Table 3.

Advantages and disadvantages of conventional delivery systems.

Advantages of Conventional DDS	Disadvantages of Conventional DDS
Convenience in administration	Poor absorption from site of administration
Non-invasive and better IVIVC	No target specificity
Accurate and measured unit dosage form	Premature excretion from the body
Higher shelf-life	Premature metabolism of the drug
Accommodate patient variation	Poor bioavailability
Flexibility for physician to dose adjustment	Repeated dosing
Low cost	Poor patient compliance