The classical psychoanalytic interpretation of drug addiction in adolescence considers this conduct as a symptomatic expression of an erotic substitute, responding to the vicissitudes of the ?crisis of identity? and the mourning of oedipal objects. However, under the light of the Rorschach protocols of adolescent drug addicts, there are indications that it is difficult to invest the narcissistic position and to implement oedipal investments and their defensive arsenal. The difficulty of constructing oneself as a subject and distinguishing oneself in one?s relationship with the other, is a sign of mourning complicated by the quality of depressive and/or melancholic identifications: the subject can not get rid of the object, the thinking process being blocked under the anguish of loss of the object and necessarily parts of the self-identified with it, which reactivates fantasies of self collapse or fear of depersonalization. It is on this melancholic or severe depressive background that addiction to drugs is added to our cases. The drug addict who feels cut off from a part of himself, unconsciously attached to the melancholic object, experiences a state of ill-being or psychic suffering of not being able to appropriate his self. Inhibition has transformed his psychic space into a desert or chaos, and it is the sensational effect of «spleen» that gives him a feeling of inhabiting one?s body, of finding the limits of oneself and experiencing the feeling of continuity of the self. Despite the fact that inhibition has fundamentally impoverished the ego of adolescents in psychic energy, it still plays an important defensive function in maintaining or fixing identity boundaries weakened by the anxiety of schizophrenic depersonalization.