WordNet sense 1 (a person who relies on another person for support (especially financial support)):

dependent

WordNet sense 2 (contingent on something else):

qualified

WordNet sense 3 (imposing or depending on or containing a condition):

conditional

WordNet sense 4 (addicted to a drug):

hooked, strung-out, drug-addicted

WordNet sense 5 (compulsively or physiologically dependent on something habit-forming):

addicted