Table 3: Passive versus active targeting.

Sl. no.Passive targetingActive targeting

(1)Utilizes the special deviated conditions prevailing in the diseased portion of the bodyDepends on the species
that is overexpressed
during disease
(2)Less selectiveHighly selective
(3)Restricted in useVery versatile
(4)More likely to produce side effectsLess likely to induce side effects