must be considered when designing drug delivery systems and provides clinical examples where drug delivery systems are playing a critical role. It describes novel approaches in drug delivery to illustrate the fast development of this field. The oral route is the most commonly preferred route for drug administration. A drug delivery system can be defined as a formulation or a device that facilitates the introduction of a therapeutic substance into the body with the objectives of improving its efficacy and safety. Drug delivery formulations refer to the application of pharmaceutical principles to modify the active principle or its excipients to improve drug pharmacokinetics, pharmacodynamics, or both. Ideally, the most effective drug delivery system would be to provide a biodegradable nontoxic carrier that would have a structure that would enhance uptake and bioavailability for the delivery of the therapeutic treatment of tumor cells.
